甘薯化学除草地膜覆盖少耕栽培法效应

EFFECT OF MINIMUM TILLAGE CULTIVATION ON SWEET POTATO PRODUCTION WITH HERBICIDE APPLICATION AND PLASTIC FILM GROUND SHELTER

秋植甘薯,采用檀前喷施除草剂土壤处理后,覆盖塑料薄膜的配套少耕栽培法,能提高土壤温度,保持土壤稳定水分与结构,并有效地防治杂草,甘薯植株生长旺盛。结果薯块重与植株总重均显著增产,节省劳力,经济效益较好。 仅采用各种化学除草剂处理的效应,有抑制杂草生长作用,能省工,提高工效,但与人工除草处理比较,甘薯产量差异不显著。

The author was able to raise soil temperature, preserve soil water, maintain soil structure, control weeds effectively, keep plant growing thrivingly and save labour when growing sweet potato in autumn with a minimum tillage cultivation technique in which the ground was covered with plastic films after the soil had been treated with weedkiller before planting. As a result,the yield of tuber and the total weight of sweet potao plant increased significantly and a good economic benefit was achieved.In another trial,control of weeds,saving of labour and increase in labour efficiency could be achieved by only applying herbicides. However,no significant yield difference between manual weeding and herbicide application was shown.