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Frontiers of Environmental Science & Engineering >> 2016, Volume 10, Issue 4 doi: 10.1007/s11783-016-0864-8

Spatial impacts of climate factors on regional agricultural and forestry biomass resources in north-eastern province of China

. School of Environment, State Key Laboratory of Water Environment Simulation, Beijing Normal University, Beijing 100875, China. .. Beijing Zhongchi Green Energy and Environmental Technology Co., Ltd., Golden Resources Office Building, Beijing 100097, China. .. The Administrative Center for China’s Agenda 21, Ministry of Science and Technology of the People’s Republic of China, Beijing 100038, China. .. Department of Soil and Water Conservation, Changjiang River Scientific Research Institute, Wuhan 430019, China

Available online: 2016-08-04

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Abstract

Dynamic analysis of biomass combined NPP modeling has been adopted. Temperature trends to warming and precipitation has periodic fluctuation. Regional distribution of agricultural and forestry biomass is mutual and divergent. Precipitation is significantly positive correlated with agricultural biomass. Temperature is negative on forestry biomass in Lesser Khingan & northern Changbai. Precipitation plays positive effect on biomass in southwestern Changbai Mountain. The dynamics of agricultural and forestry biomass are highly sensitive to climate change, particularly in high latitude regions. Heilongjiang Province was selected as research area in North-east China. We explored the trend of regional climate warming and distribution feature of biomass resources, and then analyzed on the spatial relationship between climate factors and biomass resources. Net primary productivity (NPP) is one of the key indicators of vegetation productivity, and was simulated as base data to calculate the distribution of agricultural and forestry biomass. The results show that temperatures rose by up to 0.37°C/10a from 1961 to 2013. Spatially, the variation of agricultural biomass per unit area changed from -1.93 to 5.85 t·km ·a during 2000–2013. More than 85% of farmland areas showed a positive relationship between agricultural biomass and precipitation. The results suggest that precipitation exerts an overwhelming climate influence on agricultural biomass. The mean density of forestry biomass varied from 10 to 30 t·km . Temperature had a significant negative effect on forestry biomass in Lesser Khingan and northern Changbai Mountain, because increased temperature leads to decreased Rubisco activity and increased respiration in these areas. Precipitation had a significant positive relationship with forestry biomass in south-western Changbai Mountain, because this area had a warmer climate and stress from insufficient precipitation may induce xylem cavitation. Understanding the effects of climate factors on regional biomass resources is of great significance in improving environmental management and promoting sustainable development of further biomass resource use.

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