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Dissertations / Theses on the topic 'Dactylis glomerata'

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Published: 4 June 2021
Last updated: 25 July 2025

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1

Mills, Annamaria. "Understanding constraints to cocksfoot (Dactylis glomerata L.) based pasture production." Phd thesis, Lincoln University. Agriculture and Life Sciences Division, 2007. http://theses.lincoln.ac.nz/public/adt-NZLIU20070717.161658/.

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This research examined the mechanisms by which temperature, water availability and nitrogen (N) affect the dry matter (DM) yield potential of cocksfoot (Dactylis glomerata L.) dominant pastures. The experiment was a split plot design with main plots of fully irrigated (I) or dryland (D), sub-plots of N fertiliser at 800 kg N/ha in 2003/04; and 1600 kg N/ha in 2004/05 (+N) or 0 kg N/ha (-N). The potential environmental yield of an established 8 year old cocksfoot dominant pasture was 21.9 t DM/ha/y from I+N pastures compared with 9.8 t DM/ha by I-N pastures and 15.1 t DM/ha/y by D+N pastures.
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2

Cauneau-Pigot, Anne. "Pollen allergisant de dactylis glomerata L. (Gramineae) : Biopalynologie et immunochimie." Paris 6, 1990. http://www.theses.fr/1990PA066437.

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Le pollen de dactylis glomerata l. Est un pollen typique des graminees par sa structure. La connaissance de l'etat biologique du pollen lors de sa liberation dans l'atmosphere est indispensable pour etablir une bonne strategie de conservation et de stockage. Leur absence d'endexine, caractere propre a cette famille, en fait des pollens de structure fragile, qui ne se conservent que quelques heures, lorsqu'ils ne sont pas traites. Apres elaboration d'un milieu optimal, des essais de germination in vitro ont ete pratiques sur les pollens frais, afin d'etablir le taux initial de fertilite. Celui-
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3

Madembo, Célestin. "Etude de la variabilité, interclonale et intergénotypique de la croissance pondérale du dactyle (Dactylis glomerata L.)." Grenoble 2 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb37599319g.

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4

Jones, Gordon B. "Persistence and Productivity of Orchardgrass (Dactylis glomerata L.) in Hay Stands." Diss., Virginia Tech, 2017. http://hdl.handle.net/10919/74878.

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Persistence of perennial grass crops is essential to their profitable management. Recently, orchardgrass producers in the Mid-Atlantic have reported a reduction in the persistence and regrowth vigor of their swards. The overall objective was to evaluate which factors play a major role in controlling the persistence of orchardgrass harvested for hay in the Mid-Atlantic. A survey of orchardgrass fields, growth chamber experiment, and field experiment were conducted to that end. The objectives were to: (1) assess soil fertility, management practices, disease status, and climate in relation to pro
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5

Fontana, Sonia Giuseppa. "Caratterizzazione biologica, fisiologica e qualitativa di cloni siciliani di Dactylis glomerata L." Thesis, Università degli Studi di Catania, 2011. http://hdl.handle.net/10761/151.

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Nell'ambito dell'attivita' di studio e di ricerca connessa al corso di Dottorato in Scienze delle Produzioni Animali e' stata studiata una collezione di genotipi di Dactylis glomerata L. reperiti in ambienti diversi della Sicilia per altitudine e latitudine al fine di caratterizzarli per gli aspetti morfologici, biologici, agronomici e genetici in vista di possibili programmi di selezione e incrocio. Nella prima parte della tesi si fa cenno alle caratteristiche climatiche della regione mediterranea e a quelle della Sicilia in particolare, come pure alla vegetazione tipica di questi ambienti.
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6

Maceira, Néstor Oscar. "Signification évolutive de la polyploi͏̈die, mécanismes et conséquences : exemple de Dactylis glomerata L. (Graminacées)." Montpellier 2, 1990. http://www.theses.fr/1990MON20216.

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Les frequences de production de diplogametes males et femelles, consideres comme etant a l'origine de la polyphoidisation sexuelle, le comportement reproductif des individus issus de gametes normaux et de diplogametes dans des croisements entre cytotypes diploides et tetraploides et l'aptitude a la competition des diploides et des autotetraploides naturels apparents ont ete etudies dans le complexe polyploide dactylis glomerata. La formation de diplogametes a ete mise en evidence chez les neuf sous-especes diploides analysees. Les frequences moyennes de diplogametes ont ete estimees egales a 1
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7

Gügler, Beat. "Die Konkurrenz zwischen Wiesenschwingel (Festuca pratensis Huds.) und Knaulgras (Dactylis glomerata L.) bei verschiedener Bewirtschaftung /." Zürich, 1993. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=10081.

