Effects of Climate Change on Aboveground Biomass in Hulunbeir Grassland

doi:10.11924/j.issn.1000-6850.casb20191200984

Abstract

Abstract:

Based on the main meteorological data such as temperature, pressure, humidity, wind and the measured data of aboveground biomass in the growing season, the effects of climate change and types of climatic year on the formation of forage yield were analyzed. The results showed that: (1) the precipitation of Erguna and Ewenck meteorological station fluctuated without obvious trend; (2) the mean annual temperature of the two meteorological stations increased significantly, with the trend of 0.348℃/10 a and 0.444℃/10 a, respectively, the rate of temperature increase was obviously higher than that in northeast China during the same period, and the rate of temperature increase in Ewenck was higher than that in Qinghai-Tibet area where the temperature increase was the fastest; (3) the potential evapotranspiration of Erguna and Ewenck fluctuated and increased; (4) the wet index degree of the two meteorological stations showed a significant fluctuation and decreasing trend, and the climate showed a more obvious drying trend; (5) the moisture condition affected the formation of grassland biomass in the two meteorological stations, and the formation of aboveground biomass was significantly inhibited in drought year. There was a linear regression relationship between the aboveground biomass and the moisture index of the month and the previous month.

Key words: Hulunbeir, climate change, climate year type, aboveground biomass, changing trend, correlation relationship

CLC Number:

Wang Haimei, , Liu Hao, Xiao Fang. Effects of Climate Change on Aboveground Biomass in Hulunbeir Grassland[J]. Chinese Agricultural Science Bulletin, 2020, 36(35): 99-105.

Figures/Tables 7

References 26

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	P₀	P_-1	P_-2	T₀	T_-1	T_-2	R₀	R_-1	R_-2	W₀	W_-1	W_-2
额尔古纳	0.367^**	0.529^**	0.362^**	0.319^**	0.485^**	0.445^**	-0.156	-0.143	0.078	-0.502^**	-0.601^**	-0.131
鄂温克	0.511^**	0.547^**	0.376^**	0.446^**	0.660^**	0.604^**	-0.197*	0.127	0.221^**	-0.642^**	-0.569^**	-0.026

	P₀	P_-1	P_-2	T₀	T_-1	T_-2	R₀	R_-1	R_-2	W₀	W_-1	W_-2
额尔古纳	0.367^**	0.529^**	0.362^**	0.319^**	0.485^**	0.445^**	-0.156	-0.143	0.078	-0.502^**	-0.601^**	-0.131
鄂温克	0.511^**	0.547^**	0.376^**	0.446^**	0.660^**	0.604^**	-0.197*	0.127	0.221^**	-0.642^**	-0.569^**	-0.026

变量及控制变量	额尔古纳			变量及控制变量	鄂温克
变量及控制变量	P₀	P_-1	W_-1	变量及控制变量	P₀	P_-1	T_-1	W₀
P_-1、W_-1	0.218^**			P_-1、T_-1、W₀	0.320^**
P₀、W_-1		0.229^**		P₀、T_-1、W₀		0.255^**
P₀、P_-1			-.426^**	P₀、P_-1、W₀			0.302^**
				P₀、P_-1、T_-1				0.250^**

变量及控制变量	额尔古纳			变量及控制变量	鄂温克
变量及控制变量	P₀	P_-1	W_-1	变量及控制变量	P₀	P_-1	T_-1	W₀
P_-1、W_-1	0.218^**			P_-1、T_-1、W₀	0.320^**
P₀、W_-1		0.229^**		P₀、T_-1、W₀		0.255^**
P₀、P_-1			-.426^**	P₀、P_-1、W₀			0.302^**
				P₀、P_-1、T_-1				0.250^**

取值区间		偏旱年	正常年	湿润年
取值区间		△K≤-15%	-15%<△K<15%	15%≤△K
发生年份	鄂温克	1986,1987,2001,2003,2006,2007, 2015,2016,2017	1983,1985,1992,1994,1995,1996,1997,2000,2002, 2004,2005,2008,2009,2010,2012,2014,2018	1984,1988,1989,1990,1991, 1993,1998,2013
发生年份	额尔古纳	1986,1994,1995,2000,2001,2002,2004,2006, 2007,2008,2010,2012,2015,2016,2017,2018	1982,1983,1985,1987,1993,1997,1999,2003,2005, 2009	1988,1989,1990,1991,1992, 1996,1998,2013,2014