牧草替代控制紫茎泽兰关键技术

替代种植是控制紫茎泽兰蔓延和危害的主要途径之一。与一般草地建植方法相比较,利用牧草替代控制紫茎泽兰的主要技术在于:在紫茎泽兰种子成熟前,采用人工或机械挖除、晒干后就地焚烧方式清除紫茎泽兰地表植被;采用豆禾混播,禾本科宜选用非洲狗尾草或鸭茅,豆科选用白三叶,并适度增加播种量;建植当年宜采用低施肥水平,不宜施用氮肥;替代种植初期适时拔除紫茎泽兰萌发幼苗。

Planting displacement techniques for Eupatorium adenophorum in pasture

Planting pasture is one of the methods available in controlling crofton weeds(Eupatorium adenophorum Spreng.) in grasslands.Different from the traditional pasture-planting methods,the main techniques for planting pasture to replace crofton weeds were as follows:(1) the crofton weeds should be dug and burned out before the seeds ripened;(2) mixed sowing of Setaria sphacelata with Dactylis glomerata.Trifolium repens may be used,but the sowing rate should be properly increased due to the effect of allelopathy by crofton weeds;(3) less fertilizer should be used,and no nitrogenous fertilizers should be used in the first year;(4)remove the seedlings of crofton weeds in time for the first year.