摘要
在种植密度7万株/hm2条件下设置40、50、60、70cm等行距和40+80cm大小垄5种种植样式进行试验,以50cm等行距种植产量最高,较60、70和40+80cm处理增产5.15%～5.77%;40cm等行距种植产量次之;40+80cm大小垄与40、60、70cm等行距种植产量无显著差异。高密度夏玉米最佳种植样式应为50cm左右等行距,最优行株比约为1.821∶。行距缩小,公顷粒数、千粒重和株高整齐度呈提高趋势,在一定程度上能弥补高密度种植对穗粒数和千粒重的负影响。5种种植样式的次生根层数与条数无显著差异。
In comparison with treatments of row spacing of 40 cm, 50 cm, 60 cm, 70 cm and 40 ＋ 80 cm, the treatment of row spacing of 50 cm ranked first with increase of 5.15% - 5.77% in yield, and 40 cm was followed under about 70 000 plant/ha planting condition. There was no significant difference among row spacing of 40 cm, 40 ＋ 80 cm, 60 cm and 70 cm. The optimum planting pattern was 50 cm row spacing with ratio of row space to plant space of 1.82 ： 1 for highly-densed summer maize. There was a trend of increase in grain number per hectare, grain weight and plant height uniformity with row spacing reduced, which compensated to some extent the negative effect on grain number per ear and 1 000-grain weight. There was no significant difference for layer and number of secondary roots among treatments.
出处
《玉米科学》
CAS
CSCD
北大核心
2006年第6期122-124,共3页
Journal of Maize Sciences
基金
国家粮食丰产工程(2004BA520A07-06-04)
河北省科技厅项目(05220144)
关键词
夏玉米
行距
种植样式
Summer maize
Row spacing
Planting pattern
