关中地区麦田杂草危害状况及防除对策

为摸清目前关中地区麦田杂草种类、分布、感染危害情况,历时3个月对关中地区4市25个县(区)麦田杂草感染危害状况进行全面调查。结果发现,关中地区麦田杂草不仅种类繁多,分布广泛,而且危害普遍严重,其中以播娘篙、猪殃殃、荠菜和节节麦分布最广,危害最严重,平均每平方米分别是93株、84株、21株和19.5株,最多样方分别是1 0421、246、352和256株/m2。因此,麦田杂草防除,应在一定的轮作与土壤耕作的基础上,把各项除草措施综合在一起,以求高效、低投入。

Situation of the wheat weed and preventive countermeasures in Guanzhong wheat region

Winter wheat is the prime food crop in Guanzhong area of Shaanxi Province.Weed disease is one of the main factors that limit the amount and stability of the wheat yield.In order to figure out the species and distribution/infection situation of the cornfield weed in this area,it took 3 months to carried out one thorough investigation which covered 25 counties in Guanzhong area.And the result indicated that weeds in Guanzhong cornfield are not only various but also widely distributed,which lead to serious harm.Among the weeds the most popular and harmful ones are celery wormwood,cleavers,shepherd's-purse and oat grass,with the average coverage in 1 m2 being 93,84,21 and 19.5 plants,and the densest coverage can reach 1 042,1 246,352 and 256 plants/m2.Therefore,several weeding measures should be combined based on certain rotating farming and soil tillage,to reach the high efficiency and low cost.