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一、稻田的化学除草技术 (一)秧田除草:以除稗草为主,旱育苗秧田兼有阔叶杂草。可用2.4—D除杀。 1、除草醚土壤处理:每亩用40％除草醚0.8—1.0斤(25％。l—1.5斤)或7％杀草丹2.5—3斤。加水150斤喷洒秧床面。 (1)播前喷药、播后复土,对水稻安全。但如复盖物有草籽,效果差些;(2)播后复土再喷药,杀草效果好,缺点是秧苗出土,遇土面药层,芽鞘被烧成焦斑,但无妨,几天后幼苗可恢复正常。
First, chemical weeding technology in rice fields (A) weeding grass seedbed: In addition to barnyard grass, dry nursery seedling and broad-leaved weeds. Available 2.4-D kill. 1, weeding ether soil treatment: 40% with 40% of each weed ether 0.8-1.0 kg (25% .l-1.5 kg) or 7% kill grass Dan 2.5-3 kg. Add water 150 kg spray seedling bed surface. (1) Spraying before sowing, returning to earth after sowing, safe for rice. However, if covered with grass seeds, the effect is worse; (2) After sowing soil and then spraying, grass killing effect is good, the disadvantage is the seedlings unearthed, in case of soil layer of medicine, bud sheath burned into a focal spot, but no harm After a few days the seedlings can return to normal.