doi:10.16178/j.issn.0528-9017.20201219

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References 20

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年份	处理	有效穗/ m^-2	每穗粒数	结实率/ %	千粒重/ g	产量/ (kg·hm^-2)
2016	无氮对照(CK)	210 c	132 a	96.0 ab	25.2 a	6 034 b
	常规施肥	235 bc	147 a	98.4 a	25.1 a	7 028 a
	20%缓释氮肥	256 ab	134 a	98.3 a	25.1 a	6 830 a
	40%缓释氮肥	274 a	135 a	95.3 ab	25.1 a	6 834 a
	60%缓释氮肥	240 bc	144 a	91.6 b	25.1 a	7 184 a
2017	无氮对照(CK)	185 c	182 a	71.9 a	25.3 a	5 611 b
	常规施肥	253 b	191 a	68.7 a	25.1 ab	7 206 a
	20%缓释氮肥	295 a	169 a	68.1 a	25.0 b	7 295 a
	40%缓释氮肥	230 b	181 a	72.8 a	25.1 ab	7 111 a
	60%缓释氮肥	265 ab	180 a	70.7 a	25.1 ab	7 028 a

年份	处理	有效穗/ m^-2	每穗粒数	结实率/ %	千粒重/ g	产量/ (kg·hm^-2)
2016	无氮对照(CK)	210 c	132 a	96.0 ab	25.2 a	6 034 b
	常规施肥	235 bc	147 a	98.4 a	25.1 a	7 028 a
	20%缓释氮肥	256 ab	134 a	98.3 a	25.1 a	6 830 a
	40%缓释氮肥	274 a	135 a	95.3 ab	25.1 a	6 834 a
	60%缓释氮肥	240 bc	144 a	91.6 b	25.1 a	7 184 a
2017	无氮对照(CK)	185 c	182 a	71.9 a	25.3 a	5 611 b
	常规施肥	253 b	191 a	68.7 a	25.1 ab	7 206 a
	20%缓释氮肥	295 a	169 a	68.1 a	25.0 b	7 295 a
	40%缓释氮肥	230 b	181 a	72.8 a	25.1 ab	7 111 a
	60%缓释氮肥	265 ab	180 a	70.7 a	25.1 ab	7 028 a

年份	处理	氮含量/(g·kg^-1)		氮积累量/(kg·hm^-2)
年份	处理	籽粒	秸秆	籽粒	秸秆	总
2016	无氮对照(CK)	10.8 b	5.5 b	65.0 b	20.0 b	85.0 b
	常规施肥	13.5 a	8.2 a	95.2 a	39.2 a	134.4 a
	20%缓释氮肥	13.8 a	6.0 b	94.8 a	27.3 b	122.1 a
	40%缓释氮肥	13.1 a	6.7 ab	90.1 a	30.3 ab	120.4 a
	60%缓释氮肥	13.7 a	7.9 a	98.4 a	40.1 a	138.5 a
2017	无氮对照(CK)	13.6 b	6.7 b	76.0 b	23.7 b	99.6 b
	常规施肥	15.7 a	9.5 a	113.2 a	47.4 a	160.6 a
	20%缓释氮肥	13.8 b	9.0 a	100.9 a	43.5 a	144.4 a
	40%缓释氮肥	14.7 ab	9.9 a	104.5 a	46.5 a	150.9 a
	60%缓释氮肥	16.5 a	9.3 a	115.9 a	39.6 a	155.5 a

年份	处理	氮含量/(g·kg^-1)		氮积累量/(kg·hm^-2)
年份	处理	籽粒	秸秆	籽粒	秸秆	总
2016	无氮对照(CK)	10.8 b	5.5 b	65.0 b	20.0 b	85.0 b
	常规施肥	13.5 a	8.2 a	95.2 a	39.2 a	134.4 a
	20%缓释氮肥	13.8 a	6.0 b	94.8 a	27.3 b	122.1 a
	40%缓释氮肥	13.1 a	6.7 ab	90.1 a	30.3 ab	120.4 a
	60%缓释氮肥	13.7 a	7.9 a	98.4 a	40.1 a	138.5 a
2017	无氮对照(CK)	13.6 b	6.7 b	76.0 b	23.7 b	99.6 b
	常规施肥	15.7 a	9.5 a	113.2 a	47.4 a	160.6 a
	20%缓释氮肥	13.8 b	9.0 a	100.9 a	43.5 a	144.4 a
	40%缓释氮肥	14.7 ab	9.9 a	104.5 a	46.5 a	150.9 a
	60%缓释氮肥	16.5 a	9.3 a	115.9 a	39.6 a	155.5 a

年份	处理	氮素收获指数/%	氮肥表观利用率/%	氮肥农学效率/ (kg·kg^-1)	氮肥偏生产力/ (kg·kg^-1)
2016	无氮对照(CK)	76.5 ab	0	0	0
	常规施肥	71.0 b	18.3 b	3.7 b	26.0 b
	20%缓释氮肥	77.6 a	17.2 b	3.7 b	31.6 a
	40%缓释氮肥	74.7 ab	16.4 b	3.7 b	31.6 a
	60%缓释氮肥	71.2 b	27.8 a	5.3 a	33.3 a
2017	无氮对照(CK)	76.4 a	0	0	0
	常规施肥	70.5 b	22.6 ab	5.9 b	26.7 b
	20%缓释氮肥	69.9 b	20.7 b	7.8 a	33.4 a
	40%缓释氮肥	69.3 b	23.8 ab	7.0 ab	32.3 a
	60%缓释氮肥	74.5 a	25.9 a	6.6 ab	32.5 a

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