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Tesi sul tema "Ryegrass"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 25 luglio 2025

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1

Dhaliwal, Amandeep Kaur Van Santen Edzard. "Recurrent phenotypic selection for increased winter productivity in annual ryegrass (Lolium multiflorum Lam.)." Auburn, Ala., 2009. http://hdl.handle.net/10415/1797.

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2

Kopec, David M., Jeffrey J. Gilbert, and David M. Jensen. "Ryegrass Germplasm Overseeding Trials." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2001. http://hdl.handle.net/10150/216377.

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Abstract (sommario):

A field test was conducted to evaluate the turf performance of improved hybrid ryegrass (sometimes called intermediate ryegrass) Lolium hybridum versus that of perennial ryegrass germplasm (Lolium perenne) for winter overseeding purposes. "Gulf" annual ryegrass was also evaluated for comparison purposes. On all evaluation dates, the treatment effect was significant for all visual response variables measured (quality, color, texture, density, etc.). The mixture of LHRT hybrid ryegrass/Poa trivialis established quicker than other treatments during the first month (November). Perennial ryegrass e

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3

Pinkerton, E. H. "Mechanisms involved in ryegrass leaf development." Thesis, Queen's University Belfast, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.411834.

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4

Kopec, D. M., C. F. Mancino, A. Terrey, and S. Gomperts. "Ryegrass Overseed Trials for 1986-1987." College of Agriculture, University of Arizona (Tucson, AZ), 1988. http://hdl.handle.net/10150/215830.

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Ryegrass cultivars, experimental accessions, blends and composite mixtures were tested for overall adaptation to overseeded turfgrass management practices under desert conditions. Entries were significantly different from each other for color and overall turfgrass quality. Gennplasm for overseeding differs for tolerance to close mowing under desert conditions. In most cases, the better adapted entries had superior scores in two years of testing.

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5

Kopec, D. M., C. F. Mancino, M. J. Petty, and L. Salo. "Ryegrass Turf Trials for 1987-1988." College of Agriculture, University of Arizona (Tucson, AZ), 1988. http://hdl.handle.net/10150/215849.

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6

Kopec, David M., Jeff J. Gilbert, Steve Nolan, and Mohammed Pessarakli. "Perennial Ryegrass Transition Using Selected Herbicides." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2009. http://hdl.handle.net/10150/216646.

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Thirteen herbicide treatments were applied on May 8, 2006, on a golf course fairway to assess transition and turf quality effects. Initial injury to perennial ryegrass was most extreme for Tranxit GTA when applied at 1.0 oz/prod/acre and Katana applied at 2.0 oz/prod/acre. Katana resulted in the total elimination of ryegrass and resulted in a fully necrotic canopy (straw cover) within two weeks after application to July 19, 2006 (72 Days after treatment). The development and persistence of necrotic leaf tissue of perennial ryegrass (straw) had the greatest impact on decreasing overall turfgras

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7

Cook, Casey Lee. "Seeding rate and seed size as management techniques for ryegrass (Lolium Multiflorum, Lam) in winter wheat." Texas A&M University, 2002. http://hdl.handle.net/1969.1/2284.

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Higher seeding rates and larger seed sizes could enhance the competitiveness of wheat with ryegrass. Growth room and field research evaluated the effects of wheat seeding rates and seed size in competition with Italian ryegrass. Winter wheat seeds cultivar Ogallala were divided into three seed sizes: small seed passed through a sieve with 2.08mm round holes, large seed which did not pass through a sieve with 3.18mm round holes, and bulk seed directly from a commercial seed bag. These wheat seed and seed of the Italian ryegrass cultivar AGulf@ were planted in plastic pots containing

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8

Coll, R. J. "Estimation of genetic difference as a measure of relatedness and as an indication of essential derivation in Lolium perenne." Thesis, Queen's University Belfast, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.368762.

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9

Heap, Ian Michael. "Resistance to herbicides in annual ryegrass (Lolium Rigidum)." Adelaide, 1988. http://hdl.handle.net/2440/18842.

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10

Huang, Ji-Wei. "Wear tolerance in perennial ryegrass (Lolium perenne L.)." Thesis, University of Nottingham, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.389474.

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11

Kopec, David M., Jeffrey J. Gilbert, and Darren E. Kerr. "Response of Perennial Ryegrass to R.P.-EXP31130Aand R.P.-EXP31598A." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2001. http://hdl.handle.net/10150/216360.

