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近年来,随着科学技术的不断发展,农村产业结构的进一步调整,农村经济和劳动力的价值有了新的变化,使农业劳动力大量转向工副业。农田草害越来越严重,草害已成为影响农业生产的障碍。因此,化学除草剂在稻田上的应用,受到了广大农民的欢迎。稻田化学除草技术已被浙江省列入“七·五”期间重点农技成果推广项目。但目前省内外推广的稻田化学除草施药方法单一,仅限于插秧后(3～5天)施药法。由于施药方法单一,因而受施药时间、天气等因素的影响,使稻田化学除草大面积应用,受到了一定的限制。
In recent years, with the continuous development of science and technology and the further adjustment of the rural industrial structure, new changes have taken place in the value of the rural economy and the labor force, which has led to a large shift in the agricultural labor force to the industrial and sideline industries. Farmland is becoming more and more serious. Grass damage has become an obstacle to agricultural production. Therefore, the application of chemical herbicides in rice fields has been welcomed by the majority of farmers. The chemical weeding technology in paddy fields has been listed as a promotion project for key agro-technology achievements during the “July 5th” period in Zhejiang Province. However, the method of chemical weed control applied in paddy fields in the province and abroad is single, and it is limited to the application method after transplanting (3 to 5 days). Because of the single application method, the application of chemicals, such as the application time and weather, has caused a certain limitation on the large-scale application of chemical weeding in rice fields.