Comprehensive evaluation method for drought resistance of rice at bud stage on basis of grading coefficients

Abstract

The invention discloses a comprehensive evaluation method for drought resistance of rice at a bud stage on the basis of grading coefficients and relates to the technical field of agricultural production. According to the method, a grading method is improved, a mathematical method with standard deviations as grading standards is established, it is proposed that the grading coefficients are used asnew comprehensive evaluation indexes, and the problems are solved that there is high subjectivity in existing grading methods due to artificial division, correspondingly evaluation results have no objectivity, the scientificity is reduced, the universality is not high, grading evaluation values are greatly affected by the number of the indexes, and thus the accuracy of the evaluation results is affected; the drought resistance of the rice can be more precisely evaluated, and a basis is provided for screening the rice with the drought resistance.

Description

technical field [0001] The invention belongs to the technical field of agricultural production, and in particular relates to a method for comprehensively evaluating drought resistance of rice bud stage based on grading coefficients. Background technique [0002] Rice is the most important food crop in my country and even in the world. Its production water consumption ranks first among all kinds of crops, accounting for about 70% of agricultural water consumption. According to statistics, the entire growth period of rice consumes about 8884.4m of water 3 / hm 2 , of which the field evacuation amounted to 72.31%. Under the traditional flood irrigation cultivation method, rice production consumes a lot of water, but the water use efficiency is not high, resulting in the waste of water resources and exacerbating the contradiction between agricultural production and water shortage. Studies have pointed out that drought has become the main abiotic stress factor hindering the pro...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above problems, the present invention provides a method for comprehensive evaluation of drought resistance of rice bud stage based on grading coefficient. The mathematical method of the grading standard proposes the grading coefficient GC as a new comprehensive evaluation index, which solves the problem that the existing grading method is artificially divided, and there is a strong subjectivity, which leads to the loss of objectivity of the evaluation results and reduces the scientific nature of the calculation. The versatility is not strong, and the grading value is greatly affected by the number of indicators, which leads to the problem of affecting the evaluation results

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