人类活动对锡林郭勒盟草原净初级生产力的影响研究

发布时间：2018-02-01 07:27

本文关键词： 净初级生产力人类活动锡林郭勒盟草原　出处：《自然资源学报》2017年07期 　论文类型：期刊论文

【摘要】：净初级生产力是草地生态系统生产能力的体现,同时也是草地生态系统固碳能力的重要指标。论文利用MOD17A3净初级生产力数据(NPP)与气象资料,分析了2001—2010年人类活动对锡林郭勒盟草原净初级生产力的影响。研究表明:1)锡林郭勒盟草原实际净初级生产力(NPP_A)介于41.32~362.27 g C·m~(-2)·a~(-1),均值为150.78 g C·m~(-2)·a~(-1),有较明显的水平地带性规律,由东向西逐渐减小,草甸草原最大,典型草原次之,荒漠草原最小;2)锡林郭勒盟草原人类活动影响的净初级生产力(NPPH)介于-185.07~153.92 g C·m~(-2)·a~(-1),均值为-34.80 g C·m~(-2)·a~(-1),人类活动负作用占草原总面积的93.4%,人类活动正作用仅占6.6%;3)人类活动对锡林郭勒盟草原净初级生产力的影响主要是由负作用向正作用转变,且空间分布有明显的南北界线,南部表现为负作用增强,北部为正作用增强。研究可为锡林郭勒盟草地资源的管理和可持续利用提供参考依据。
[Abstract]:Net primary productivity is the embodiment of grassland ecosystem productivity. It is also an important indicator of carbon sequestration ability of grassland ecosystem. The net primary productivity data of MOD17A3 and meteorological data are used in this paper. The effect of human activities on net primary productivity of grassland in Xilingor League from 2001 to 2010 was analyzed. The results show that: 1) actual net primary productivity of grassland in Xilingor League is NPP _ S _ A). Between 41.32 ~ 362.27 g C 路m ~ (-2) 路a ~ (-1)). The mean value is 150.78 g C 路m ~ (2) 路a ~ (-1) ~ (-1), which has obvious horizontal zonality, and gradually decreases from east to west, the meadow grassland is the largest, and the typical grassland is the second. The desert steppe is the smallest; 2) the net primary productivity (NPPH) of human activities in the grassland of Xilinguole League is between -185.07 and 153.92 g C 路m-1). The mean value was -34.80 g C 路mG-2) 路Acai ~ (-1), the negative action of human activities occupied 93.4% of the total grassland area, and the positive action of human activities only accounted for 6.6% of the total grassland area. 3) the influence of human activities on the net primary productivity of Xilinguole grassland is mainly from the negative action to the positive one, and the spatial distribution has an obvious north-south boundary, and the south shows a negative effect. The study can provide a reference for the management and sustainable utilization of grassland resources in Xilinguole League.
【作者单位】：太原理工大学矿业工程学院;
【基金】：国家自然科学基金项目(41301053) 山西省高等学校创新人才支持计划山西省青年科技研究基金项目(2013021030-1)~~
【分类号】：S812
【正文快照】： 净初级生产力(Net Primary Productivity,NPP)是衡量植物群落在自然环境条件下生产能力的指标,是指单位时间、单位面积上植被所积累有机物质的总量,是光合作用所生成有机物质和呼吸作用消耗有机物质之间的差值[1-2]。草地是陆地生态系统的重要组成部分,约占地球表面面积的1/5,

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