【摘要】：基于一元線性回歸法和Mann-Kendall檢驗方法,使用2000-2014年遙感數(shù)據(jù),分析15年中亞五國及新疆GPP、ET、WUE的空間格局變化及趨勢特征,并將參數(shù)檢驗結(jié)果相結(jié)合進行分類,分析WUE格局變化原因。研究表明:(1)GPP、ET、WUE在時間序列上無顯著變化,WUE空間變化顯著增加的區(qū)域為哈薩克斯坦北部、伊犁河谷和吉爾吉爾斯坦高山區(qū),下降區(qū)域為新疆南疆和烏茲別克斯坦灌溉區(qū)。(2)WUE變化的主要土地覆蓋類型是農(nóng)田和草地,中密度人口區(qū)WUE變化較大。(3)WUE上升因降水增加、退耕導致的GPP增加,干旱脅迫下植被抗逆導致ET下降,WUE下降由于農(nóng)作物類型轉(zhuǎn)變及灌溉區(qū)不合理用水造成。開展中亞WUE空間格局變化研究,可為"一帶一路"的順利推進提供理論依據(jù)。
[Abstract]:Based on univariate linear regression method and Mann-Kendall test method, the spatial pattern changes and trend characteristics of GPP,ET,WUE in five countries of Central Asia and Xinjiang for 15 years were analyzed by using remote sensing data from 2000 to 2014, and the results of parameter test were combined to classify. The reason for the change of WUE pattern was analyzed. The results show that: (1) GPP,ET,WUE has no significant change in time series. The regions with significant increase in WUE spatial change are the northern Kazakhstan, the Ili River Valley and the Gilstein Alpine region. (2) the main land cover types of WUE change were farmland and grassland, and WUE in middle density population area changed greatly. (3) the increase of WUE was caused by the increase of precipitation and the increase of GPP caused by returning farmland. Under drought stress, vegetation stress induced the decrease of ET, and the decrease of WUE was caused by crop type change and unreasonable water use in irrigation area. The research on the spatial pattern change of WUE in Central Asia can provide theoretical basis for the smooth advancement of Belt and Road.
【作者單位】： 新疆大學資源與環(huán)境科學學院 綠洲生態(tài)教育部重點實驗室;北京師范大學水科學研究院 環(huán)境遙感與數(shù)字城市北京市重點實驗室;
【基金】：自治區(qū)科技支疆項目(201591101) 自治區(qū)重點實驗室專項基金項目(2016D03001,2014KL005) 國家自然科學基金項目(U1303381,41261090,41161063) 教育部促進與美大地區(qū)科研合作與高層次人才培養(yǎng)項目
【分類號】：Q14

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