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8

Potdar, Madhukar Vishwanathrao. "Interference in monocultures and mixtures of orchardgrass (Dactylis glomerata L.) and timothy (Phleum pratense L.)." Thesis, University of British Columbia, 1986. http://hdl.handle.net/2429/27510.

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Interference among plants involves responses of plants to their environment as modified by the presence and/or growth of neighbouring plants. An important theme of research on plant interference is the relationship between plant population density and measures of plant growth or agricultural yield. An experiment on plant interference was performed in which plots of two important forage species, orchardgrass (Dactylis glomerata L.) and timothy (Phleum pratense L.), were grown at different total population densities and mixture proportions. Measures of plant growth and yield were taken at five s
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9

Wittebolle, Guy. "Influence des basses temperatures racinaires sur la croissance, le regime hydrique et la repartition des assimilats chez le dactyle (dactylis glomerata l. )." Université Louis Pasteur (Strasbourg) (1971-2008), 1988. http://www.theses.fr/1988STR13028.

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Analyse des consequences du refroidissement des racines sur la croissance et le developpement du dactyle en phase vegetative permettant l'etude du fonctionnement de la plante entiere en rapport avec la contrainte hydrique et la nutrition minerale
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10

Wittebolle, Guy. "Influence des basses températures racinaires sur la croissance, le régime hydrique et la répartition des assimilats chez le dactyle (Dactylis glomerata L.)." Grenoble 2 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb376192458.

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11

Al-Sbei, Mohammad Rateb. "Dynamique de la croissance modulaire et métamérique d'une Graminée Dactylis glomerata L : variabilité environnementale et génétique." Montpellier 2, 1988. http://www.theses.fr/1988MON20090.

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On aborde la cinetique modulaire et metamerique de la croissance du dactyle sous la forme d'une etude in situ de la morphogenese, de la demographie foliaire et de la production. On suit notamment la croissance et la mortalite des tolles (modules) et des feuilles (metameres). L'effet de la densite sur la morphogenese, les correlations de croissance et la production aerienne a ete evaluee. Les variabilites genetique et environnementale, ont ete comparees en termes de morphogenese sur une centaine de descendants issus de tous les croisements possibles entre trois genotypes
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12

Bretagnolle, François. "Etude de quelques aspects des mecanismes de la polyploidisation et de ses consequences evolutives dans le complexe polyploide du dactyle (dactylis glomerata l. )." Paris 11, 1993. http://www.theses.fr/1993PA112447.

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Plusieurs aspects intervenant dans l'apparition et la colonisation des polyploides ont ete etudies dans le complexe polyploide du dactyle (dactylis glomerata l. ). A travers ce travail, nous montrons en particulier, que le succes des polyploides proviendrait plus d'effets instantanes sur la moyenne des caracteres que sur des differences de plasticite entre niveaux de ploidie
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13

LEDUC-BRODARD, VIRGINIE. "Les allergenes de pollen de graminee. Etude du repertoire, purification et caracterisation des allergenes de dactylis glomerata." Paris 7, 1995. http://www.theses.fr/1995PA077220.

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Le repertoire des allergenes du pollen de dactylis glomerata, graminee tres bien representee en france, a ete etudie par electrophorese bidimensionnelle a haute resolution (en gradients de ph immobilises) suivie d'immuno-empreinte. Les immunoglobulines de type e de patients allergiques ont permis de detecter une centaine de taches peptidiques allant de point isoelectrique 4 a 10 et de masse moleculaire allant de 60 a 6 kda. Les allergenes majeurs, reconnus par plus de 50% des patients allergiques etudies, ont ete purifies par isoelectrofocalisation preparative suivie de chromatographie liquide
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14

Berjeaud, Jean-Marc. "Etude de dac gbi : allergene glycoproteique majeur du pollen de dactyle (dactylis glomerata). application de la spectrometrie de masse a l'analyse structurale de glycanes." Toulouse 3, 1991. http://www.theses.fr/1991TOU30185.

