The Effect Of Fertilization On Peanut Canopy Temperature And Its Application In Peanut Production Practice

Continuous warming of global climate and frequent appearance of extremely hot weather are seriously threatening human agricultural production, which result in significant loss in crop yield and serious decline in quality. It is imminent to protect crop against high temperature hazards. Crop canopy temperature(plant temperature) can be reduced through fertilization strategy in the same microclimate conditions thereby decreasing or avoiding the hazards of high temperature on crop,nevertheless, so far, the related research have involved only a few crops(such as wheat, rice, maize). It is unclear about the mechanism of the effect of fertilization on crop canopy temperature.In this study, peanut as a very important crop for the national economic development is used as the research object. dabaisha and Lu hua11 th for the study. Set no fertilizer(CK, 0 kg / hm2), low fat(222 kg /hm2), in fertilizer(543 kg / hm2) and high fertilizer(952 kg / hm2) 4treatments.The Correlation analysis of physiological traits and canopy temperature showed that there was a lower canopy temperature applied high-N than CK, and those treatments applied middle- and low-N had a higher canopy temperature from pod setting period to middle of pod filling period and a lower canopy temperature in late period of pod filling than CK. The chlorophyll and soluble protein contents, and NR, POD andindicated the canopy temperature of different treatments applied N fertilizer was closely related to chlorophyll and soluble sugar contents,and NR and POD activities. Thus, application of N fertilizer can change can canopy temperature and physiological characteristics of peanut and there is a close relationship between them, and application of high-N fertilizer is propitious to anti-high temperature cultivation of peanut.The Correlation analysis of ecological traits and canopy temperature showed that Nitrogen reducing canopy temperature to a certain extent.Effects of nitrogen application rate on field microclimate there are obvious rules can be found. In favor of increased nitrogen fertilization between strains reduce humidity, reduce light intensity between strains,and it changes the intensity increases with the amount of nitrogen. Effects of nitrogen application rate on the temperature of the strains between the performance of the state under the lowest temperature in fat.The Correlation analysis between photosynthetic characteristics and canopy temperature showed that Nitrogen application significant increased the rate of photosynthesis, the more nitrogen, the more quantity of photosynthesis in the certain range. Nitrogen application also changed the temperature of canopies, the temperature of canopies was rise at early CAT activities of different treatments applied N fertilizer all demonstratedhigh-N>middle-N>low-N>CK, and the MDA content showed that high-N<middle-N<low-N<CK. The results of correlation analysiscanopy temperature and yield characteristics. The results from this experiment indicate that canopy temperature maybe an efficient index for the rapid monitoring of peanut nutrient stress.The main objectives of this study are:(i) to offer theoretical guidance for peanut cultivation practices of anti-high temperature, high yield and quality, and(ii) to provide a theoretical basis for revealing the mechanism of canopy temperature difference of the same genotype peanut variety in different fertilizing conditions.growth stage, while reduce at late growth stage. Nitrogen application can improve the character of photosynthesis of LuHua 11, the more Nitrogen, the more photosynthesis rate, transpiration rate, stomatal conductance,while lower concentration of CO2.The Correlation analysis between yield traits and canopy temperature showed that nitrogen application could reduce canopy temperature of peanut, and the higher the nitrogen application, the lower the canopy temperature. The increase of NP, FP, WP and yield with increasing application of nitrogen, but the decrease with increasing canopy temperature. There is a close relationship among nitrogen level,...