节水减氮对土壤硝态氮分布和冬小麦水氮利用效率的影响

节水减氮对土壤硝态氮分布和冬小麦水氮利用效率的影响

雒文鹤,师祖姣,王旭敏,李军,王瑞

Effects of water saving and nitrogen reduction on soil nitrate nitrogen distribution, water and nitrogen use efficiencies of winter wheat

Wen-He LUO,Zu-Jiao SHI,Xu-Min WANG,Jun LI,Rui WANG

表2 施氮和灌水处理对冬小麦产量及其构成因素的影响

Table 2 Effects of nitrogen application and irrigation on winter wheat yield and its components

处理 Treatment	2017?2018					2018?2019
处理 Treatment	穗数 SN (×10³spikes hm^-2)	穗粒数 GNS	千粒重 TGW (g)	产量 GY (kg hm^-2)		穗数 SN (×10³spikes hm^-2)	穗粒数 GNS	千粒重 TGW (g)	产量 GY (kg hm^-2)
N0	558.07 c	37 a	37.51 a	6819 c		327.80 c	33 a	45.62 a	4860 d
N75	565.77 bc	39 a	37.64 a	7580 b		460.17 ab	29 b	42.11 bc	5959 c
N150	599.13 ab	37 a	37.73 a	8092 a		482.90 a	29 b	42.24 bc	6599 b
N225	596.57 ab	38 a	38.46 a	7578 b		467.50 ab	30 b	41.65 c	7172 a
N300	607.20 a	37 a	36.89 a	7467 b		434.87 b	30 b	43.44 b	6910 ab
W0	529.76 c	38 a	39.84 a	6827 b		392.70 b	21 b	37.72 c	1676 b
W1	589.38 b	38 a	37.29 b	7843 a		415.36 b	36 a	48.83 a	8656 a
W2	636.90 a	37 a	35.81 c	7852 a		495.88 a	34 a	42.94 b	8569 a
F-value
N	3.91^*	1.21^NS	1.13^NS	15.17^***		17.66^***	3.79^**	137.26^***	29.43^***
W	39.11^***	1.52^NS	24.69^***	42.43^***		22.37^***	150.77^***	110.84^***	922.80^***
N×W	1.71^NS	8.04^***	4.40^**	5.94^***		7.56^***	9.96^***	2.196^NS	2.14^NS