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青浦县生板(免耕)油菜种植面积由1982年的26.5%扩大到1987年的93.1%,但油菜生长过程中免耕栽培的杂草危害比耕翻的严重,杂草与油菜争水、争肥、争光和争空间的矛盾较为突出,前期影响了油菜正常生长,易感染病虫害,后期普遍出现早衰症状,成为推广油菜简易栽培的一大障碍。为继续发挥免耕油菜的优越性,必须解决免耕栽培的草害问题。近年来,我们开展了多点小面积试验,应用化学除草剂,特别是绿麦隆在油菜免耕栽培上的最佳除草时间、适宜用量以及最恰当的使用方法等,边示范、边推广。一、试验示范推广过程1982年从事油菜免耕栽培以来,针对主要杂草“看麦娘”、“繁缕”等的危害情况,受三麦应用绿麦隆除草效果的启发,开展对生板油菜使用绿麦隆的探索。沈巷乡新胜一队通过小区试验,获得良好的
In Qingpu County, the area of planted (no-till) rapeseed expanded from 26.5% in 1982 to 93.1% in 1987. However, the no-tillage weeds harmed more than the tillage, The conflicts between fighting for fertilizer, winning glory and contending for space are more prominent. The early rape affected the normal growth of rape and became susceptible to pests and diseases. Premature senility symptoms generally appeared in later period, which became a major obstacle to the promotion of simple rape cultivation. To continue to play the superiority of no-till rape, we must solve the problem of no-tillage cultivation. In recent years, we have carried out a number of small area trials, the use of chemical herbicides, especially the green wheat in tillage rape tillage optimal herbicidal time, the appropriate amount and the most appropriate use of methods, while demonstrating, while promoting. First, the pilot demonstration of the promotion process In 1982 engaged in rapeseed tillage since the main weeds, “Amanda”, “chickweed” and other hazards, inspired by the three wheat application of Mellong weeding effect, to carry out the raw board Exploration of rape using Chloroflavin. Shen Xiang Xiang Xin wins a team through the district test, get good