增施穗氮肥缓解水稻穗分化期高温伤害的生理机制研究

闫娜, 谢可冉, 高逖, 胡秋倩, 崔克辉

Physiological Mechanism of Increased Panicle Nitrogen Fertilizer Application on Alleviating High-Temperature Damage during the Rice Panicle Initiation Stage

Yan Na, Xie Keran, Gao Ti, Hu Qiuqian, Cui Kehui

表1 幼穗分化期高温下增施穗氮肥对水稻产量及其构成因素的影响

Table 1 Effects of the increased panicle nitrogen application rates on rice yield and its components under high temperature treatment during panicle initiation stage

品种 Variety 氮处理 N treatment 温度处理 Temperature treatment 产量（g/株） Yield (g/plant) 有效穗数（/株） Effective panicle number (per plant) 穗粒数 Spikelet per panicle 结实率 Seed-setting rate (%) 千粒重 1000-grain weight (g) LYPJ LN CK 25.2±0.9a 10.7±0.3a 116.6±2.6a 85.5±3.1a 23.7±0.4a HDT 15.9±1.0c 10.3±0.7a 112.8±9.6a 59.3±6.1c 22.9±0.6a HN CK 25.8±1.3a 11.7±0.7a 116.4±10.0a 82.5±3.5a 23.3±0.6a HDT 19.4±0.8b 12.0±0.6a 100.8±0.7a 72.7±0.8b 22.1±0.2a 方差分析Analysis of variance 温度 (T) *** ns ns *** * N处理 (N) * * ns * ns T×N ns ns ns * ns SY63 LN CK 27.9±1.1b 10.0±0.0b 130.2±3.8a 82.0±3.0a 26.2±0.7a HDT 27.6±1.4b 11.3±0.7b 117.6±6.0ab 77.5±0.7a 26.9±0.5a HN CK 34.8±2.5a 15.7±0.7a 109.5±8.6ab 77.6±1.1a 26.2±0.8a HDT 31.7±1.3ab 14.7±0.3a 105.1±6.3b 77.3±1.2a 26.7±0.8a 方差分析Analysis of variance 温度 (T) ns ns ns ns ns N处理 (N) * *** * ns ns T×N ns * ns ns ns