摘要
适期播种的覆膜玉米苗期根系发达,株高与穗位较低,叶面积指数与光合势适中,穗粒重较高。初步认为,哈尔滨地区覆膜玉米最佳播种期为4月10日～24日。
The sowing date of corn under protected condition with plastic sheeting was studied.The results showed that the root system of corn sowed in optimum date developed more extensively at early growing stage,the plant height and ear position were sower than those lowed earlier or later.LAI and photosynthetic potential were more appropriate and both the grain number and grain weight per ear were increased.It was suggested that the period from April 17 to 24 be the optimum sowing dates for plastic sheeting used to cover corn in Harbin region
关键词
玉米
播种期
覆膜栽培
corn
plastic shecting
sowing datc
LAI(lcaf arca index)
photosynthetic efficiency
