中国农业科学 ›› 2019, Vol. 52 ›› Issue (4): 690-700.doi: 10.3864/j.issn.0578-1752.2019.04.010
收稿日期:
2018-07-30
接受日期:
2018-11-13
出版日期:
2019-02-16
发布日期:
2019-02-27
通讯作者:
马忠明
作者简介:
薛亮,E-mail: 基金资助:
XUE Liang1,MA ZhongMing2(),DU ShaoPing2,FENG ShouJiang1,RAN ShengBin2
Received:
2018-07-30
Accepted:
2018-11-13
Online:
2019-02-16
Published:
2019-02-27
Contact:
ZhongMing MA
摘要:
【目的】针对灌区膜下滴灌甜瓜栽培施氮不合理的问题,通过系统分析膜下滴灌条件下不同施氮量对甜瓜产量、土壤硝态氮累积及氮素吸收和平衡的影响,为河西灌区膜下滴灌甜瓜合理施用氮肥提供理论依据。【方法】试验采用膜下滴灌施肥模式,设置5个施氮水平:0(N0)、60(N60)、120(N120)、180(N180)、240 kg·hm -2(N240),在苗期、伸蔓期、膨大期和成熟期测定土壤剖面硝态氮含量,并结合成熟期产量和氮素吸收量,分析不同氮素用量对甜瓜产量、品质以及氮素平衡和土壤中硝态氮分布、累积的影响。 【结果】在施氮量为180 kg·hm -2时甜瓜商品瓜产量达到较高值,果实吸氮量和氮收获指数达到最大,甜瓜氮素吸收利用效率、氮素农学效率和氮素生理利用率变幅分别为39.59%—40.22%、56.61—61.44 kg·kg -1和142.98 —152.76 kg·kg -1;不同深度土壤NO3 --N随施氮量的增加而增加,但同一处理中土层越深NO3 --N含量越低;收获后NO3 --N主要累积在0—40 cm土层,占试验监测土壤范围(0—100 cm)的46.74%—51.84%;施氮量与甜瓜吸氮量、硝态氮残留量和氮素表观损失量呈显著正相关,甜瓜吸收量占氮输出量的41.27%—41.36%,氮素残留量占42.62%—43.41%,表观损失占15.32%—16.02%。 【结论】在河西沙漠绿洲灌区甜瓜膜下滴灌种植中,氮素施入量以180 kg·hm -2为宜,有利于甜瓜氮素吸收利用能力保持在较高水平,降低氮素损失,达到氮素收支动态平衡以及高产优质高效的生产目的。
薛亮,马忠明,杜少平,冯守疆,冉生斌. 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[J]. 中国农业科学, 2019, 52(4): 690-700.
XUE Liang,MA ZhongMing,DU ShaoPing,FENG ShouJiang,RAN ShengBin. Effects of Application of Nitrogen on Melon Yield, Nitrogen Balance and Soil Nitrogen Accumulation Under Plastic Mulching with Drip Irrigation[J]. Scientia Agricultura Sinica, 2019, 52(4): 690-700.
表1
试验地土壤基本理化性状"
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 |
表2
不同处理对甜瓜产量、干物质累积和品质的影响"
处理 Treatment | 单瓜重 Average fruit weight (kg) | 商品率 Commodity rate (%) | 商品瓜产量 Yield (kg·hm-2) | 干物质量 Biomass (kg·hm-2) | 可溶性固形物含量 Soluble solid (%) | |||||
---|---|---|---|---|---|---|---|---|---|---|
2016 | 2017 | 2016 | 2017 | 2016 | 2017 | 2016 | 2017 | 2016 | 2017 | |
N0 | 1.88d | 1.89d | 76.73 | 75.30 | 28866d | 28478d | 5632d | 5501d | 12.05 | 11.56 |
N60 | 1.99c | 2.00c | 82.75 | 81.37 | 32949c | 32563c | 6121c | 6068c | 12.64 | 12.81 |
N120 | 2.14b | 2.16b | 85.95 | 84.02 | 36803b | 36315b | 6726b | 6581b | 13.15 | 13.06 |
N180 | 2.31a | 2.28a | 86.37 | 84.76 | 39925a | 38668a | 7291ab | 6996ab | 14.24 | 14.59 |
N240 | 2.33a | 2.30a | 86.09 | 84.55 | 40138a | 39138a | 7433a | 7256a | 14.47 | 13.98 |
表3
不同处理对氮素吸收利用的影响"
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 |
表4
不同处理对0—100 cm土壤剖面氮素平衡的影响"
氮输入量N input | 氮输出量 N output | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
施氮量 N rate (kg·hm-2) | 起始NO3--N Initial NO3--N | 矿化量 Mineral N | 总输入量 Total input | 作物带出 Melon uptake | 残留NO3--N Residual NO3--N | 表观损失 Apparent loss | |||||||
2016 | 2017 | 2016 | 2017 | 2016 | 2017 | 2016 | 2017 | 2016 | 2017 | 2016 | 2017 | 2016 | 2017 |
0 | 0 | 77.42 | 61.18 | 37.40 | 55.95 | 114.82e | 109.91e | 52.29c | 51.66d | 62.53e | 58.25e | 0 | 0 |
60 | 60 | 77.42 | 61.18 | 37.40 | 55.95 | 174.82d | 169.91d | 88.61b | 81.68c | 79.54d | 82.09d | 6.67d | 6.13d |
120 | 120 | 77.42 | 61.18 | 37.40 | 55.95 | 234.82c | 229.91c | 110.47b | 107.64b | 105.46c | 101.60c | 18.89c | 20.67c |
180 | 180 | 77.42 | 61.18 | 37.40 | 55.95 | 294.82b | 289.91b | 124.69a | 122.93a | 124.31b | 128.87b | 45.82b | 38.11b |
240 | 240 | 77.42 | 61.18 | 37.40 | 55.95 | 354.82a | 349.91a | 126.44a | 125.53a | 137.81a | 144.03a | 90.57a | 80.34a |
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