本文選題：三江源 + 地上凈初級生產(chǎn)力(ANPP)�。� 參考：《中國草地學報》2017年03期

【摘要】：在野外調(diào)查數(shù)據(jù)檢驗的基礎上,采用CASA模型計算了2000~2014年三江源草地的地上凈初級生產(chǎn)力(ANPP),進而分析了ANPP與氣候因子和載畜量之間的關系。結(jié)果表明:2000~2014年三江源地區(qū)草地ANPP平均值為27.53gC/m2,其中75.81%的區(qū)域呈增加趨勢,24.19%的區(qū)域呈減少趨勢;整個三江源地區(qū)草地ANPP變化與年均溫具有顯著(P0.01)的正相關關系,且在不同降水區(qū)域內(nèi)ANPP隨年均溫的升高表現(xiàn)為先增加后減少;不同區(qū)域草地ANPP對年降水量的響應受溫度的制約,在年均溫-2℃的區(qū)域ANPP隨年降水量的增加而增加,年均溫在-2~-6℃之間的區(qū)域表現(xiàn)為先增加后下降,而在年均溫-6℃的區(qū)域則無響應;三江源草地ANPP對載畜量的影響存在時間滯后性,與當年載畜量的相關性不明顯,而與次年載畜量存在極顯著的相關關系。
[Abstract]:Based on the field survey data, the CASA model was used to calculate the aboveground net primary productivity (NPP) of the grassland in Sanjiangyuan from 2000 to 2014, and the relationship between ANPP and climatic factors and carrying capacity was analyzed. The results showed that the average value of grassland ANPP was 27.53gC / m2 from 2000 to 2014, among which 75.81% showed an increasing trend and 24.19% showed a decreasing trend, and there was a significant positive correlation between grassland ANPP and annual mean temperature (P 0.01). The response of ANPP to annual precipitation in different regions was restricted by temperature, and the ANPP increased with the increase of annual mean temperature at 2 鈩，

本文編號：1978630