华北寒旱区作物轮作的生产效应

姚兆磊, 张继宗, 杜玉琼, 刘玉华, 张立峰

Productivity evaluation of crop rotation in cold and arid region of Northern China

Zhao-Lei YAO, Ji-Zong ZHANG, Yu-Qiong DU, Yu-Hua LIU, Li-Feng ZHANG

表5 作物种植模式的轮作土地当量比

Table 5 Crop rotation land equivalent ratio of cropping patterns

种植模式 Cropping pattern	年份 Year	轮作土地当量比LERr	效应Effect	种植模式 Cropping pattern	年份 Year	轮作土地当量比LERr	效应Effect
连作马铃薯	2016	1.00	0	甜菜→马铃薯	2016	1.72	++
Continuous cropping potato	2017	1.00	0	Beet→Potato	2017	1.42	++
	2018	1.00	0		2018	1.59	++
	2019	1.00	0		2019	1.06	+-
	Average	1.00 a	0		Average	1.45 cd	+
连作蚕豆 Continuous cropping faba bean	2016	1.00	0	饲用玉米→蚕豆	2016	1.50	++
	2017	1.00	0	Forage maize→Faba bean	2017	1.06	+-
	2018	1.00	0		2018	1.13	++
	2019	1.00	0		2019	1.09	+-
	Average	1.00 a	0		Average	1.20 abc	+
连作饲用玉米 Continuous cropping forage maize	2016	1.00	0	莜麦→蚕豆	2016	1.19	++
	2017	1.00	0	Oat→Faba bean	2017	1.20	++
	2018	1.00	0		2018	1.43	++
	2019	1.00	0		2019	0.99	+-
	Average	1.00 a	0		Average	1.20 abc	+
连作莜麦	2016	1.00	0	甜菜→蚕豆	2016	1.14	+-
Continuous cropping oat	2017	1.00	0	Beet→Faba bean	2017	1.12	+-
	2018	1.00	0		2018	1.11	+-
	2019	1.00	0		2019	1.13	++
	Average	1.00 a	0		Average	1.13 ab	+
连作甜菜	2016	1.00	0	莜麦→饲用玉米	2016	1.00	0
Continuous cropping beet	2017	1.00	0	Oat→Forage maize	2017	1.28	+-
	2018	1.00	0		2018	1.34	++
	2019	1.00	0		2019	0.95	+-
	Average	1.00 a	0		Average	1.14 ab	+
蚕豆→马铃薯	2016	1.46	+-	甜菜→饲用玉米	2016	0.88	+-
Faba bean→Potato	2017	1.39	++	Beet→Forage maize	2017	1.18	+-
	2018	1.23	+-		2018	1.29	++
	2019	1.31	++		2019	1.03	+-
	Average	1.35 bc	+		Average	1.10 ab	+
饲用玉米→马铃薯	2016	1.54	++	甜菜→莜麦	2016	1.20	++
Forage maize→Potato	2017	1.32	++	Beet→Oat	2017	1.19	++
	2018	1.51	++		2018	1.29	++
	2019	1.15	++		2019	1.37	++
	Average	1.38 bc	+		Average	1.26 abc	+
莜麦→马铃薯	2016	2.16	++
Oat→Potato	2017	1.6	++
	2018	1.85	++
	2019	1.12	++
	Average	1.68 d	+