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Les pollens de graminees sont responsables d'un nombre important d'allergies respiratoires, le pollen du dactyle (dactylis glomerata) se situe dans notre pays au premier rang de ce type d'affection. L'allergene glycoproteique majeur du pollen de dactyle, dac g i, a ete purifie par isoelectrofocalisation preparative et chromatographie. La partie glycanique d'une fraction allegenique heterogene dac g i:m a ete partiellement caracterisee. Elle est composee de 7 oligosaccharides de structures voisines. La glycoproteine dac g i purifiee contient 4% de sucres, les monosaccharides la composant etant
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15

Ardouin, Pierre Jacques. "Analyse, par la biochimie flavonique, de la structure génétique et de l'organisation évolutive d'un complexe polyploïde : Dactylis glomerata L. (Gramineae)." Lyon 1, 1985. http://www.theses.fr/1985LYO11652.

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Constitution du complexe polyploide (14 sous-especes diploides, 5 sous-especes tetraploides). Isolement et identification par 2 types de chromatographgie des principaux composes flavoniques (600 echantillons representatifs de 30 stations). Importante variation flavonique, organisation evolutive du complexe
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16

Gauthier, Perrine. "Variation altitudinale, écologique et génétique, et recherche de la différenciation écotypique chez deux espèces végétales alpines : Lotus alpinus(D.C.) Schleicher et Dactylis glomerata L." Montpellier 3, 1997. http://www.theses.fr/1997MON30042.

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La differenciation genetique au sein des especes est un phenomene courant chez les vegetaux qui sont fortement dependants des conditions de leur environnement. Cette differenciation qui necessite souvent un isolement au moins partiel des populations, sera ecotypique si elle depend aussi des pressions de selection du milieu. Les conditions climatiques extremes des milieux d'altitude et leur heterogeneite generent des differenciations ecotypiques et chromosomiques. Celles-ci sont etudiees, en vanoise, chez deux especes communes des milieux d'altitude et appartenant a des complexes polyploides, l
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17

Kuhn, William Robert. "Pest management of billbugs in orchardgrass grown in Virginia." Thesis, Virginia Tech, 2010. http://hdl.handle.net/10919/76916.

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The bluegrass billbug (Sphenophorus parvulus Gyllenhal) and hunting billbug (Sphenophorus venatus vestitus Chittenden) have become important pests of orchardgrass (Dactylis glomerata L.) grown in Virginia, causing 40 - 100% stand losses according to a 2005 survey of over 324 ha (800 ac) of orchardgrass. Their sheltered feeding habits combined with a lack of labeled insecticides for orchardgrass make billbug control extremely difficult for this crop. Over two seasons, orchardgrass fields were surveyed for paired feeding holes caused by feeding of the billbug spring adult. Simultaneously, barr
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18

Cruz, Pablo. "Relations de compétition dans une association luzerne-dactyle : étude des dynamiques de la croissance et des prélèvements d'azote." Paris 11, 1985. http://www.theses.fr/1985PA112210.

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Ce travail analyse les relations de compétition intra et interspécifiques au sein de l’association luzerne (cv Lutèce)-dactyle (cv Lutetia) et des cultures pures correspondantes. La dynamique de croissance de la biomasse aérienne et des prélèvements d’azote a été étudiée au cours des différentes repousses. Aucune amélioration de la nutrition azotée de la graminée associée par la présence de la légumineuse, n’a pu être mise en évidence. La luzerne s’est montrée fortement compétitive pour l’utilisation de l’azote minéral dans les périodes où sa vitesse de croissance est élevée. L’azote apporté s
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19

Ghaleb, Wagdi. "Analyse de la diversité génétique de la réponse germinative à la température de populations de Lolium perenne L., Festuca arundinacea Schreb et Dactylis glomerata L." Thesis, Poitiers, 2019. http://www.theses.fr/2019POIT2273.

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La germination des graines est une étape importante dans le cycle biologique de la plante, car elle affecte le développement, la survie et la dynamique des populations de semis. La germination commence par l'absorption de l'eau par la graine et se termine par l'allongement de l'axe embryonnaire en dehors du tégument.Elle est influencée par des facteurs environnementaux et le patrimoine génétique de la graine. La température est l'une des factures les plus importants, car elle régule la germination de trois façons: en déterminant la capacité germinative et la vitesse de germination, en enlevant
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20

Glimskär, Anders. "Growth strategies, competition and defoliation in five grassland plants /." Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 1999. http://epsilon.slu.se/avh/1999/91-576-5465-4.pdf.