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EXP31130A and EXP31598A were applied as repeat applications on June 5 and July 23, 1997 to perennial ryegrass maintained at 3.0 inches. Application rates were 0.18 and 0.36 lbs. AI/A (31130A) and 7.0 and 14.0 fl. oz/prod/A (31598A). Each treatment was applied with and without Sequestrene 338 iron chelate, at the rate of 0.1 oz/m². Untreated and iron-only controls were included in the test. Ryegrass was generally unaffected by either compound, under the conditions of this test. Inclusion of iron (in the tank mix) was more beneficial for EXP31598A, than for EXP31130A. Untreated controls generall

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12

James, Nicola Lewis. "The management and utilisation of white clover/perennial ryegrass and perennial ryegrass swards in relation to milk production and behaviour of dairy cattle." Thesis, Bangor University, 1992. https://research.bangor.ac.uk/portal/en/theses/the-management-and-utilisation-of-white-cloverperennial-ryegrass-and-perennial-ryegrass-swards-in-relation-to-milk-production-and-behaviour-of-dairy-cattle(1a1a64ab-31af-40f0-9dcc-fd88c15e8795).html.

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The literature concerning the nutritional content of white clover as a grazed herbage or conserved crop offered to dairy cattle and aspects of frothy bloat are reviewed. In the first nine week change-over design experiment the effect on milk production and behaviour of spring calving dairy cows grazing white clover/grass swards at contrasting sward heights were examined. Grazing the clover/perennial ryegrass sward to a height of 4 cm increased clover content, but reduced milk production. The 8 cm sward increased milk yields by 15.8%. This was accompanied by an increase in fat and protein yield

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13

Carpenter, Alexandra Cathryn. "Wheat interactions with Italian ryegrass; forage production and quality in pure and mixed stands of wheat, oats, and ryegrass; and halosulfuron interaction with soils." Texas A&M University, 2003. http://hdl.handle.net/1969.1/5956.

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A growth room experiment compared seedling growth after nine weeks of two wheat genotypes in pure cultures and mixtures with Italian ryegrass at a low phosphorus (P) level and the P level recommended by soil testing. At the recommended P level in both pure and mixed culture, Mit, a semi-dwarf genotype, had a greater height, leaf area, tiller number, and dry weight of leaves, stems and roots than did Kharkof, a landrace. These results reflected the visual selection criteria for seedling vigor and tillering used in the initial development of the semi-dwarf cultivars. Field experiments compared t

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14

Zuk, Alan James. "Factors affecting establishment of seeded zoysiagrass in perennial ryegrass turf /." Search for this dissertation online, 2005. http://wwwlib.umi.com/cr/ksu/main.

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15

Liu, Jianyang. "Morphological and genetic variation within perennial ryegrass (Lolium perenne l.)." Connect to resource, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1127245394.

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Thesis (Ph. D.)--Ohio State University, 2005.<br>Title from first page of PDF file. Document formatted into pages; contains xiii, 123 p.; also includes graphics (some col.). Includes bibliographical references (p. 99-107). Available online via OhioLINK's ETD Center

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16

Zysko, Agnieszka. "Bacterial responses to changes in phosphorus supply in Ryegrass Rhizosphere." Thesis, University of Manchester, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.518478.

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17

Manzanares, Chloé. "Genetics of self-incompatibility in perennial ryegrass (Lolium perenne L.)." Thesis, University of Birmingham, 2013. http://etheses.bham.ac.uk//id/eprint/4280/.

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Self-incompatibility (SI) prevents pollination by “self” pollen and promotes outbreeding. SI is a widespread mechanism among angiosperms. Grass SI is known to be controlled by two loci, S and Z, mapped in linkage group 1 and 2 respectively but the mechanism remains elusive. SI in perennial ryegrass (Lolium perenne L.) is studied at the gene level for the S-locus. Using a fine-mapping approach, followed by the sequencing of the genomic S-locus region and the transcripts from pollen and stigma, the project identified four stigma S-candidate genes and potentially six pollen S-candidate genes. Mor

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18

Liu, Jianyang. "Morpholotical and genetic variation within perennial ryegrass (lylium perenne l.)." The Ohio State University, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=osu1127245394.

