控水增密模式对杂交籼稻减氮后产量形成的调控效应

李敏, 罗德强, 江学海, 蒋明金, 姬广梅, 李立江, 周维佳

Regulations of controlled irrigations and increased densities on yield formation of hybrid indica rice under nitrogen-reduction conditions

Min LI, De-Qiang LUO, Xue-Hai JIANG, Ming-Jin JIANG, Guang-Mei JI, Li-Jiang LI, Wei-Jia ZHOU

表10 控水增密对水稻减氮后干物质积累量及收获指数的影响

Table 10 Effects of controlled water management and increased density on dry matter accumulation under nitrogen reductions in rice

栽培模式Cultivation model 干物质积累量Dry matter accumulation (t hm-2) 收获指数 Harvest index 减氮 Nitrogen reduction 控水增密 Water-density treatment 拔节期 Elongation stage 抽穗期 Heading stage 成熟期 Maturity stage N0 W0D0 (CK) 4.8±0.2 12.6±0.4 22.6±0.9 0.532±0.005 N-10% W0D0 4.2±0.2 11.6±0.4 21.0±1.2 0.526±0.015 N-10% W0D1 4.7±0.2 13.1±0.5 22.7±1.2 0.521±0.016 N-10% W0D2 5.0±0.2 13.4±0.4 23.1±0.9 0.481±0.005 N-10% W0D3 5.2±0.1 13.9±0.1 23.8±0.9 0.400±0.011 N-10% W1D1 4.3±0.1 12.3±0.2 22.2±1.0 0.563±0.001 N-10% W1D2 4.6±0.2 12.7±0.2 22.4±1.2 0.502±0.013 N-10% W1D3 4.9±0.2 13.0±0.2 23.3±0.6 0.416±0.022 N-10% W2D1 4.2±0.1 12.1±0.3 21.6±0.8 0.565±0.020 N-10% W2D2 4.4±0.1 12.3±0.2 22.3±0.9 0.507±0.011 栽培模式Cultivation model 干物质积累量Dry matter accumulation (t hm-2) 收获指数 Harvest index 减氮 Nitrogen reduction 控水增密 Water-density treatment 拔节期 Elongation stage 抽穗期 Heading stage 成熟期 Maturity stage N-10% W2D3 4.7±0.1 12.7±0.2 22.9±0.7 0.459±0.011 N-10% W3D1 3.8±0.1 11.8±0.3 18.8±0.9 0.567±0.035 N-10% W3D2 4.2±0.2 12.2±0.2 20.8±1.1 0.495±0.017 N-10% W3D3 4.4±0.1 12.6±0.2 21.1±0.4 0.467±0.014 N-30% W0D0 3.6±0.1 9.1±0.3 16.6±1.0 0.547±0.041 N-30% W0D1 3.8±0.1 9.9±0.2 16.8±0.5 0.530±0.010 N-30% W0D2 4.0±0.2 10.7±0.3 18.9±0.4 0.482±0.007 N-30% W0D3 4.5±0.2 11.5±0.4 19.7±0.2 0.441±0.016 N-30% W1D1 3.4±0.0 9.4±0.4 16.7±0.7 0.544±0.013 N-30% W1D2 3.7±0.2 10.2±0.3 18.8±0.6 0.525±0.006 N-30% W1D3 4.3±0.1 11.0±0.6 19.5±0.3 0.471±0.002 N-30% W2D1 3.2±0.1 9.5±0.3 16.5±0.3 0.532±0.010 N-30% W2D2 3.6±0.1 10.0±0.3 19.0±0.2 0.530±0.011 N-30% W2D3 3.9±0.2 10.3±0.4 19.4±0.3 0.473±0.005 N-30% W3D1 3.0±0.1 9.1±0.4 15.6±0.3 0.527±0.016 N-30% W3D2 3.3±0.3 9.4±0.3 18.5±0.1 0.484±0.014 N-30% W3D3 3.6±0.1 9.9±0.4 19.1±0.3 0.460±0.008 LSD0.05 0.23 0.52 1.22 0.026