北方粳稻最优产量氮肥阈值周年变化及其影响因素分析

陈玥, 宫亮, 金丹丹, 张鑫, 李波, 邹晓锦, 隋世江, 叶鑫, 刘艳

Annual Variation of Nitrogen Fertilizer Threshold for Optimal Yield of Northern Japonica Rice and Its Influencing Factors Analysis

Chen Yue, Gong Liang, Jin Dandan, Zhang Xin, Li Bo, Zou Xiaojin, Sui Shijiang, Ye Xin, Liu Yan

表3 氮表观平衡条件下各因素对推荐施氮量周年变化的影响分析

Table 3 Effects of various factors on annual changes of recommended N application rate under N apparent equilibrium condition

参数估算Parameter estimation 项目 Item 方差分析Variance analysis 变量 Variable 参数 Parameter 标准差 Standard deviation 自由度 Degree of freedom 平方和 Sum of squares 均方 Mean square F P y 3.94 8.89 模型Model 5 1502.77 300.55 58.21 0.0001 x1 2.63 4.26 误差Error 15 77.46 5.16 x2 1.80 7.47 总和Sum 20 1580.23 x3 -0.57 8.14 均方根Root mean square 2.27 x4 1.28 5.51 均值Mean value 1.29 x5 -4.13 2.26 变异系数Coefficient of variation 175.36