凋落物输入变化和氮添加对半干旱草原群落生产力及功能群组成的影响

嘎玛达尔基, 杨泽, 谭星儒, 王珊珊, 李伟晶, 游翠海, 王彦兵, 张兵伟, 任婷婷, 陈世苹

Effect of altered litter input and nitrogen addition on ecosystem aboveground primary productivity and plant functional group composition in a semiarid grassland

GAMADAERJI , YANG Ze, TAN Xing-Ru, WANG Shan-Shan, LI Wei-Jing, YOU Cui-Hai, WANG Yan-Bing, ZHANG Bing-Wei, REN Ting-Ting, CHEN Shi-Ping

表3 凋落物输入变化(C)和氮添加(N)对群落地上净初级生产力(ANPP)及各功能群绝对和相对生物量影响的重复测量方差分析(RANOVA)结果

Table 3 Effects of altered litter input (C) and nitrogen addition (N) on community above-ground net primary productivity (ANPP) and absolute and relative biomass of each functional group evaluated using repeated measures analysis of variance (RANOVA)

	df	地上净初级生产力 ANPP	绝对生物量 Absolute biomass					相对生物量 Relative biomass
	df	地上净初级生产力 ANPP	PB	PR	PF	SS	AB	PB%	PR%	PF%	SS%	AB%
区组Block	4	1.72	1.60	0.66	1.17	1.39	1.16	0.87	0.31	1.11	1.94	0.42
C	2	3.20^#	0.77	3.30^#	0.01	0.66	3.13^#	0.18	1.65	0.36	0.70	3.70^*
N	1	62.87^***	31.22^***	7.60^*	1.45	0.17	42.97^***	9.04^**	0.24	12.50^**	2.81	37.54^***
年Year (Y)	5	57.28^***	15.66^***	22.04^***	17.54^***	1.51	4.32^**	4.87^***	8.73^***	6.41^***	1.50	4.32^**
C × N	2	0.02	0.02	0.02	0.08	1.33	2.65^#	0.08	0.18	0.23	1.21	2.96^#
C × Y	10	0.59	1.31	6.36^***	0.76	0.68	1.85^#	2.78^**	5.03^***	0.86	0.44	1.78^#
N × Y	5	7.64^***	8.05^***	2.63^*	5.27^***	2.46^*	3.91^**	8.59^***	0.30	10.38^***	2.72^*	3.67^**
C × N × Y	10	0.84	0.95	1.63	1.22	0.65	1.81^#	0.39	2.26^*	1.46	0.84	1.70^#