Method for relieving photosynthetic property loss of wheat under high-temperature stress

Abstract

The invention discloses a method for relieving photosynthetic property loss of wheat under high temperature stress. The method comprises the following steps of after wheat blooms for 5 days, spraying exogenous NO sodium nitropussidi and salicylic acid to the leaf surface of the wheat until the front and back surfaces of leaves are wet, and keeping for 4 days once every day, wherein the treatment concentrations of the exogenous NO sodium nitropussidi and the salicylic acid are respectively 0.5 mmol / L and 0.1 mmol / L. Inhibition of the high-temperature stress on wheat growth can be effectively relieved, and finally the effect of relieving wheat yield loss is achieved.

Description

technical field [0001] The invention relates to a method for alleviating crop high temperature stress, in particular to a method for alleviating the loss of photosynthetic performance of wheat under high temperature stress. Background technique [0002] Wheat is one of the main food crops in my country, and its yield is directly related to the development of the national economy. Wheat is a cool-loving crop, and the optimum growth temperature is 15-20°C. According to research, when the average temperature of the grain filling stage of wheat is higher than 15°C, it is not conducive to the formation of grain weight, and the yield will decrease by 1%-4% for every 1°C increase (Chen et al.2014). As one of the main wheat producing areas in my country, the Huanghuai wheat region in China is not only an area with significant climate warming, but also staged high temperature and humid weather often occurs in the later stages of wheat growth, and the daily average temperature from h...

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Problems solved by technology

[0004] However, most of the research results on the effects of exogenous substances on crop heat resistance come from the laboratory level (hydroponics, artificial incubator method), and there is still a lack of data support based on the growth of crops throughout the growth period.

On the other hand, existing studies have mostly observed the crop tolerance response within a relatively short period of time after pesticide application. The heat tolerance produced under such conditions may be difficult to use in practice because the high temperature is "sudden", that is, it cannot Accurately predict the coming time of high temperature and other environmental stress

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