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21

Fily, Marc. "Succession post-culturale et pression de pâturage dans les Pyrénées centrales : étude à l'échelle de l'écosystème, de la communauté et d'une population de Dactylis glomerata L. prise comme modèle." Toulouse 3, 1990. http://www.theses.fr/1990TOU30132.

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Deux trajectoires de dynamique de la vegetation post-culturale sont etudiees dans la vallee d'oo (pyrenees centrales, altitude: 1000 m). Elles different par l'intensite du paturage qui s'y exerce depuis 3, 30 et 80 ans. Apres une revue bibliographique concernant les successions vegetales, le modele d'evolution de la vegetation qui sert de base a l'echantillonnage est presente; sa valeur comme outils de diagnostic et de prevision est illustree sur des donnees botaniques exterieures a la vallee. A l'echelle de l'ecosysteme, l'importance de la structure spatiale des couverts et la grande vitesse
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22

Ahmed, Lina Qadir. "Analyse de la variabilité inter- et intra-spécifique de cinq espèces prairiales en réponse à la température pendant la germination et la phase hétérotrophe initiale." Thesis, Poitiers, 2015. http://www.theses.fr/2015POIT2265/document.

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La germination et la croissance hétérotrophe sont des phases clés de l'établissement des plantes. Ils sont sous contrôle génétique et affectés par la température. L'objectif de cette thèse est d'analyser la variabilité inter et intra-spécifique de cinq espèces prairiales dans leurs réponses à la température pendant la germination et la croissance hétérotrophe. Trente-deux populations de Lolium perenne, Festuca arundinacea, Dactylis glomerata, Medicago sativa, et Onobrychis viciifolia ont été évalués sous huit températures constantes entre 5 et 40°C.La nouveauté de ce travail vient de la large
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23

Tikwayo, Sizwe Edward. "The biomass production, nutrient content and silage quality of Perennial ryegrass (Lolium perenne (L)) Cocksfoot (Dactylis glomerata (L)) and Tall fescue (Festuca arundinacea (Schreb)) varieties grown under irrigation in Alice, South Africa." Thesis, University of Fort Hare, 2016. http://hdl.handle.net/10353/1796.

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The study aims to evaluate the biomass production and nutrient content and silage quality of perennial ryegrass (Lolium perenne (L)), cocksfoot (Dactylis glomerata (L)) and tall fescue (Festuca arundinacea (Schreb)). Six varieties were used, two for each species. A completely randomized block designed replicated three times was conducted at University of Fort Hare Research Farm during 2014-2015 growing season. The plots were harvested at four-week interval (post emergency) for one year. Biomass yields were measured for fresh forage and dry matter yield. Duplicated samples were then dried, mill
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24

Bristiel, Pauline. "Variabilité intraspécifique des stratégies adaptatives à la sécheresse d’une graminée pérenne (Dactylis glomerata L.) : les compromis fonctionnels des traits aériens et souterrains peuvent-ils expliciter le compromis entre potentiel de croissance et survie au stress ?" Thesis, Montpellier, 2017. http://www.theses.fr/2017MONTT108/document.

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Les risques de sécheresse sévère augmentent sous l’effet du changement climatique. Mieux comprendre les stratégies adaptatives des plantes au stress hydrique est ainsi l’un des défis majeurs de la recherche écologique et agronomique. Cette thèse explore la survie à la sécheresse d’une graminée herbacée pérenne (Dactylis glomerata L.) en étudiant la variabilité intraspécifique des traits aériens et souterrains d’une quinzaine de populations natives et cultivées issues d’un gradient latitudinal allant de la Scandinavie au Maroc. Une caractérisation des populations en conditions optimales sur une
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25

Lhuissier, Franck. "Les pollens biomarqueurs de la pollution atmosphérique ? Approche microscopique et biochimique." Rouen, 1998. http://www.theses.fr/1998ROUES095.

