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1 试验地土壤基本理化性状
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Table 1 Physical and chemical characteristics of the experimental soil
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土层深度
Soil depth (cm) | pH | 容重
Bulk density
(g·cm-3) | 有机质
Organic matter
(g·kg-1) | 全氮
Total N
(g·kg-1) | 硝态氮
NO3--N
(mg·kg-1) | 速效磷
Available P
(mg·kg-1) | 速效钾
Available K
(mg·kg-1) | | 2016 | 2017 | 2016 | 2017 | 2016 | 2017 | 2016 | 2017 | 2016 | 2017 | 2016 | 2017 | 2016 | 2017 | | 0-20 | 8.44 | 8.39 | 1.38 | 1.36 | 6.24 | 5.67 | 0.55 | 0.68 | 8.85 | 7.45 | 25.77 | 27.38 | 101.07 | 142.33 | | 20-40 | 8.31 | 8.32 | 1.60 | 1.51 | 6.25 | 5.24 | 0.53 | 0.57 | 4.44 | 3.17 | 28.37 | 36.51 | 69.97 | 106.07 | | 40-60 | 8.37 | 8.32 | 1.58 | 1.54 | 4.07 | 4.03 | 0.34 | 0.42 | 3.79 | 2.39 | 37.00 | 33.06 | 62.07 | 122.50 | | 60-80 | 8.29 | 8.37 | 1.53 | 1.61 | 5.43 | 4.65 | 0.49 | 0.51 | 4.65 | 3.58 | 23.64 | 29.85 | 107.90 | 87.83 | | 80-100 | 8.33 | 8.30 | 1.45 | 1.40 | 8.58 | 5.10 | 0.58 | 0.54 | 4.34 | 4.45 | 44.22 | 30.76 | 118.60 | 132.59 |
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