冬牧70黑麦复种水稻诱草灭草效果试验初报

Preliminary Report on Effect of Inducing and Eliminating Grass on Rice after Planting Dongmu 70 rye in Winter Pasture

连续2年在贺兰县、灵武市、青铜峡市、吴忠市利通区进行冬牧70黑麦复种水稻诱草灭草效果试验,结果表明,冬牧70黑麦复种水稻诱草控草效果十分明显,能有效地减轻水稻田杂草危害。复种田稗草密度较本田和对照田分别减少84.8%和90.3%,多度分别减少15.4%和55.1%;复种田三棱草密度与本田相当,但比对照田减少33.2%,多度分别减少70.8%和80.6%。冬牧70黑麦复种水稻可减少化学除草剂的使用,提高水稻品质,尤其是在有机水稻栽培中可作为一项重要技术加以推广应用。

The experiments on effect of inducing and eliminating grass on rice after planting Dongmu 70 rye in winter pasture were carried out for 2 consecutive years in Helan County,Lingwu City,Qingtongxia City and Wuzhong City.The results showed that the implementing inducing and eliminating grass on rice after planting Dongmu 70 rye in winter pasture was effective to control weeds and could significantly reduce weed hazards.Compared with the spring-crop field and control,the density of multiple cropping barnyard grass decreased by 85.5%and 92.9%;and the abundance decreased by 12%and 55.1%.Compared with the spring-crop field and control,the density of multiple cropping Pinellia ternata decreased by 37.7%and 38.0%,respectively;and the abundance decreased by 74.0%and 80.9%.The implementation of multiple cropping rice after winter rye could reduce the use of chemical herbicides,improve the paddy quality and could be a key technology in the cultivation of organic rice cropping.