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西藏草地净初级生产力的时空格局演变及其驱动机制分析
引用本文:巴桑参木决,温仲明,刘洋洋,周荣磊,任涵玉,林子琦,张志新,王亦波,张格语. 西藏草地净初级生产力的时空格局演变及其驱动机制分析[J]. 草地学报, 2022, 30(4): 778-789. DOI: 10.11733/j.issn.1007-0435.2022.04.002
作者姓名:巴桑参木决  温仲明  刘洋洋  周荣磊  任涵玉  林子琦  张志新  王亦波  张格语
作者单位:1. 西北农林科技大学草业与草原学院, 陕西 杨凌 712100;2. 西藏拉萨市当雄县宁中乡农牧综合服务中心, 西藏 拉萨 851500
基金项目:陕西省林业科学院科技创新计划;国家科技基础条件平台建设计划;国家自然科学基金;中国博士后科学基金;西北农林科技大学—西藏农牧学院联合基金;西北农林科技大学博士科研启动金
摘    要:本研究基于遥感和气象数据,采用净初级生产力(Net primary productivity,NPP)作为草地指标,辅以模型模拟和野外观测等方法探究西藏草地N PP的格局演化特征,并探究其潜在驱动因素.结果表明:研究期内西藏草地NPP年均值为136.46 gC·m-2·a-1,并以1.57 gC·m-2·a-1的变化率...

关 键 词:西藏  净初级生产力  草地动态  气候变化  人类活动
收稿时间:2021-09-23

Analysis of the Spatial-Temporal Evolution Patterns of Grassland Net Primary Productivity and Its Driving Mechanisms in the Tibet
BASANG Can-mujue,WEN Zhong-ming,LIU Yang-yang,ZHOU Rong-lei,REN Han-yu,LIN Zi-qi,ZHANG Zhi-xin,WANG Yi-bo,ZHANG Ge-yu. Analysis of the Spatial-Temporal Evolution Patterns of Grassland Net Primary Productivity and Its Driving Mechanisms in the Tibet[J]. Acta Agrestia Sinica, 2022, 30(4): 778-789. DOI: 10.11733/j.issn.1007-0435.2022.04.002
Authors:BASANG Can-mujue  WEN Zhong-ming  LIU Yang-yang  ZHOU Rong-lei  REN Han-yu  LIN Zi-qi  ZHANG Zhi-xin  WANG Yi-bo  ZHANG Ge-yu
Affiliation:1. College of Grassland Agriculture, Northwest Agriculture and Forestry University, Yangling, Shaanxi Province 712100, China;2. Agriculture and Animal Husbandry Service Center of Ningzhong Township Damxung County, Lasa, Tibet 851500, China
Abstract:In this study,based on remote sensing and meteorological data,the evolution pattern and its potential driving factors of Tibetan grassland NPP (Spatiotemporal dynamics,Stability and continuity) were analyzed by using the Net primary productivity (NPP) combined with model simulation and field observations in this study.The results showed that the annual mean NPP of grassland in Tibet was 136.46 gC·m-2·a-1,and it showed a significant increasing trend with the change rate of 1.57 gC·m-2·a-1 during the study period.Grassland NPP showed a decreasing trend from southeast to northwest.In terms of future changes,the grassland NPP in Nyingchi,Nagqu and other places will consistently increase or decrease,while the junction of Xigaze,Ali,and Nagqu show an inconsistent tendency.The NPP distribution of different grassland types was also quite different,the alpine and subalpine meadows have the highest NPP value,while plain grasslands were the lowest.Grassland NPP was positively correlated with temperature,but not significantly correlated with precipitation,indicating that temperature was the limiting climate factor for grassland NPP in the region.The implementation of policies for human activities,such as rotation grazing in areas,fences,and enclosures has played an important role in promoting the increase of grassland NPP in Tibet.
Keywords:Tibet  Net primary productivity  Grassland dynamic  Climate change  Human activity  
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