从1950年至1957年,我们曾在前浙江省农业科学研究所萧山棉麻试验场进行了一系列的棉花肥料试验,初步明确了氮肥的增产作用在于能够增加单株结铃数和提高单铃籽棉重等方面;在氮肥的施用时期上,如果追肥用量较低时,则以始花期施用最为重要等等。至于不同化学氮肥的增产效果、氮素追肥的适宜用量、施肥 From 1950 to 1957, we conducted a series of experiments on cotton fertilizers at the Xiaoshan Cotton and Cotton Maize Experimental Station of Zhejiang Academy of Agricultural Sciences. It was initially clarified that the increasing effect of nitrogen fertilization is to increase the number of bolls per plant and increase the number of single bolls Seed cotton weight and so on; in the period of application of nitrogen fertilizer, if the amount of fertilizer is low, then the first flowering is the most important and so on. As for the effects of different chemical nitrogen fertilizers, the appropriate amount of nitrogen top dressing, fertilization