Effects Of Soil Temperature And Humidity On Fatty Acid Content And Yield Of Peanut Under Mulching Cultivation In Shenyang

In this paper,peanut varieties(Huayu 52)with high oleic acid were selected as the research object.Three planting methods were set up.white film mulching,black film mulching and bare land planting.Peanut seeds were seeded on May 10,15 and 25,with nine treatments,each of which was repeated three times.At the same time,soil moisture,fatty acid content of peanut and peanut yield data were measured to explore the conditions of film mulching cultivation in Shenyang area The effect of soil temperature and humidity on fatty acid content and peanut yield.The conclusion is as follows:1.Mulching changed soil temperature and humidity.The overall soil temperature was as follows: white film treatment > black film treatment > bare land treatment.In different growth stages of peanut,the effect of plastic film mulching on soil temperature is also very different.The soil temperature of white film mulching is significantly higher than that of black film mulching and bare land mulching.The soil moisture of white film and black film treatment was significantly higher than that of bare land treatment.2.Mulching can increase the content of oleic acid in high oleic peanut seeds,reduce the content of linoleic acid in seeds,and increase the O/L value.To some extent,mulching increased the content of palmitic acid and arachidonic acid,decreased the content of arachidonic acid,behenic acid and pyroxylic acid,but did not reach a significant level.Mulching can improve the yield of high oleic acid peanut.Compared with the bare land,the yield of peanut covered with white film increased by 27.29~49.76%,and that of peanut covered with black film increased by 14.15~35.32%.3.Soil temperature has significant correlation with fatty acid content and peanut yield.The effect of soil temperature on the content of peanut oleic acid was the most obvious in the needle stage of peanut flowering.The soil temperature had a significant positive correlation with the content of peanut oleic acid in the growth stage.The soil temperature was in the range of 23.5~27?,which was conducive to the accumulation of oleic acid in peanut seeds.In different growth stages of peanut,the soil temperature of pod setting stage and sprouting stage is the main factor affecting peanut yield.The soil temperature of sprouting stage is in the range of 20~30?,the higher the soil temperature is,the higher the peanut yield is.The higher the soil temperature is,the higher the peanut yield is.This is the main reason why the mulching with white film can improve the peanut yield.4.There was significant correlation between soil moisture and fatty acid content and peanut yield.There was a significant positive correlation between soil moisture and oleic acidin flowering and pod setting stages.Within 10-50 days after anthesis,there was a significant correlation between soil moisture and oleic acid content.10-20 days after anthesis,soil moisture was in the range of 26~27%,and peanut oleic acid content was the highest.The highest content of peanut oleic acid was in the range of 34-36% of soil moisture 20-30 days after injection.30-40 days after the injection,the soil moisture was in the range of 22~24%,and the content of peanut oleic acid was the highest.The soil moisture in the period of flowering,pod setting and sprouting is the main factor affecting peanut yield.The soil moisture in the period of sprouting is in the range of 15~30%,peanut yield increases with the increase of soil moisture.Peanut yield increased with the increase of soil moisture in the range of 24~29%.The soil moisture was in the range of 26~31% at pod setting stage,and the yield of peanut increased with the increase of soil moisture.