夏玉米不同部位干物质临界氮浓度稀释曲线的构建及对产量的估计
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苏文楠, 解君, 韩娟, 刘铁宁, 韩清芳
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Construction of critical nitrogen dilution curve based on dry matter in diffe rent organs of summer maize and estimation of grain yield
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SU Wen-Nan, XIE Jun, HAN Juan, LIU Tie-Ning, HAN Qing-Fang
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表4 相对籽粒产量(RY)的RMSE, n-RMSE和R2的值(根据2016-2017年不同时期的氮营养指数(NNI)和累积氮亏(AND)预测)
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Table 4 Values of RMSE, n-RMSE and R2 for prediction of relative yield (RY) from nitrogen nutrition index (NNI), and accumulated nitrogen deficit (AND), respectively, at different growth stages using data obtained in 2016 and 2017
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部位 Organ or plant | 品种 Cultivar | 参数 Parameter | 氮亏缺Accumulated nitrogen deficit (AND) | 氮营养指数Nitrogen nutrition index (NNI) | V3 | V6 | V8 | V12 | VT | V3 | V6 | V8 | V12 | VT | 叶片 Leaf | 正大12 | RMSE | 0.08 | 0.08 | 0.09 | 0.03 | 0.05 | 0.08 | 0.12 | 0.08 | 0.05 | 0.05 | Zhengda 12 | n-RMSE | 9.10 | 9.04 | 10.41 | 3.51 | 5.23 | 8.85 | 13.65 | 8.39 | 5.72 | 5.31 | | | R2 | 0.90 | 0.89 | 0.86 | 0.98 | 0.96 | 0.90 | 0.76 | 0.91 | 0.95 | 0.96 | | 陕单609 | RMSE | 0.11 | 0.06 | 0.08 | 0.05 | 0.05 | 0.08 | 0.07 | 0.07 | 0.03 | 0.05 | | Shaandan 609 | n-RMSE | 12.40 | 6.86 | 8.69 | 5.81 | 5.40 | 8.80 | 8.12 | 7.90 | 2.82 | 5.11 | | | R2 | 0.83 | 0.93 | 0.88 | 0.95 | 0.95 | 0.88 | 0.90 | 0.90 | 0.98 | 0.96 | 茎 Stem | 正大12 | RMSE | 0.11 | 0.10 | 0.10 | 0.06 | 0.06 | 0.08 | 0.10 | 0.06 | 0.06 | 0.06 | Zhengda 12 | n-RMSE | 11.83 | 10.66 | 10.96 | 7.16 | 6.67 | 8.81 | 11.40 | 6.46 | 6.79 | 6.49 | | | R2 | 0.83 | 0.85 | 0.84 | 0.93 | 0.94 | 0.90 | 0.82 | 0.94 | 0.94 | 0.94 | | 陕单609 | RMSE | 0.10 | 0.10 | 0.06 | 0.04 | 0.04 | 0.06 | 0.08 | 0.05 | 0.04 | 0.03 | | Shaandan 609 | n-RMSE | 11.00 | 11.12 | 6.35 | 3.92 | 4.18 | 6.46 | 9.14 | 5.57 | 4.74 | 3.16 | | | R2 | 0.87 | 0.81 | 0.94 | 0.97 | 0.97 | 0.93 | 0.87 | 0.95 | 0.96 | 0.98 | 植株 Plant | 正大12 | RMSE | 0.15 | 0.09 | 0.07 | 0.06 | 0.04 | 0.10 | 0.09 | 0.06 | 0.06 | 0.04 | Zhengda 12 | n-RMSE | 17.09 | 9.87 | 7.81 | 6.11 | 4.63 | 10.70 | 9.97 | 7.03 | 6.57 | 4.38 | | | R2 | 0.65 | 0.88 | 0.92 | 0.95 | 0.97 | 0.86 | 0.88 | 0.94 | 0.94 | 0.97 | | 陕单609 | RMSE | 0.12 | 0.10 | 0.08 | 0.04 | 0.07 | 0.08 | 0.09 | 0.04 | 0.03 | 0.04 | | Shaandan 609 | n-RMSE | 13.47 | 11.25 | 8.32 | 4.65 | 7.85 | 9.24 | 9.42 | 4.91 | 3.03 | 4.93 | | | R2 | 0.80 | 0.86 | 0.92 | 0.97 | 0.93 | 0.91 | 0.90 | 0.97 | 0.99 | 0.97 |
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