论文部分内容阅读
果园杂草以一年生、二年生杂草为主,多年生宿根性杂草也有一定发生量。一年生、二年生杂草有春草和夏草之分。春草在早春开始生长,5月达高峰,6月后枯黄。夏草自5月中下旬开始生长,7～8月达高峰,秋末枯死。果园使用克无踪化除两次,可以使果树不受杂草危害。克无踪用于果园除草,有很多优点。一是对一、二年生或多年生杂草的地上绿色部位均有杀伤效果,杂草死亡速度快,晴天施药后3天杂草即枯死。二是喷洒时落入土中的药物很快被土壤吸附并钝化,不会伤害果树根系。而幼年果园使用土壤处理剂,由于果树根系分布浅,极易受除
Orchard weeds to annual, biennial weeds, perennial root weeds also have a certain amount. Annual, biennial weeds and summer grass points. Spring grass begins to grow in early spring, reaching a peak in May and yellowing in June. Summer grass growth since mid to late May, reached a peak in July and August, late autumn dead. Orchard use grams without trace in addition to twice, you can make fruit trees from weed hazards. No trace for the orchard weeding, there are many advantages. First, on the green perennial weeds of perennial or perennial weeds have killing effect, weeds died quickly, 3 days after spraying sunny weed is dead. Second, the drugs that fell into the soil during spraying were quickly absorbed by the soil and passivated, and would not harm the roots of the fruit trees. The use of young orchards soil treatment agent, due to shallow root distribution of fruit trees, easily removed