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一、棉花多枝改双枝试验山东省梁山县农业试验场为了研究解决棉花脱落问题,1958年在密植的基础上,进行了“多枝改双枝”试验。棉田为沙质壤土,深翻1.5尺,同时施基肥,冬灌保墒。品种为岱字15号,4月8日播种,行距7—8寸。4日23日定苗,株距3—3.5寸,每亩植株2万棵以上。当小苗长出4个真叶时(5月28日)开始捋去子叶,6个真叶时(6月7日),捋去1—2个下部真叶和腋芽。当棉苗出现
First, the cotton branches to change double branch experiment Liangshan County, Shandong Province Agricultural Experimental Field In order to study and solve the problem of cotton shedding, in 1958 on the basis of close planting, carried out “more branches to double branch” test. Cotton is sandy loam, deep down 1.5 feet, while the base fertilizer, winter irrigation soil moisture. Variety Dai No. 15, April 8 sowing, spacing 7-8 inches. Ding Miao on the 23rd on the 4th, spacing of 3-3.5 inches, more than 20,000 plants per mu. When the seedlings grow 4 true leaves (May 28) began to go to the cotyledons, 6 true leaves (June 7), go to 1-2 lower true leaves and axillary buds. When cotton seedlings appear