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19

Zhang, Chunzhen. "Identification and characterization of cold-responsive genes in perennial ryegrass." [Ames, Iowa : Iowa State University], 2009.

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20

Barrett, S. K. "Growth regulators in Lolium perenne grown for seed." Thesis, University of Nottingham, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.378463.

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21

Kavanagh, S. E. "Low temperature growth and frost tolerance of winter rye (Secale cereale L.) and perennial ryegrass (Lolium perenne L.)." Thesis, University of Newcastle Upon Tyne, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.278781.

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22

Xu, Xiangming. "The genetic assessment of inbred lines and their hybrids in Lolium perenne L." Thesis, Aberystwyth University, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.283766.

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23

El, Hassani T. A. "Growth studies in Lolium multiflorum in a Mediterranean environment." Thesis, University of Reading, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.370833.

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24

Mittlesteadt, Tyler Lee. "Evaluation of novel techniques to establish and transition overseeded grasses on bermudagrass sports turf." Thesis, Virginia Tech, 2009. http://hdl.handle.net/10919/32596.

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Abstract (sommario):

Most professional turf in Virginia is comprised of bermudagrass (Cynodon dactylon L.) or (Cynodon dactylon x C. transvaalensis Burtt Davy) as a monoculture in summer and overseeded with perennial ryegrass (Lolium perenne L.) (PR) in winter, during bermudagrass dormancy. Two transitions are required in an overseeding program, fall establishment of PR and spring control of PR. During each transition, turf quality suffers as one grass dies or enters dormancy while another grass is promoted to fill voided areas. Field studies at various locations in Virginia were conducted to investigate method

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25

Aronsson, Helena. "Nitrogen turnover and leaching in cropping systems with ryegrass catch crops /." Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 2000. http://epsilon.slu.se/a214.pdf.

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26

Wetherall, Jane Ann. "The characterisation of perennial ryegrass proteases and their inhibition during ensilage." Thesis, University of Newcastle Upon Tyne, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.308366.

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27

Yang, Bicheng. "Investigations of self-incompatibility (SI) in perennial ryegrass (Lolium perenne L.)." Thesis, University of Birmingham, 2009. http://etheses.bham.ac.uk//id/eprint/1097/.

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Abstract (sommario):

Perennial ryegrass (Lolium perenne L.) is one of the most economically and environmentally important grass species for the temperate zone. It maintains effective self-incompatibility (SI), which promotes outbreeding as well as limits the efficient production of inbred lines and hybrids. SI in L. perenne is controlled by the S and Z loci, mapping to linkage groups 1 and 2, respectively. None of the gene products has been identified so far. Comparative mapping has identified regions on rice chromosomes 5 (R5) and 4 with synteny to regions of L. perenne genome containing the S and Z loci, respect

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28

Kopec, David M., D. P. Jensen, Steven B. Liddell, Jeffrey J. Gilbert, and K. B. Marcum. "Evaluation of Proxy and Primo for Growth Reduction in Perennial Ryegrass." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2001. http://hdl.handle.net/10150/216366.

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PROXY (ethephon) and PRIMO (trinexepac-ethyl) were applied to ryegrass (as overseeded turf) in winter and early spring of 1999. PGR effect was assessed as reduction in clipping weight between mowings on eleven harvest dates. From March to April, the greatest percentage reductions were realized from all PGR treatments. Over the entire test period (March 5 to May 15), clipping reduction was rate dependent for PROXY with the 10.0 ounce rate producing a greater PGR effect (less clippings than that of PROXY at the 5.0 ounce rate). PRIMO treated turf (at the highest label rate of 1.0 ounce/product/1

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29

Babu, Jacob. "Bioactive Chemicals of Importance in Endophyte-Infected Grasses." The University of Waikato, 2009. http://hdl.handle.net/10289/2608.

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Janthitrems are believed to be involved in the observed sporadic cases of AR37- infected perennial ryegrass staggers. Investigations into the role of janthitrems in perennial ryegrass staggers are difficult as isolation of the compounds from the ryegrass is hindered by the inherent instability of these compounds. Therefore attempts were made to isolate janthitrems from an alternative source, allowing these janthitrem analogues to be used as surrogates for endophyte produced janthitrems. Analysis of a series of Penicillium janthinellum cultures revealed the presence of janthitrems in a number o

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30

Lowes, Wendy. "A molecular analysis of the factors affecting frost tolerance in Lolium perenne." Thesis, University of Newcastle Upon Tyne, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299054.

