论文部分内容阅读
棉花在8月中、下旬,吐絮前后,要注意作好“三防”。 1.防早衰 早衰在各棉区发生的频率很高,大大降低了产量和纤维品质。预防的具体技术是前期作好全苗、壮苗措施,促根系伸展;中期加强水肥管理、作好抗旱追肥;后期促根保叶,主要措施是“白露(节)停水,秋分(节)停药(治虫)”。后期根吸收力减弱,主要靠及早根外追肥,在50公斤水中,加尿素100～400克,磷酸二氢钾100克、802或特多收17毫升,5-7天1次,共喷2～3次,可
Cotton in mid-August, late, before and after the vomit, should pay attention to make “three defenses.” 1. Premature senility Premature senility prevalent in the cotton zone frequency is high, greatly reducing the yield and fiber quality. Specific techniques to prevent early seedlings, strong seedlings measures to promote root extension; mid-term to strengthen water and fertilizer management, make drought top dressing; late to promote root Paul leaves, the main measures are “white dew (section) no water, Stopping (pest control) ”. After the root absorptance weakened, mainly by early root top dressing, in 50 kg of water, plus urea 100 ~ 400 grams, 100 grams of potassium dihydrogen phosphate, 802 or more received 17 ml, 5-7 days 1, a total of 2 ~ 3 times, yes