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Nous avons étudié les potentialités de pollens comme bioindicateurs de pollution atmosphérique. Deux espèces ont été étudiées : le bouleau (Betula verrucosa Ehrh. ) et le dactyle (Dactylis glomerata L. ). Ces deux espèces sont responsables de plus de 95% des cas d'allergies au pollen en Europe. Des échantillons de pollen ont été exposés à différentes concentrations de monoxyde d'azote marqué à l'azote 15 ou de monoxyde de carbone marqué à l'oxygène 18. Ceci nous a permis de localiser les cibles cellulaires de chaque gaz en utilisant la microscopie d'émission d'ions secondaires (SIMS). Une anal
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26

Mécheri, Salah. "Contribution a l'etude de la modulation de la reaction anaphylactique grace a l'utilisation de constituants purifies du pollen de dactyle." Paris 7, 1988. http://www.theses.fr/1988PA077115.

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27

Monks, D. P. "The vegetative and reproductive development of balansa clover." Lincoln University, 2009. http://hdl.handle.net/10182/1337.

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The vegetative and reproductive development of balansa clover (Trifolium michelianum Savi.) were quantified in relation to the environmental drivers of each phenophase in field and controlled environments. In a grazed experiment over 6 years, balansa clover sown with cocksfoot (Dactylis glomerata) contributed 1.6 t DM/ha/year, or ~20% of the total DM production. However, grazing management for increased seed production during flowering in the establishment year strongly influenced balansa clover regeneration. The earliest closed plot (September) averaged between 2.2 and 4.3 t DM/ha/year of bal
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28

Al-Sbei, Mohammad Rateb. "Dynamique de la croissance modulaire et métamérique d'une graminée, Dactylus glomerata L. variabilité environnementale et génétique /." Grenoble 2 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb37611279n.

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29

Ates, Serkan. "Grazing management of subterranean clover (Trifolium subterraneum L.) in South Island (New Zealand)." Diss., Lincoln University, 2009. http://hdl.handle.net/10182/1338.

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This study consisted of two sheep grazed dryland pasture experiments. Experiment l compared sheep production from 3-year-old cocksfoot based pastures grown in combination with white, Caucasian, subterranean or balansa clover with a ryegrass-white clover pasture and a pure lucerne forage. Sheep liveweight gain per head from each pasture treatment and the pure lucerne stand was recorded in the 2006/07 and 2007/08 seasons. The cocksfoot-subterranean clover pasture provided equal (381 kg LW/ha in 2006) or higher (476 kg LW/ha in 2007) animal production in spring and gave the highest total animal p
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30

Muraki, Tomohiro. "Effects of alternative grass species on grazing preference of sheep for white clover." Diss., Lincoln University, 2008. http://hdl.handle.net/10182/1095.

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Despite the importance of a high white clover (Trifolium repens) content in temperate pastoral systems in terms of livestock performance and nitrogen fixation, the proportion of white clover in grass-clover pastures is often low (<20%). This thesis examined in two experiments whether the white clover content of pastures could be improved by sowing white clover with alternative grass species to diploid perennial ryegrass (Lolium perenne L.). In a pasture experiment, DM production, pasture composition and morphology of grass-clover mixtures was measured over the establishment year (January 2007
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Tonmukayakul, Nop. "Water use efficiency of six dryland pastures in Canterbury." Lincoln University, 2009. http://hdl.handle.net/10182/1498.

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The annual and seasonal water use efficiency of six pasture combinations were calculated from the ‘MaxClover’ Grazing Experiment at Lincoln University. Pastures have been established for six years and are grazed by best management practices for each combination. Measurements for this study are from individual plots of four replicates of ryegrass (RG)/white clover (Wc), cocksfoot (CF)/Wc; CF/balansa (Bal) clover; CF/Caucasian (Cc) clover; CF/subterranean (Sub) clover or lucerne. Water extraction measurements showed soils for all dryland pastures had a similar plant available water content of
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32

ŠIMÁNKOVÁ, Karolína. "Výživná hodnota vybraných odrůd srhy laločnaté (Dactylis glomerata)." Master's thesis, 2017. http://www.nusl.cz/ntk/nusl-320598.

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In the Czech Republic, the grasslands constitute an important landscape element and at the same time, they are one of the basic components of horses' and ruminants' rations. Therefore, the fodder quality is important in the connection with production functions of grassland forage, especially concerning the dairy cattle. The aim of the diploma thesis was to monitor changes in the nutritional value during the vegetation and the evaluation of quality indications for selected species of Cock's-foot: three existing varieties and three varieties of the new breeding. Ash, crude protein, spectra fiber
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Potůčková, Lucie. "Monitoring výskytu chorob u trav." Master's thesis, 2008. http://www.nusl.cz/ntk/nusl-95289.

