氮素用量对膜下滴灌甜瓜产量以及氮素平衡、硝态氮累积的影响
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薛亮,马忠明,杜少平,冯守疆,冉生斌
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Effects of Application of Nitrogen on Melon Yield, Nitrogen Balance and Soil Nitrogen Accumulation Under Plastic Mulching with Drip Irrigation
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XUE Liang,MA ZhongMing,DU ShaoPing,FENG ShouJiang,RAN ShengBin
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表3 不同处理对氮素吸收利用的影响
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Table 3 Effects of different treatments on nitrogen absorption and nitrogen use efficiency of muskmelon
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处理
Treatment | 果实氮吸收量
N absorption (kg·hm-2) | 氮收获指数
NHI (%) | 氮素吸收利用率
NRE (%) | 氮素农学效率
NAE (kg·kg-1) | 氮素生理利用率
NPE (kg·kg-1) | | 2016 | 2017 | 2016 | 2017 | 2016 | 2017 | 2016 | 2017 | 2016 | 2017 | | N0 | 40.02d | 43.93c | 76.54 | 80.54 | – | – | – | – | – | – | | N60 | 73.55c | 75.33bc | 83.00 | 84.59 | 60.53a | 50.04a | 68.06a | 68.10a | 112.44c | 136.09b | | N120 | 92.50b | 87.50b | 83.73 | 84.58 | 48.48b | 46.65ab | 66.14a | 65.31a | 136.43b | 140.01a | | N180 | 106.24a | 102.68a | 85.20 | 85.29 | 40.22c | 39.59b | 61.44a | 56.61ab | 152.76a | 142.98a | | N240 | 104.02a | 101.25a | 82.27 | 81.94 | 30.90d | 30.78c | 46.97b | 44.42b | 152.01a | 141.26a |
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