北方粳稻最优产量氮肥阈值周年变化及其影响因素分析
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陈玥, 宫亮, 金丹丹, 张鑫, 李波, 邹晓锦, 隋世江, 叶鑫, 刘艳
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Annual Variation of Nitrogen Fertilizer Threshold for Optimal Yield of Northern Japonica Rice and Its Influencing Factors Analysis
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Chen Yue, Gong Liang, Jin Dandan, Zhang Xin, Li Bo, Zou Xiaojin, Sui Shijiang, Ye Xin, Liu Yan
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表1 土壤无机氮含量与施氮量的相关性
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Table 1 Correlation of soil inorganic N content and N application kg/hm2
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年份
Year | 线性加平台
Linear plus plateau | R2 | 饱和施氮量
Saturated N
application | 最高无机氮含量
Highest inorganic
nitrogen content | 推荐施氮量
Recommend
N application | 推荐施氮量下的无机氮含量
Inorganic nitrogen content
of recommend N application | 2011
| y=0.477x-15.925 x≤287.35
y=121.15 x>287.35 | 0.957
| 287.35
| 121.15
| 211.64
| 85.03
| 2012
| y=0.475x-12.832 x≤289.71
y=124.78 x>289.71 | 0.970
| 289.71
| 124.78
| 205.02
| 81.87
| 2013
| y=0.509x-19.599 x≤284.85
y=125.39 x>284.85 | 0.976
| 284.85
| 125.39
| 218.84
| 88.46
| 2014
| y=0.487x-15.384 x≤287.77
y=124.76 x>287.77 | 0.988
| 287.77
| 124.76
| 207.39
| 83.00
| 2015
| y=0.537x-24.482 x≤277.77
y=124.68 x>277.77 | 0.978
| 277.77
| 124.68
| 216.65
| 87.42
| 2016
| y=0.561x-28.84 x≤274.42
y=125.11 x>274.42 | 0.979
| 274.42
| 125.11
| 218.07
| 88.09
| 2017
| y=0.58x-33.094 x≤273.61
y=125.6 x>273.61 | 0.983
| 273.61
| 125.60
| 220.36
| 89.19
| 2018
| y=0.549x-24.753 x≤274.34
y=125.86 x>274.34 | 0.983
| 274.34
| 125.86
| 220.61
| 89.31
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