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棉花单位面积产量是由每亩株数,每株成铃数,单铃籽棉重及衣分所构成的,其中以铃重及成铃数的影响最大。在一般的情况下,棉花蕾铃脱落率在60％左右。在不同的条件下,铃重的变化幅度也较大。减少蕾铃脱落,提高铃重是棉花增产的有效途径。而气象条件又是影响棉花铃重及蕾铃脱落的重要因素之一。为了解它们之间的关系,我们进行了初步试验。现将试验结果报告如下:一、试验方法供试品种为沪棉204,采取分期播种与开花挂牌进行观察。分期播种于1981年4月20日至6月30日,每隔十天播一期。密度为5,000株/亩,小区面积0.01亩,每播期重复
Cotton yield per unit area by the number of plants per acre, the number of bolls per plant, bollworm seed weight and cotton seed constitute, of which the boll weight and the number of bolls most affected. Under normal circumstances, cotton buds shed about 60%. Under different conditions, the change of boll weight is also larger. Reduce the loss of buds, boll weight is an effective way to increase cotton production. The meteorological conditions are one of the important factors that affect the boll weight and the falling of the buds. To understand the relationship between them, we conducted a preliminary test. The test results are reported as follows: First, the test method for the test varieties for Hu Mian 204, to be staged seeding and flowering listed for observation. Staged sowing in April 20, 1981 to June 30, a broadcast every ten days. The density of 5,000 plants / mu, plot area of 0.01 acres, each sowing repeated