论文部分内容阅读
邗江县种植三麦约30万亩。自1978年起大面积发生倒伏,据统计,1979～1981年三年净倒伏面积分别占三麦面积的14.4％、9％和15％。起初,我们重点抓单项措施上出现的问题,如基本苗过多、施肥不合理、晚播春发等,并采取相应的措施,但倒伏仍然有增无减。 1980年后,进一步研究发现,同一年中产量从每亩500到800斤的各产量等级的田块,都有倒伏和不倒伏的;基本苗每亩14～32万,都有倒伏和不倒伏的;肥料水平每亩施纯氮22～40斤,也都有倒伏和不倒伏的。通过对100多块倒伏田块的调查,
Qijiang County planted about 30000 acres of wheat. Since 1978, large-scale lodging has occurred. According to statistics, the net lodging area in the three years from 1979 to 1981 accounted for 14.4%, 9% and 15% of the total. Initially, we focused on the problems that occurred on individual measures such as excessive basic fertilization, unreasonable fertilization and late spring sowing, and took corresponding measures, but the lodging was still increasing. After 1980, further research found that in the same year the plots yielding from 500 to 800 kilograms per mu in the same year all had lodging and not lodging; the basic seedlings had between 1,400,000 and 320,000 mus and had lodging and not lodging ; Fertilizer level per acre nitrogen fertilizer 22 ~ 40 pounds, also have lodging and not lodging. Through the investigation of more than 100 pieces of lodging plots,