施氮量对宁夏引黄灌区麦后复种糜子生长、产量及氮素利用的影响

谢呈辉, 马海曌, 许宏伟, 徐郗阳, 阮国兵, 郭峥岩, 宁永培, 冯永忠, 杨改河, 任广鑫

Effects of nitrogen rate on growth, grain yield, and nitrogen utilization of multiple cropping proso millet after spring-wheat in Irrigation Area of Ningxia

XIE Cheng-Hui, MA Hai-Zhao, XU Hong-Wei, XU Xi-Yang, RUAN Guo-Bing, GUO Zheng-Yan, NING Yong-Pei, FENG Yong-Zhong, YANG Gai-He, REN Guang-Xin

表2 不同施氮量对糜子氮素利用的影响(2019-2020)

Table 2 Effects of different N treatments on nitrogen use efficiency of proso millet in 2019 and 2020

年份 Year	施氮量 N treatment	氮素收获指数 NHI (%)	氮肥表观回收率 NRE (%)	氮肥农学利用率 NAE (kg kg^-1)	氮肥偏生产力 NPFP (kg kg^-1)
2019	N0	60.27±1.09 a	—	—	—
	N1	62.46±1.34 a	38.11±12.50 a	7.87±0.91 a	25.48±0.91 a
	N2	60.45±1.93 a	60.00±1.96 a	9.36±1.75 a	22.57±1.75 a
	N3	64.51±0.81 a	50.15±5.23 a	9.52±2.15 a	20.08±2.15 a
2020	N0	62.07±1.46 ab	—	—	—
	N1	64.49±1.52 a	42.01±8.27 b	11.60±1.12 a	31.49±1.12 a
	N2	60.02±0.20 abc	63.62±3.87 a	12.17±0.61 a	27.09±0.61 b
	N3	59.42±0.95 bc	49.63±4.85 ab	9.11±0.86 b	21.04±0.86 c
	N4	56.66±2.65 c	41.42±5.40 b	7.19±0.69 bc	17.13±0.69 d
	N5	50.89±0.75 d	43.62±6.17 b	6.21±0.41 c	14.74±0.41 d
方差分析 ANOVA
施氮 N treatment (N)		10.59^**	3.20^*	4.23^*	34.74^**
年份 Year (Y)		0.17^ns	0.18^ns	4.33^ns	15.24^**
施氮×年份 N×Y		2.68^ns	0.07^ns	1.63^ns	2.33^ns