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

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

薛亮,马忠明,杜少平,冯守疆,冉生斌

Effects of Application of Nitrogen on Melon Yield, Nitrogen Balance and Soil Nitrogen Accumulation Under Plastic Mulching with Drip Irrigation

XUE Liang,MA ZhongMing,DU ShaoPing,FENG ShouJiang,RAN ShengBin

表4 不同处理对0—100 cm土壤剖面氮素平衡的影响

Table 4 Effects of different treatments on soil N balance of melon in 0-100 cm layers

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