降雨变化对高寒草甸不同植物功能群凋落物质量及其分解的影响

杨德春, 胡雷, 宋小艳, 王长庭

Effects of changing precipitation on litter quality and decomposition of different plant functional groups in an alpine meadow

YANG De-Chun, HU Lei, SONG Xiao-Yan, WANG Chang-Ting

表4 不同降雨处理下不同类型凋落物质量残留率随时间的指数回归方程

Table 4 Exponential regression equations between mass remaining rate of different litter types and time under different precipitation treatments

凋落物类型 Litter type	降雨处理 Precipitation treatment	回归方程 Regression equation	R²	分解系数 Decomposition coefficient (k)	半分解时间 t_0.5 (a)	分解95%时间 t_0.95 (a)
禾本科 Grass	Pr-90	y = e^-0.268^t	0.955	0.268	2.59	11.18
	Pr-50	y = e^-0.438^t	0.935	0.438	1.58	6.84
	Pr-30	y = e^-0.373^t	0.987	0.373	1.86	8.03
	CK	y = e^-0.513^t	0.898	0.513	1.35	5.84
	Pr+50	y = e^-0.391^t	0.947	0.391	1.77	7.66
莎草科 Sedge	Pr-90	y = e^-0.387^t	0.989	0.387	1.79	7.74
	Pr-50	y = e^-0.591^t	0.945	0.591	1.17	5.07
	Pr-30	y = e^-0.581^t	0.981	0.581	1.19	5.16
	CK	y = e^-0.568^t	0.939	0.568	1.22	5.27
	Pr+50	y = e^-0.644^t	0.908	0.644	1.08	4.65
杂类草 Forb	Pr-90	y = e^-0.402^t	0.958	0.402	1.72	7.45
	Pr-50	y = e^-0.628^t	0.962	0.628	1.10	4.77
	Pr-30	y = e^-0.668^t	0.894	0.668	1.04	4.49
	CK	y = e^-0.699^t	0.933	0.699	0.99	4.29
	Pr+50	y = e^-0.858^t	0.978	0.858	0.81	3.49
群落 Community	Pr-90	y = e^-0.372^t	0.888	0.372	1.86	8.05
	Pr-50	y = e^-0.626^t	0.948	0.626	1.11	4.79
	Pr-30	y = e^-0.695^t	0.942	0.695	1.00	4.31
	CK	y = e^-0.710^t	0.959	0.710	0.98	4.22
	Pr+50	y = e^-0.737^t	0.945	0.737	0.94	4.07