期刊论文

Plant and soil nutrient characteristics in the karst shrub ecosystem of southwest Hunan,China

Deng, X.-W.

中文

应用生态学报

1001-9332

2016

27

4

1015-1023

10.13287/j.1001-9332.201604.015

国家林业局林业科学技术推广项目（[2014]52号）;国家林业局荒漠化（石漠化）定位监测项目（20130910,20150618）； 国家林业公益性行业科研专项（201404316）资助~~；

本校为第一机构

以湖南省邵阳县轻度、中度(弃耕地)和重度石漠化的灌丛生态系统为研究对象,采集3种不同石漠化程度的灌丛植物样品以及0 ~ 15、15 ~ 30、30 ~ 45 cm 3个土层土壤,研究土壤、植被养分的分配格局及相互关系. 结果表明: 土壤有机碳、全N含量在不同土层中差异显著,且其含量均随土层深度增加而减少,而全P、全K、全Ca、全Mg含量在各土层间无显著差异; 3种石漠化程度灌丛土壤全N、全P、全Ca、全Mg含量差异显著,且中度石漠化样地土壤有机碳、全N和全P含量相对较高. 轻度和重度石漠化土壤各元素含量排序均为有机碳>全K>全Ca>全Mg>全N>全P,而中度石漠化样地土壤各元素含量排序为有机碳>全K>全Ca>全N>全Mg>全...

This research was conducted in light (LRD), moderate (MRD, abandoned land) and intense (IRD) rocky desertification shrub ecosystems in Shaoyang, Hunan Province. We collected plant samples and soil at 3 layers (0-15, 15-30, 30-45 cm), and analyzed the distribution patterns of soil and plant nutrients and the relationships among them. Our results showed that the contents of soil organic carbon (SOC) and total N in different soil layers were various and decreased with soil depth, while the contents of total P, K, Ca and Mg had no obvious variation...