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常熟县是粮棉連作,一年两熟地区。在棉花栽培上,一般有重施苗肥和蕾肥的习慣,但往往造成棉苗早封行、早衰,因而影响产量。为了探討棉花高产栽培技术,我們于1960、1964年两年进行了棉花苗期、蕾期和花鈴期的不同追肥时期的对比試驗。試驗地的土质、前作、基肥数量和质量、播种期都相同,追肥都是硫酸銨,定期覌察,分开收花,专門核产。1960年的試驗分四个处理,1964年的試驗分三个处理,其具体施肥数量,时
Changshu County is a continuous crop of cotton, cooked twice a year in the region. In cotton cultivation, there is a general habit of re-applying Miao Fei and Lei Fei, but often results in premature closure of cotton seedlings, premature aging, thus affecting the yield. In order to explore the cotton high-yielding cultivation techniques, we carried out comparative tests in different top-dressing stages of cotton seedling, budding and flower-boll in 1960 and 1964. Experimental soil, before, the number and quality of basal fertilizer, sowing time are the same, topdressing is ammonium sulfate, regular observation, separately received flowers, specialized nuclear production. The experiment in 1960 was divided into four treatments. The experiment in 1964 was divided into three treatments. The specific fertilization quantity, time