Method for predicting spraying time of machine-harvested cotton defoliant

Abstract

The invention discloses a method for predicting spraying time of a machine-harvested cotton defoliating agent, which comprises the following steps of acquiring cotton varieties, sowing time, planting density, plant row configuration and topping time of a cotton field, and recording white flower opening time and boll opening time of a first fruit node of a first fruit branch of the cotton field through a listing method, measuring the boll weight, fiber quality, fiber length, fiber specific strength and micronaire value of the boll boll of the first fruit node of the first fruit branch, measuring the number of the cotton fruit branches, simulating and analyzing the influence of different defoliating agent spraying time on the yield and fiber quality by utilizing the acquired information, combining with future weather and climate prediction and utilizing a cotton functional structure model Cotton XL, furthermore, the optimal spraying time of the cotton field defoliating agent is accurately predicted. According to the method, the cotton yield and the fiber quality which can be obtained under different defoliating agent spraying schemes can be given, and the method has important significance for guiding cotton production to select the optimal defoliating agent spraying time.

Description

technical field [0001] The invention relates to the technical field of cotton spraying, in particular to a method for predicting the spraying time of a machine-picked cotton defoliant. Background technique [0002] In recent years, the cotton industry in Xinjiang has developed rapidly. Chemical defoliation is one of the important links in mechanized harvesting. The quality of its effect directly affects the quality and efficiency of mechanical harvesting, and also affects the quality and yield of cotton. Spraying the defoliation and ripening agent too early will increase the proportion of immature cotton bolls and fibers; delaying the spraying of the defoliation and ripening agent will increase the risk of encountering frost and bad weather, resulting in withered leaves and increased seed cotton production. Impurity rate. Reasonable spraying of defoliation and ripening agent will not only produce good defoliation and ripening effect, but also reduce the negative impact on y...

AI Technical Summary

Problems solved by technology

[0004] At present, the determination of the spraying time of the defoliant is mainly based on the production experience in the past years, and the approximate time range of the spraying of the defoliant is determined. This method is universal, but sometimes there are deviations from the standard to the specific variety of the specific plot.

In addition, under different environmental conditions (such as temperature, light, precipitation, etc.), the cotton yield and fiber quality of the same variety are not the same, and the existing methods cannot quantitatively reflect the impact of different spraying times on yield and quality, so it is impossible to Accurately predict the best time to apply defoliants

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