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一、试验设计棉花塑膜营养钵育苗在大面积生产上增产效果显著。但苗床管理用工多、塑膜用量大,加上支架,成本较高。为了探索提高经济效益,节本省工,培育壮苗的途径,1982年改用地膜覆盖营养钵育苗。试验设五个处理:(1)地膜(厚度0.015毫米)平盖营养钵育苗,4月5日播种;(2)地膜平盖营养钵,4月10日播种;(3)地膜平盖营养钵,4月15日播种;(4)地膜架棚营养钵育苗,4月5日播种;(5)普通塑膜架棚营养钵,4月5日播种。每处理苗床长8米,不设重复。每钵播棉子一粒。品种为南通棉5号。(4)(5)两处理苗床管理方法与常规同;(1)(2)(3)处理在出苗后即开洞放苗。试验于6月9日移栽大田。二、试验结果1、温度变化。自4月6日起逐日三次
First, the experimental design Cotton plastic film nutrition bowl nursery in a large area production significantly increased yield. However, many seedbed management, plastic film dosage, with the stent, the higher the cost. In order to explore ways to improve economic efficiency, save time and labor and cultivate strong seedlings, we switched to cultivation of seedlings in nutrient bowl in 1982. The experiment set five treatments: (1) plastic film (thickness of 0.015 mm) flat cover nutrition bowl nursery, sowing April 5; (2) plastic cover flat nutritional bowl, April 10 sowing; , April 15 sowing; (4) plastic shelves shed nutrition bowl nursery, April 5 sowing; (5) ordinary plastic shelves nutrition bowl, sown on April 5. Seedbed per treatment 8 meters long, no duplication. Each bowl of cotton seed one. Nantong cotton varieties on the 5th. (4) (5) Two treatment seedbed management methods and practices the same; (1) (2) (3) Treatment of seedlings in the hole after emergence. The experiment transplants the field on June 9. Second, the test results 1, temperature changes. Three times daily since April 6