Results indicated that the best control effect and yield increase were obtained from the cultivation of earlysowing with plastic film mulching.
结果表明，早播覆膜防病增产效果最好，防效达827％，产量成倍增加。
2
The weight of roots and above ground parts and the seed cotton yield increased at irrigation, more fertilizer applied or earlysowing conditions.
灌水、重肥与早播处理棉株根重、地上部重及籽棉产量等均增加。
3
The weight of one hundred seeds, the content of starch and fat of earlysowing is higher than late sowing, but the content of water and protein is significantly lower than late sowing.