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31

Jupp, A. P. "Some effects of severe drought on the roots of Lolium perenne." Thesis, University of Bristol, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.375027.

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32

Dunaway, Chad W. "IN VITRO DIGESTIBILITY OF RYEGRASS SUPPLEMENTED WITH HAY, CORN, OR SOYBEAN HULLS." MSSTATE, 2009. http://sun.library.msstate.edu/ETD-db/theses/available/etd-10292009-093405/.

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An <i>in vitro</i> continuous culture rumen fermentation experiment was conducted to evaluate digestibility of annual ryegrass either fed alone or annual ryegrass supplemented with hay, corn, or soybean hulls. Nutrient disappearance of feedstuffs offered were not different (P > 0.05) as a percentage of the diet however there were differences (P < 0.05) in amounts of individual nutrients digested for each treatment. Ammonia-N concentrations of culture samples were less (P < 0.05) for vessels fed corn as a supplement however there was no difference (P > 0.05) among vessels fed either ryegrass al

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33

Malleson, Evelyn Rhoda. "Fishmeal supplementation to high producing Jersey cows grazing ryegrass or kikuyu pasture." Diss., Pretoria : [s.n.], 2008. http://upetd.up.ac.za/thesis/available/etd-06272008-130048.

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34

Neylan, David. "Operational modes for effective recovery of energy from ryegrass using anaerobic digestion." Thesis, University of Southampton, 2012. https://eprints.soton.ac.uk/210411/.

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In the United Kingdom a large proportion of agricultural land is laid to grass which is used for grazing and also harvested for animal feed. Grass is also potentially the crop most suited to energy production in the UK because of its high yield, low maintenance and suitability for growing under the climatic conditions. Anaerobic digestion is a potential technology for conversion of grass to energy and the current work looks at the design and operation of digester types that could be used to maximise the energy yield per hectare of crop and take advantage of the requirement to store harvested m

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35

Gooch, C. Bryan. "Competitive Effects of Perennial Ryegrass and Chewings Fescue on Bermudagrass Seed Establishment." Thesis, Virginia Tech, 1998. http://hdl.handle.net/10919/36678.

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Perennial ryegrass (Lolium perenne L.) is widely used as a fairway turf on golf courses throughout the transition zone. The transition zone represents the geographical areas between the temperate and subtropical climates, where neither warm season nor cool season grasses are well adapted. The late-spring establishment of seeded bermudagrass could potentially enhance summer quality of a perennial ryegrass fairway during periods of extreme summer stress. Studies were conducted over two years on both perennial ryegrass and Chewings fescue (Festuca rubra L. ssp. commutata Gaud.) areas to assess

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36

Kopec, David M., and Jeffrey J. Gilbert. "Response of Perennial Ryegrass under Desert Conditions to Applications of Sulfentrazone Herbicide." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2001. http://hdl.handle.net/10150/216356.

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Sulfentrazone was applied to perennial ryegrass turf as single applications at 0.125, 0.250 and 0.375 lb. AI/A, and split application combinations of 0.125/0.125, 0.250/0.250 and 0.375/0.125 AI/A. Respective treatments were applied on June 28 and July 31, 1996. Sulfentrazone caused a decrease in turfgrass color, which was most noticeable at the 0.375 lb. AI/A rate. Decreases in color were generally dependent on application rate. Sulfentrazone caused a slight "pocking" of the turf, which resulted from leaf twisting/cupping. This injury was most evident at seven days after the first application.

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37

Kopec, David M., D. P. Jensen, and Jeffrey J. Gilbert. "Ethephon Potential for Spring Transition of Perennial Ryegrass back to Common Bermudagrass." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2001. http://hdl.handle.net/10150/216367.

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Spring transition of ryegrass back to the underlying bermudagrass has become problematic for turfgrass managers in the Southwest. This is in part do to increased heat tolerance and shoot densities of newer ryegrass cultivars which predominate the market place. The chemical ethephon (Proxy for turf) was evaluated for use as a plant growth regulator (PGR) to enhance transition from perennial ryegrass to bermudagrass. Proxy was applied at either 5 or 10 ounce rates/1000 square ft, either before, during or after soil moisture stress was imposed on the overseeded turf. On the dates of July 6, 21, 1

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38

Baxter, Charles James. "The role of sucrose phosphate synthase in plant carbohydrate metabolism." Thesis, University of Sheffield, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.324445.

