祁連山區(qū)土壤砂粒含量剖面分布模式及其影響因素
發(fā)布時(shí)間:2018-07-06 17:56
本文選題:土壤顆粒組成 + 砂粒含量; 參考:《土壤學(xué)報(bào)》2017年04期
【摘要】:祁連山區(qū)是西北黑河流域的水源,理解祁連山區(qū)土壤顆粒組成的剖面分布模式及其與環(huán)境要素之間的關(guān)系,有助于進(jìn)一步定量理解土壤中水、肥、氣、熱的運(yùn)移和開展顆粒組成/質(zhì)地的三維制圖。以2012—2013年獲取的深度≥1 m的69個(gè)代表性土壤剖面為對(duì)象,分析了含量變異最大的砂粒的剖面分布模式及其與海拔、坡度、坡向、年均降水、平面曲率、剖面曲率、地形濕度指數(shù)、NDVI、土地利用、成土母質(zhì)等環(huán)境變量之間的關(guān)系。結(jié)果表明:祁連山區(qū)砂粒含量的剖面分布模式可分為均一型、遞增型、遞減型、先增后減型、先減后增型和不規(guī)則型六類,但其很難用單一的環(huán)境變量來定量預(yù)測(cè),其根源在于祁連山區(qū)成土母質(zhì)復(fù)雜多樣,加上復(fù)雜的地貌地形、土地利用等導(dǎo)致母質(zhì)易發(fā)生運(yùn)移而產(chǎn)生不連續(xù)性;對(duì)應(yīng)復(fù)雜山區(qū)的土壤顆粒剖面分布模式的定量預(yù)測(cè),還需從復(fù)合環(huán)境變量的角度進(jìn)行深入的探索研究。
[Abstract]:The Qilian Mountain region is the source of water in the Heihe River Basin in Northwest China. Understanding the distribution model of soil particle composition and its relationship with environmental elements in the Qilian Mountains region is helpful for further quantitative understanding of water, fertilizer and gas in soil. Heat migration and development of three-dimensional mapping of particle composition / texture. Based on 69 representative soil profiles with depth 鈮,
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