黄土高原城郊区植被生产有机物价值的时空差异  

Study on the Difference of the Value of Organic Matter Produced by Vegetation in Suburbs in the Loss Plateau,North Shaanxi Province

作　　者：谢红霞[1] 任志远[1] 莫宏伟[1] 陈秀端[1] 

机构地区：[1]陕西师范大学旅游与环境学院,陕西西安710062

出　　处：《干旱区研究》2007年第3期382-385,共4页Arid Zone Research

基　　金：国家自然科学基金(40371003);教育部重点项目(01158)资助

摘　　要：选取受人类活动影响深刻的生态脆弱区陕北黄土高原城郊区为研究区,利用研究区太阳辐射、降水量、日照率、地面长波辐射、土地利用等数据和区域生态服务价值测算模型测算了研究区植被净生产力、生产有机物价值的时空差异。结果表明:陕北黄土高原城郊区各类植被净生产力年际间变化大;陕北黄土高原城郊区植被净生产力空间差异显著,而且同一区域不同植被类型净生产力也不相同;陕北黄土高原城郊区植被生产有机物总价值随时间变化明显,其中榆林市城郊区年际间变化最大。Based on the data of solar radiation, precipitation, sunshine rate, ground long-wave radiation and land use change and using the estimation model of ecological service value, this paper estimates the spatiotemporal differences of the net productivity of vegetation and of the value of organic matter produce by vegetation in suburbs in the Loess Plateau, north Shaanxi Province, where the entironment is fragile and is strongly affected by human activities. The results are as follows. （1） The interannual variability of the different vegetation types in suburbs in the Loess Plateau, north Shaanxi Province, is very significant due to climate fluctuation; （2） The spatial difference of the net productivity of vegetation in the study area is also significant, and the net productivity of different vegetation types in the same region is different; （3） The temporal difference of the gross value of organic matter produced by vegetation in the study area is obvious, especially in suburbs in the Yulin region; （4） The gross value of organic matter produced by vegetation in suburbs in the Loess Plateau, north Shaanxi Province, is high. However, it is strongly affected by both natural and artificial factors, such as climate change and human activities. Therefore, it is difficult to quantitatively estimate the ecological security by using the gross value of organic matter produced by vegetation in the study area.

关 键 词：黄土高原 城郊区 净生产力 有机物价值量 时空差异 陕北 

分 类 号：Q948[生物学—植物学]