岷江上游干旱河谷区灌丛植被土壤有机碳稳定性特征

来源 :水土保持学报 | 被引量 : 20次 | 上传用户:zimomo
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
灌丛在岷江上游分布广泛,是干旱河谷区重要的物种,砍伐、开垦和过度放牧是导致其退化的根本驱动力。通过选取灌丛植被下土壤剖面,并以其被开垦后的农地(50a)及退耕荒坡(10a)为参照,对其土壤有机碳、重组有机碳及易氧化碳含量进行分析比较。结果表明:灌丛植被各层土壤总有机碳及重组有机碳均极显著大于对照的,对照间差异不显著,在0-100cm土壤剖面,对照1退耕荒坡及对照2农地土壤有机碳较灌丛植被的最高降幅分别达60.42%,70.92%,重组有机碳最高降幅则分别达76.54%,68.92%,并且灌丛及对照2
其他文献
Praseodymium β-diketone chelate, Pr(DPM)3 [DPM=2,2,6,6-tetramethyl-3,5-heptanedionato], was successfully synthesized from the inorganic salt praseodymium chlor
Eleven new 1-{5-[4-(benzyloxy)phenyl]-3-methyl-4,5-dihydropyrazol-1-yl} oxime ester derivatives were synthesized and characterized by elemental analysis,HRMS,1H
Low-temperature heat capacities of the solid compound Zn(C4H7O5)2(s) were measured in a temperature range from 78 to 374 K, with an automated adiabatic calorime
The near-infrared(NIR) diffuse reflectance spectroscopy was used to study the content of Berberine in the processed Coptis. The allocated proportions of Coptis
0.5%Pt-K/γ-Al2O3 catalysts for the synthesis of o-phenylphenol(OPP) from o-cyclohexenyl-cyclohexanone (dimer) dehydrogenation were prepared by means of a two s
深部隐伏酸性岩体形成(或侵入)产生的含矿气水热液沿断裂向上运移,在特定地质条件下反复充填交代成矿。地下水渗透或环流则从围岩或先期形成的矿床中溶解出矿质,在有利条件下沉积
测区引起磁异常的有磁铁矿(化)体和玄武岩,二者之间的磁性差异很大,为磁法勘探寻找磁铁矿奠定物性基础。通过磁法勘探的野外作业和室内数据整理分析,并经异常推断解释圈出矿体5个,