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34

Stevenson, K. "Optimising grass seeding rates for improved establishment of perennial legumes in cocksfoot (Dactylis glomerata) swards." Thesis, 2018. https://eprints.utas.edu.au/29129/1/Stevenson_whole_thesis.pdf.

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The effect of grass seeding rate on legume establishment was investigated in the low rainfall region of the Tasmanian midlands. Three clover species, Caucasian clover, Talish clover and red clover were paired with one of two cocksfoot species, summer active cocksfoot or winter active cocksfoot, at three different grass seeding rates 1 kg/ha, 3 kg/ha and 5 kg/ha. Successful establishment was defined as the maintenance of a clover proportion of 20-45% in the sward, and was determined using plant number. Successful establishment of all three clover species was achieved for the 5 month duration of
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35

Nguyen, TM. "Morphological responses of cocksfoot (Dactylis glomerata L.) and tall fescue (Lolium arundinaceum Schreb.) to waterlogging stress." Thesis, 2022. https://eprints.utas.edu.au/45620/1/Nguyen_whole_thesis.pdf.

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Waterlogging is a seasonal constraint on low-lying cropping and pasture lands in temperate regions of south-eastern Australia during winter. It has been attributed to yield loss in both crops and pastures. The tolerance level of plants to waterlogging relates to physiological, biochemical, morphological and anatomical adaptive traits. Understanding the likely response and adaptive characteristics of particular pasture species and cultivar to waterlogging can assist in choosing appropriate cultivars for waterlogging prone areas. In this study, we investigated morphological responses of cocksfoo
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36

Mehta, Prem. "Phenotypic variation for forage yield and cell wall concentration associated with polyploidization and breeding of Dactylis glomerata L." 1990. http://catalog.hathitrust.org/api/volumes/oclc/23686499.html.

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Thesis (M.S.)--University of Wisconsin--Madison, 1990.<br>Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 31-35).
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37

"Priming Seeds in Aqueous Smoke Solutions Improves Germination of Agropyron dasystachyum, Dactylis glomerata, Elymus angustus, Elymus junceus, and Festuca hallii." Thesis, 2014. http://hdl.handle.net/10388/ETD-2014-06-1479.

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Seeds of many grasses and legumes from the Canadian Prairies have dormancy which prevents the germination of viable seeds in otherwise favorable conditions. Plant-derived smoke can improve germination in dormant seeds. Seeds of eight grasses, two legumes, and Lactuca sativa were investigated for the effects of seed priming in aqueous smoke solutions on germination, seedling emergence, seedling growth, and standing crop. Aqueous smoke solutions were produced by bubbling smoke generated from the incomplete combustion of wheat straw (Triticum aestivum cv. Unity) or prairie hay (Festuca hallii) t
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BERNAS, Jaroslav. "Význam trvalých travních porostů a suchovzdornost vybraných druhů trav - ovsík vyvýšený (\kur{Arrhenatherum elatius L.}) a srha laločnatá (\kur{Dactylis glomerata L.})." Master's thesis, 2012. http://www.nusl.cz/ntk/nusl-138347.

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Mills, A. "Understanding constraints to cocksfoot (Dactylis glomerata L.) based pasture production : a thesis submitted for a degree of Doctor of Philosophy at Lincoln University, New Zealand /." Diss., 2007. http://hdl.handle.net/10182/32.

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Turner, LR. "Investigating the physiology and management of cocksfoot (Dactylis glomerata L.) and prairie grass (Bromus willdenowii Kunth.) as alternative perennial grass species for the dairy industry in southern Australia." Thesis, 2006. https://eprints.utas.edu.au/22184/1/whole_TurnerLydiaRuth2006_thesis.pdf.

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Abstract:
This thesis examined the productivity and pasture herbage quality of cocksfoot (Dactylis glomerata L.) cv. 'Kara' and prairie grass (Bromus willdenowii Kunth.) cv. 'Matua', under leaf stage based defoliation management. Leaf stage (number of live leaves per tiller) is a generic measure of plant development and was used to investigate the physiology underlying the regrowth response of these species following defoliation, and to determine optimal defoliation management of cocksfoot and prairie grass plants. A survey was undertaken of Tasmanian dairy farmers, to establish the current and potenti
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