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灵武县新华桥公社华二大队每年种稻面积3,000亩左右,约占耕地面积60％。稻田杂草以稗草、三棱草为主;野慈菇、鸭舌草、乍毛等也有发生,但不严重。在大面积使用除草剂之前,由于该大队薅草工作抓得紧,没有形成草荒现象,但薅草的用工量相当大。如1970年,华二七队稻田薅草用工每亩平均3个,二队每亩平均6个,草多的田还薅得不净。由于稻田薅草用工多,也影响了其它作物的精耕细作以及多种经营的开展。从各类型稻田来看,三棱草发生重的主要是在湖田(如杨关湖);稗草则无论在连作稻
Xinhua Bridge commune in Lingwu County Hua second brigade each year about 3,000 acres of paddy area, accounting for about 60% of arable land. Paddy weeds to barnyard grass, triangular grass dominated; wild arrowhead, Monochoria, hairy hair, but also occurred, but not serious. Before the large-scale use of herbicides, the grasshoppers did not form grass shortage because of the grasping efforts of the grasshoppers, but the amount of labor used by the grasshoppers was quite large. For example, in 1970, an average of three laborers per mu was employed for the two-and-seven-team paddy field, and an average of six for the second team per acre was reached. Due to the large amount of labiatae used in paddy fields, the intensive cultivation of other crops and the diversification of operations have also been affected. From all types of paddy fields, the occurrence of Sanxiancao heavy is mainly in Hutian (such as Yanguan Lake); barnyard grass in both continuous cropping rice