长江中下游地区常规中熟粳稻氮效率综合评价及高产氮高效品种筛选

刘秋员,周磊,田晋钰,程爽,陶钰,邢志鹏,刘国栋,魏海燕,张洪程

Comprehensive Evaluation of Nitrogen Efficiency and Screening of Varieties with High Grain Yield and High Nitrogen Efficiency of Inbred Middle-Ripe Japonica Rice in the Middle and Lower Reaches of Yangtze River

LIU QiuYuan,ZHOU Lei,TIAN JinYu,CHENG Shuang,TAO Yu,XING ZhiPeng,LIU GuoDong,WEI HaiYan,ZHANG HongCheng

表7 不同产量-氮效率类型的产量构成因素

Table 7 Yield components of different grain yield and nitrogen efficiency types

年份 Year 产量-氮效率类型 GYNET 指标 Trait 有效穗数 Number of effective panicles (×104 hm-2) 千粒重 1000-grain weight (g) 穗粒数 Spikelet per panicle 结实率 Percentage of filled grains (%) 2017 Ⅰ 变幅 Range 313.50-410.25 24.15-29.88 94.55-136.08 83.55-93.44 变异系数 CV (%) 7.21 5.63 8.85 3.21 平均值 Mean 363.20a 26.81a 111.18a 88.77a Ⅱ 变幅 Range 317.34-429.58 24.00-29.13 83.32-128.31 82.43-95.61 变异系数 CV (%) 6.61 5.01 9.48 3.25 平均值 Mean 369.49a 26.46a 102.36b 88.99a Ⅲ 变幅 Range 302.58-467.52 20.60-29.38 75.38-112.30 84.52-95.77 变异系数 CV (%) 11.03 7.04 9.54 3.43 平均值 Mean 359.82a 25.86a 97.31c 90.80a 2018 Ⅰ 变幅 Range 286.46-386.83 24.15-30.17 95.95-134.88 88.93-97.03 变异系数 CV (%) 7.84 5.91 8.99 2.43 平均值 Mean 347.67a 27.09a 112.31a 94.31a Ⅱ 变幅 Range 308.83-425.53 23.98-30.06 90.77-119.47 90.22-97.92 变异系数 CV (%) 7.46 6.83 8.42 2.48 平均值 Mean 350.85a 26.69a 103.94b 94.42a Ⅲ 变幅 Range 268.51-456.36 20.78-29.65 74.19-126.02 86.84-98.56 变异系数 CV (%) 9.88 6.61 10.70 2.85 平均值 Mean 352.78a 26.26a 97.14c 94.93a