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在江南油菜种植区,油菜有多种栽植形式,以稻茬油菜为例,常见的有免耕移栽油菜和免耕直播油菜两种,采用不同的播栽方式,田间发生的杂草也会各有差异,在开展化学除草时,应分别针对不同情况合理用药除草,才能收到较好的防除效果。1.稻田免耕移栽油菜。其杂草的发生呈现以下特点:一是早。晚稻断水后杂草即开始出土,油菜移栽前已出现第一个出草高峰,油菜移栽后表土层未出土的杂草种子开始萌发出土,形成第二个出草高峰,杂草数量多于翻
In the rapeseed planting area in Jiangnan, rape has a variety of planting forms, with rice stubble rape as an example, common tillage transplanting rape and no-tillage live rape two, using different planting methods, field weeds will There are differences in the chemical weeding, they should be rationalized for different situations, weeding in order to receive better control effect. 1. Paddy transplanting rape without tillage. The occurrence of its weeds show the following characteristics: First, early. Late weeds began to unearthed after the late rice, rapeseed has emerged before the first peak of the grass, rapeseed top soil unearthed weed seeds began to germinate, forming a second rush hour, the number of weeds In turn