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39

Douglas, Meaghan Louise. "The nutritive characteristics of perennial ryegrass and implications for diet formulation for grazing dairy cows." Thesis, University of Sydney, 2020. https://hdl.handle.net/2123/23175.

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The dairy industry in south-eastern Australia is dominated by pasture-based feeding systems, where perennial ryegrass (Lolium perenne L.) is the most common pasture species grown. Pasture alone cannot provide optimal nutrition for high milk production; therefore, the majority of farmers feed concentrates such as cereal grain, protein supplements and dairy pellets to supplement the diet of grazing dairy cows. The challenge is to formulate an optimal supplementary ration that will complement the nutrients from pasture; thus, an understanding of the seasonal variation in nutritive characteristics

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40

Grimoldi, Agustín A. "Effects of arbuscular mycorrhiza and phosphorus supply on the growth of perennial ryegrass." [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=980529743.

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41

Clifford, Veronica Rose. "Mechanisms regulating the thermal acclimation of dark respiration in snow tussock and ryegrass." Thesis, University of Canterbury. Biological Sciences, 2007. http://hdl.handle.net/10092/1445.

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The aim of this research was to identify the mechanisms that underpin changes in respiratory capacity during acclimation to temperature. Dark respiration, enzyme activities and leaf ultrastructure were measured from ryegrass (Lolium perenne) in controlled environmental chambers and two species of native grass (Chionochloa rubra & C. pallens) growing at different altitudinal ranges on Mount Hutt, Canterbury, New Zealand. The overall hypothesis was that the changes in both mitochondrial numbers and enzyme activity underpin the greater respiratory capacity observed in response to decreasing te

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42

Devereaux, Alissa Corrine. "Transformation and overexpression of a MnSOD gene in perennial ryegrass (Lolium perenne L.)." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ61891.pdf.

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43

Brewer, Marin Talbot. "Effects of Biological Control and a Ryegrass Rotation on Rhizoctonia Disease of Potato." Fogler Library, University of Maine, 2003. http://www.library.umaine.edu/theses/pdf/BrewerMT2003.pdf.

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44

McKay, A. C. "Investigations to develop methods to control the nematode associated with annual ryegrass toxicity /." Title page, contents and summary only, 1985. http://web4.library.adelaide.edu.au/theses/09PH/09phm153.pdf.

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45

Pilbeam, C. J. "Comparative studies of populations of perennial ryegrass differing in their rate of respiration." Thesis, University of Reading, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.376256.

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46

Weedon, C. M. "Biosynthesis of indole-diterpenoids and other isoprenoids by the ryegrass endophyte, Acremonium loliae." Thesis, Imperial College London, 1988. http://hdl.handle.net/10044/1/47298.

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47

Morgan, Sarah Ann. "Relationships between fatty acids, lipids and other characteristics of perennial ryegrass (Lolium perenne)." Thesis, Aberystwyth University, 2015. http://hdl.handle.net/2160/faf97ebd-42b4-447d-bda5-71d41d14c031.

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Production and consumption of ruminant products is partly being held accountable for the increasing global challenges of human health and climate change. Also, increasing demand for food, feed and fuel is placing growing pressure on land availability. One area under investigation in response to these challenges is fatty acid content of forages. This thesis sets out to investigate the variation and relationships between fatty acids, lipids, chlorophyll and other nutritional aspects of perennial ryegrass. Additionally, it will investigate alternative methods to predict fatty acids in forage. The

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48

Hoiberg, Andrew Hansen. "Seeding rates of annual ryegrass that maximize turf cover when sown during traffic." [Ames, Iowa : Iowa State University], 2009. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1464213.

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49

Ferris, David Glen. "Evolutionary differentation in Lolium L. (Ryegrass) in response to the Mediterranean-type climate and changing farming systems of Western Australia /." Connect to this title, 2007. http://theses.library.uwa.edu.au/adt-WU2008.0040.

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50

Labuschagne, Johan. "Nitrogen management strategies on perennial ryegrass - white clover pastures in the Western Cape Province /." Thesis, Link to the online version, 2005. http://hdl.handle.net/10019.1/1385.

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