Letteratura scientifica selezionata sul tema "Effect of temperature on food crops"

Food security in India is often associated with the sufficiency of fine cereals (paddy and wheat) in the consumer basket, and the concentration of fine cereals in total cereal production and distribution in India makes climate change-related threats more severe. The pattern of changes in the climate variables is ascertained with monthly rainfall and temperature data for day and night. Findings suggest unambiguous increase in day temperature across reference months and regions. The increase in the night temperature is conspicuous in states, south of the Tropic of Cancer. Rainfall pattern indicates a shift in rain across months and reference regions. The susceptibility of fine cereals is studied by separately regressing productivity of paddy and wheat crops on climatic variables and time. The day temperature has an adverse effect on yield of both the crops; effect is significant during flowering and grain filling stage of paddy and wheat respectively. The night temperature is affecting yield of paddy adversely. The relationship between temperature and yield of crops is revealed with the log-linear specifications in the most cases. In Haryana, relationship between the above variables is quadratic. Time, irrespective of climate variables, remains an important explanatory variable for variation in the yield of crops.

Abstract Ukraine ranks among the largest global producers and exporters of a variety of agricultural commodities. Despite its importance, there is limited research on the effect of climate change on the future of Ukraine’s agricultural sector. We investigate how weather affects the yields of Ukraine’s five major crops: winter wheat, spring barley, sunflower, soybean, and corn. Using panel data on village-level surveyed crop yields and fine-scale weather data from 2004–2020, we estimate flexible statistical yield models to characterize the impact of temperature and precipitation changes on crop yields. A simple linear model of the effect of average temperature and precipitation on yields suggests warming is beneficial for all crops in Ukraine. However, a more flexible model of the temperature-yield relationship implies that the yields of two cold-season crops, winter wheat and spring barley, respond negatively to temperatures above 29 °C and 30 °C, respectively. We find no negative effects of high temperatures for the three warm-season crops. We conclude that both average temperature and exposure to high temperatures affect Ukrainian yields.

Climate change refers to weather changes that occur through time, either naturally or as a result of human activity. Climate change is now a worldwide issue, and Sudan is one of the developing countries that have suffered as a result of it. Sudan's economy is mostly based on agricultural, with Khartoum State playing a significant part in the country's economy. There are various important food crops grown in Khartoum, including wheat and sorghum. It is also known for the production of citrus fruits, particularly lemon, as well as onions, potatoes, beans, tomatoes, vegetables, fodder, and other crops. The results of this study showed that the annual highest maximum temperature was 40.8 °C in May and the lowest was in January 30 °C, while the minimum temperature ranged from 15.4 °C in January to 27.1 °C in June. For average temperature the highest degree was 34.3 °C in May and lowest was 22.7 °C in January. As for the precipitation, the highest was in August, reaching 27 mm, while the lowest was 3 mm in May, during the rainy months, which are between May and October only. As for the rainy days in the rainy months during the year, the highest value was 4 mm during July and August, while lowest was 1 mm in May, June and October, while it was 2 mm in the month of September. The highest humidity was 47% in August and the lowest was 12% in April. While for sunny days, the highest daylight hours were in June, when it was 11.7 hours, and the lowest hours were at 10.1 hours, and it was recorded in December. In this article, we specifically discussed how these climatic factors might impact the growth of important food crops in Khartoum. Climate change in Khartoum foretold that temperatures would rise to their highest point in the future, having a negative impact on agricultural crops. Due to low rainfall, drought stress on crops is also anticipated. The remedies to this issue are represented by integrated natural resource management and development, agricultural improvement and development, and the cultivation of species resistant to the impacts of climate change.

Rice (Oryza sativa L.) is the second most important food in the world after wheat. Most rice is now grown in areas where the temperature is higher than the optimum growing temperature (28/22°C); therefore, a further increase in average temperature or high temperature occurring in the sensitive phase of the crop can affect growth and yield. Clutter. For every 1°C increase in daytime maximum/night minimum temperature from 28°C/21°C to 34°C/27°C, rice yield decreases by 7% to 8%. Additionally, the benefits that crops derive from high atmospheric carbon dioxide concentrations must be lost due to warming. The thermal stability of cell membranes is thought to correlate well with yield performance. Temperature is important in photosynthesis, but too hot can cause reduced photosynthesis of leaves and reduced distribution of dry matter to shoots and roots. The disadvantage of temperature is not limited to the above-ground rice. The underground area is affected, if not more, by the flood, and the temperature of the soil changes due to the heat. Future increases in global temperatures threaten people worldwide who depend on crops for their health and food security. In the past, the stress of the crisis on rice production focused on the rice crop. This review highlights the importance of rice in the world, the effect of high temperature on the growth, quality, yield and properties of rice, and the need for future research.