典型黑土春玉米化学肥料养分利用效率变化研究

仇少君,李宁,何萍,魏丹,金梁,赵士诚,徐新朋,周卫

Nutrients Use Efficiency Change of Chemical Fertilizers for Spring Maize in a Typical Black Soil

Ning LI,Ping HE,Wei ZHOU,Dan WEI,Liang JIN,ShiCheng ZHAO,XinPeng XU,ShaoJun QIU

表5 2013—1016年不同处理氮磷钾平衡

Table 5 Nitrogen, phosphorus and potassium balances in different treatments from 2013 to 2016

处理 Treatment	氮平衡N balance (kg N·hm^-2)					磷平衡P balance (kg P·hm^-2)					钾平衡K balance (kg K·hm^-2)
处理 Treatment	2013	2014	2015	2016	平均 Average	2013	2014	2015	2016	平均 Average	2013	2014	2015	2016	平均 Average
CK	150.0a	62.7a	65.4a	59.9a	84.5a	35.6a	20.8b	28.7a	14.1b	24.8b	144.9a	71.7b	78.6b	55.5b	87.7b
PK	150.7a	66.1a	79.0a	64.7a	91.8a	1.5b	-8.9d	0.1c	-17.2d	-6.1d	54.6b	-5.1d	10.3d	-16.7c	10.8e
NK	-32.6b	-41.0c	-11.8c	-16.3b	-25.4c	33.6a	31.8a	33.2a	19.4a	29.5a	56.9b	24.5c	27.4d	-1.2c	26.9d
NP	-19.2b	-26.4bc	9.2b	-16.7b	-13.3b	-0.3b	0.5c	3.9bc	-13.6d	-2.4cd	152.3a	120.1a	136.2a	122.4a	122.1a
NPK	-25.0b	-16.8b	17.9b	2.4b	-6.8b	-0.6b	1.9c	8.2b	-7.3c	0.5c	62.1b	37.3c	53.8c	43.9b	41.7c