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Exposure to short periods of heat stress can decrease flower production during the period, but plants generally recover and produce more flowers later. There is an increase in the rate of flower production following the episode of heat stress, and the cumulative number of flowers produced at high temperature (>35° C) is greater than produced at the optimum temperature of 28° C. Peg numbers are affected by both high day and night temperatures. There is a decrease in the formation of pegs and pods at temperatures above 33/23°C. 

An increase in day temperature reduces peg number at the rate of 0.9 plant per degree Celsius above an optimum temperature of 28° C. An increase in night temperature from 22° C to 28° C reduces peg number from 7.7 to 5 per plant. In contrast, soil temperature does not affect peg numbers, but influences the conversion of pegs to developing pods and pod numbers. Decreases in flower and peg numbers reduce the number of pods formed. Air temperature above the optimum of 28° C reduces pod numbers. The decrease in peg and pod numbers above the optimum temperature is generally related to a decrease in fertility of flowers. 

This is due mainly to the negative effects of high temperature on viability of pollen grains and lower pollen production. Groundnut flowers are most sensitive to high temperature stress 9 days prior to flowering and at the time of flowering. Stress prior to flowering decreases the viability of pollen grains, while stress at flowering decreases the ability of pollen grains to germinate and complete fertilization. 

Once the flower is fertilized its sensitivity to temperature is relatively lower. Effect on dry matter accumulation, pod growth and yield - The amount of dry matter accumulated in groundnut per unit input (light, water and nutrients) determines the efficiency of the production system. https://www.ozstarmachinery.com/ OZSTAR has the best roasters of various capacities to give you the perfectly roasted peanuts! We also provide additional equipment for flavouring and seasoning the nuts. OZSTAR also provides additional flavoring and seasoning equipment for nuts We manufacture different capacity to suit demand. This stainless steel is of high quality and can be controlled from the touch screen control panel.

 

Crop growth rate, which indicates the rate of conversion of inputs into dry matter, is influenced by temperature. Temperatures above or below an optimum value reduce dry weight or biomass accumulation. An optimum temperature of 28° C has been identified for dry matter accumulation. Temperatures 4° C above or below this optimum reduce dry weight.

Soil temperature is also important in determining groundnut yield as the pod growth occurs in the ground. Plant dry weight decreases with an increase in air and/or soil temperature. Pod yield is usually correlated positively with total dry matter accumulation and, therefore, any effect of temperature on total dry matter accumulation will affect pod yield.