不同缓/控释氮肥对春玉米氮素吸收利用、 土壤无机氮变化及氮平衡的影响
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侯云鹏, 李前, 孔丽丽, 秦裕波, 王蒙, 于雷, 王立春, 尹彩侠
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Effects of Different Slow/Controlled Release Nitrogen Fertilizers on Spring Maize Nitrogen Uptake and Utilization, Soil Inorganic Nitrogen and Nitrogen Balance
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YunPeng HOU, Qian LI, LiLi KONG, YuBo QIN, Meng WANG, Lei YU, LiChun WANG, CaiXia YIN
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表3 玉米产量、氮素总积累量、氮素利用效率与不同生育时期土壤无机氮含量的相关性 |
Table 3 The correlations of maize yield, the total nitrogen accumulations, nitrogen utilization efficiency and inorganic N contents in soil during different growth periods |
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年份 Year | 项目 Item | 土壤无机氮含量 Soil inorganic N content | 苗期 Seedling | 拔节期 Jointing | 大喇叭口期 Belling | 开花期 Flowering | 灌浆期 Filling | 成熟期 Maturing | 2014 | 氮素总积累量Total accumulative N | 0.115 | 0.326 | 0.610** | 0.900** | 0.891** | 0.870** | | 产量 Yield | 0.062 | 0.179 | 0.476* | 0.888** | 0.869** | 0.823** | | 氮素当季回收率NRE | -0.873** | -0.730** | -0.634* | 0.766** | 0.718** | 0.692** | | 氮素农学利用率NAE | -0.768** | -0.663** | -0.574* | 0.638* | 0.591* | 0.567* | | 氮素偏生产力NPFP | -0.815** | -0.639** | -0.542* | 0.672** | 0.659** | 0.623* | 2015 | 氮素总积累量Total accumulative N | 0.174 | 0.224 | 0.527* | 0.904** | 0.824** | 0.791** | | 产量 Yield | 0.082 | 0.119 | 0.491* | 0.843** | 0.803** | 0.786** | | 氮素当季回收率NRE | -0.834** | -0.806** | -0.596* | 0.668** | 0.593* | 0.585* | | 氮素农学利用率NAE | -0.793** | -0.724** | -0.565* | 0.695** | 0.631* | 0.615* | | 氮素偏生产力NPFP | -0.815** | -0.770** | -0.552* | 0.687** | 0.623* | 0.531* |
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