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6 不同产量类型直播早稻产量及其构成

Table 6 Yield and composition of direct seeding early rice with different yield types

类型 Type 有效穗 Panicle number (×104·hm-2) 每穗粒数 Grains per panicle 总颖花量 Total spikelet (×104·hm-2) 结实率 Filled grain percentage (%) 千粒重 1000-grain weight (g) 实产 Grain yield (t·hm-2) 日产量 Daily yield (kg·hm-2· d-1) 高产 HY (n=4) 平均值 M 355.05a 137.59a 48908.47a 85.12a 27.37a 7.91a 80.78a 变幅 AV 347.54-371.43 1332.06-147.84 45897.16-54897.48 84.54-85.75 26.01-28.95 7.69-8.31 78.43-85.71 标准差 S 11.11 7.18 4125.39 0.50 1.21 0.27 3.37 变异系数 CV(%) 3.13 5.22 8.43 0.59 4.43 3.44 4.18 中产 MY (n=11) 平均值 M 344.92b 122.37b 41009.07b 84.95a 26.87b 7.13ab 71.82ab 变幅 AV 314.01-346.71 118.86-129.62 3719.51-44944.94 82.15-86.96 25.66-28.66 6.83-7.38 68.29-75.32 标准差 S 10.92 3.43 2346.10 1.79 0.96 0.21 2.50 变异系数 CV(%) 3.26 2.80 5.72 2.11 3.58 2.90 3.48 低产 LY (n=6) 平均值 M 307.93c 116.71c 35765.60c 85.27a 27.08ab 6.35b 63.79b 变幅 AV 303.05-311.33 113.25-118.24 34329.27-36783.06 803.03-87.45 24.84-28.23 6.22-6.52 59.23-67.26 标准差 S 3.04 2.01 956.73 1.71 1.27 0.13 2.59 变异系数 CV(%) 0.99 1.73 2.67 2.01 4.69 2.04 4.07