Comprehensive control and removal method for weeds in paddy fields

Abstract

The invention provides a comprehensive control and removal method capable of reducing the use amount of a herbicide in paddy fields and used for weeds in the paddy fields, and belongs to weed controland removal in the field of plant protection. By means of the comprehensive technology of taking a soil (green manure) deep ploughing-water slurry management-mechanical ploughing trinity agronomic andagricultural machinery weed control measure based on biological and ecological characteristics of dominant weeds in the paddy fields with the assistance of the guidance of ecological and economic control and removal thresholds of the main dominant weeds for reducing the use frequency of the herbicide and in combination with the compatibility of the herbicide and spray aids for reducing the use amount of the herbicide, the use frequency of the herbicide is reduced to 2-3 from 3-4 in the direct seeding paddy fields and reduced to 1-2 from 2-3 in the transplanting paddy fields, and the use amount of the herbicide per unit area is reduced by 30-70%. By means of the method, on the promise of not reducing the weed removal effect, the main dominant weeds in the current paddy fields are effectively controlled and removed, the generation of resistant weeds in the paddy fields is delayed, the input reduction and the efficiency improvement are achieved, and the method has obvious economic, ecological and social benefits.

Description

technical field [0001] The present invention relates to the control of weeds in the field of plant protection, in particular to a technology for comprehensive control of weeds in rice fields that can reduce the use of herbicides in rice fields. Background technique [0002] Weeds compete with rice for fertilizer, water, glory, and space, and spread diseases and insect pests. They are one of the important pests that affect rice yield and quality. According to the survey results, there are currently 143 species of weeds in paddy fields in my country, with an annual occurrence area of ​​about 20 million hm 2 . Although various measures are taken to control the harm of weeds in production, the impact of weeds on rice yield is still relatively serious at present, and weed damage has become a major obstacle to the stable and high yield of rice. [0003] The Ministry of Agriculture and Rural Affairs has clearly stated that by 2020, the use of pesticides should be zero-growth, and...

AI Technical Summary

Problems solved by technology

[0007] At present, domestic and foreign studies on the ecological and economic weeding threshold of farmland weeds have involved many crops and weed species, but most of them focus on a single weed type in a certain crop field, and study the mixture of two or more weeds. There are few ecological and economic thresholds for the interaction between weeds and rice, and further analysis of the effects of mixed weed density, symbiotic time with crops on crops, and reports on the relationship between various influencing factors are even scarcer.

Images