Key cultivation method for improving heat resistance of Oryza sativa L., and application of key cultivation method in improvement of heat resistance of Oryza sativa L.

Abstract

The invention discloses a key cultivation method for improving heat resistance of Oryza sativa L., and application of the key cultivation method in improvement of the heat resistance of the Oryza sativa L.. The cultivation method comprises four aspects, including variety selection, reasonable thick planting, moisture management and plant growth regulator application. A heat-resistant high-yield Oryza sativa L. variety is a technology success key, variety characteristics are combined to carry out the reasonable thick planting and a space layout, a population structure is regulated, and the temperature of a population canopy is lowered; in addition, during the whole growth period of the Oryza sativa L., field moisture is scientifically managed and controlled, dry-wet alternation moisture management is carried out for multiple times to improve moisture utilization efficiency to prevent the population canopy from generating plant diseases and insect pests due to overhigh humidity, and meanwhile, the temperature of the population canopy is lowered; and in addition, the plant growth regulator is sprayed duly to reduce hurt for Oryza sativa L. pollen grain fertility, pollen germination, pollen tube elongation and/ or grain filling by the high temperature, and transportation of an assimilation substance is accelerated. The cultivation method disclosed by the invention coordinates factors, including varieties, technologies and the like, the problem of Oryza sativa L. yield reduction due to high temperature weather can be solved, and the high yield and the stable yield of the Oryza sativa L. are guaranteed.

Description

technical field [0001] The invention relates to the field of rice cultivation, in particular to a key cultivation method for improving the heat resistance of rice and the application of the method in improving the heat resistance of rice. Background technique [0002] The reproductive growth period of rice is sensitive to high temperature. During the flowering period, encountering high temperature weather with a maximum temperature above 38°C for 2-3 hours will affect the formation of spikelet fertility; when the high temperature weather with the maximum temperature exceeding 38°C lasts for 5-7 days, The output will drop by about 10%. If the highest temperature exceeds 40°C and lasts for more than 15 days, the output will decrease by 20-30% or even fail. Therefore, preventing or reducing rice heat damage loss is one of the important measures to ensure food security in my country. [0003] The current countermeasures to deal with the formation of high-temperature weather on ...

AI Technical Summary

Problems solved by technology

Although it can reduce high temperature heat damage to a certain extent, it is still difficult to meet the needs of production under the background of global warming

Because some varieties are more resistant to high temperature in the flowering period, but some varieties are relatively insensitive to high temperature in the filling period, which is difficult for varieties

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