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我场地处中高纬度,属寒温带大陆性气候,自然特点是春旱夏涝秋霜早,以生产小麦、大豆为主。耕地多属丘陵岗地,由于施有机肥少,土壤由中性逐渐趋向酸性。一、氟乐灵的除草效果和药害 1978年我们在1万多亩大豆田里施用氟乐灵除草。药剂是从意大利进口的48％乳剂,每公顷有效用量1公斤,用拖拉机联动弥雾式喷撒装置喷施,5月上旬喷后耙地(拌土)1—2次,隔2—3天播种。施药后对燕麦草和稗草灭草效果最好,不少地块可以不用人工除草,只用机械中耕。但部分地段喷药后与播种时间相隔太短,拌土又不及
My field at high latitudes, is a cold temperate continental climate, the natural characteristics of the spring and summer flood autumn frost early to produce wheat and soy-based. Arable land mostly hilly land, due to organic fertilizer less, the soil tends to acidic from neutral. First, the effect of tripholide herbicides and pesticides In 1978, we were in the more than 10,000 acres of soybean field trifluralin weeding. Pharmacy is imported from Italy, 48% of the emulsion, the effective amount of 1 kilogram per hectare, with the tractor linkage Mist spray device sprayed in early May after the rake spray (mix soil) 1-2 times, every 2-3 days sowing. Herbicide and barnyard grass after weeding the best weeding effect, many plots can not be manually weeding, only mechanical cultivator. But part of the spray after spraying and planting time is too short, mix less than