双季机械直播早籼稻品种的丰产性和稳产性

陈丽明,周燕芝,谭义青,吴自明,谭雪明,曾勇军,石庆华,潘晓华,曾研华

High and Stable Yield of Early Indica Rice Varieties with Double-Season Mechanical Direct Seeding

LiMing CHEN,YanZhi ZHOU,YiQing TAN,ZiMing WU,XueMing TAN,YongJun ZENG,QingHua SHI,XiaoHua PAN,YanHua ZENG

表8 不同产量类型直播早稻的分蘖特性

Table 8 Tillering characteristics of different types of direct seeding early rice

产量类型 Type 分蘖增长率 Increase rate of tillering (×104·hm-2·d-1) 分蘖下降率 Decrease of tilling (×104·hm-2·d-1) 高峰苗数 Number of peak tiller (×104·hm-2) 成穗率 Rate of effective ear (%) 高产 HY 13.62a 5.12b 610.67a 61.42a 中产 MY 12.97b 5.36a 577.03b 57.28b 低产 LY 12.26c 5.42a 557.26c 55.27c 与产量的相关系数 Coefficients 0.787** -0.283 0.818** 0.716**