一、播期与蕾鈴脫落的关系 由於播種期的不同,對棉花蕾鈴脫落的影響也就不同。較早期播種的棉花,一般的現蕾數增多,而蕾鈴脫落相反的减少了(表1)。如1956年的試驗,其脫落率:3月7日播種的是45.87％,3月31日播種的是60.91％,而4月30日播種的是65.54％。在1957年的试驗里也得到了同樣論證。在4月12日及其以後播種的,脫落增多,而在3月19日及其以前播種则保苗較差。 First, the relationship between sowing date and shedding of buds due to the different sowing time, the impact of the fall of cotton bolls will be different. Older seeding cotton generally increased the number of buds, while the number of buds dropped to the opposite (Table 1). As in the 1956 test, the rate of shedding was 45.87% on March 7, 60.91% on March 31, and 65.54% on April 30. In 1957 the trial also got the same argument. Seeds that were planted on and after April 12 increased shedding, whereas those planted on or before March 19 were poorly seed-saplings.