播期对鄂中北地区不同类型粳稻产量、生育期及温光利用的影响

潘高峰, 汪本福, 陈波, 房振兵, 赵沙沙, 田永宏

Effects of Seeding Date on Yield, Growth Period and Utilization of Temperature and Sunshine of Different Types of Japonica Rice in North Central of Hubei Province

Pan Gaofeng, Wang Benfu, Chen Bo, Fang Zhenbing, Zhao Shasha, Tian Yonghong

表4 播期与不同类型粳稻产量方程

Table 4 Relation formula between seeding date and yield of different types of japonica rice

品种类型 Variety type Y=at2+bt+c Ymean (×103kg/hm2) Ymax (×103kg/hm2) Ymean/Ymax (%) a b c R2 早熟中粳EMMJ -0.096 -0.003 9.843 0.961* 8.13 9.84 82.58 中熟中粳MMMJ -0.176 0.003 9.437 0.950* 7.84 9.44 83.10 迟熟中粳LMJ -0.120 0.001 10.388 0.934* 9.10 10.39 87.60 籼粳杂交中熟中粳H-MMMJ -0.106 0.000 11.593 0.983** 10.26 11.59 88.47 籼粳杂交早熟中粳H-EMMJ -0.089 -0.002 11.428 0.985** 9.90 11.43 86.59