Effects of Revegetation Types on the Soil Carbon, Nitrogen and Phosphorus of the Gully Areas in Hilly Loess Plateau, China

doi:10.11733/j.issn.1007-0435.2015.01.010

Acta Agrestia Sinica ›› 2015, Vol. 23 ›› Issue (1): 62-68.DOI: 10.11733/j.issn.1007-0435.2015.01.010

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Effects of Revegetation Types on the Soil Carbon, Nitrogen and Phosphorus of the Gully Areas in Hilly Loess Plateau, China

XU Ming^1,2, ZHANG Jian^1,3, LIU Guo-bin^1,4, ZHANG Ting^1,2

1. State Key Laboratory of Soil Erosion and Dry Land Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi Province 712100, China;
2. Graduate University of Chinese Academy of Sciences, Beijing 100049, China;
3. Research Center for Eco-Environmental Sciences, Chinese Academy of Science, Beijing 100086, China;
4. Northwest A&F University, Yangling, Shaanxi Province 712100, China

Received:2014-03-06 Revised:2014-06-23 Online:2015-02-15 Published:2015-01-31

黄土丘陵区不同植被恢复模式对沟谷地土壤碳氮磷元素的影响

徐明^1,2, 张健^1,3, 刘国彬^1,4, 张婷^1,2

1. 中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室, 陕西杨凌 712100;
2. 中国科学院研究生院, 北京 100049;
3. 中国科学院生态环境研究中心, 北京 100086;
4. 西北农林科技大学, 陕西杨凌 712100

通讯作者: 刘国彬
作者简介:徐明(1982-),女,安徽天长人,博士研究生,主要研究流域生态恢复与管理,E-mail:mingxu566@163.com
基金资助:
中国科学院战略性先导科技专项(XDA05060300)资助

Abstract

Abstract:

In this study, three representative vegetation restoration patterns were selected in gully areas including an artificial Robinia pseudoacacia forest gully (G-Rp), an artificial Caragana korshinskii shrubland gully (G-Ck), and a natural grassland gully (G-Ng). Soil samples were collected along five gully position transects on each gully. The study evaluated the effects of three revegetation types on the soil carbon, nitrogen and phosphorus of the gully areas. Results indicated that three revegetation types in the gully areas could significantly improve soil organic carbon and soil total nitrogen contents and storages, and slightly reduce soil P contents and storages. G-Ck significantly reduced soil P contents and storages compared with CK (slope cropland) (P<0.05). The spatial distributions of soil C, N, P contents and storages were significantly different among three gully areas (P<0.05). There was a significantly and positively linear correlation between soil C and N (P<0.0001). Therefore, the implementation of revegetation in gully area, as one of important geomorphic unit, can significantly increase carbon sequestration and N stocks.

Key words: Revegetation, Topography, Gully area, Robinia pseudoacacia, Caragana korshinskii

摘要：

选取黄土丘陵区3种代表性植被恢复模式的沟谷地样地:人工刺槐(Robinia pseudoacacia)林沟谷地(G-Rp),人工柠条(Caragana korshinskii)灌丛沟谷地(G-Ck)和天然草地沟谷地(G-Ng).通过分析沟谷地5个坡位样带的土壤样品,评价了不同植被恢复模式对沟谷地土壤碳氮磷元素的影响.结果表明:3种植被恢复模式对沟谷地土壤有机碳和全氮的含量及储量具有显著的改善作用,对土壤全磷含量及储量略有减少的影响,其中柠条灌丛沟谷地土壤磷相对于对照(坡耕地)减少达显著差异(P<0.05);土壤碳氮磷的含量及储量在沟谷地的空间分布存在显著差异(P<0.05),总体呈由上到下递增趋势(除G-Rp沟底);沟谷地土壤碳氮元素间呈正向和极显著的线性相关关系(P<0.0001).在黄土丘陵区沟谷地地貌单元实施植被恢复,可显著地提高沟谷地土壤的碳汇和氮素储量.

关键词: 植被恢复, 地形, 沟谷地, 刺槐, 柠条

CLC Number:

S158.3

XU Ming, ZHANG Jian, LIU Guo-bin, ZHANG Ting. Effects of Revegetation Types on the Soil Carbon, Nitrogen and Phosphorus of the Gully Areas in Hilly Loess Plateau, China[J]. Acta Agrestia Sinica, 2015, 23(1): 62-68.

徐明, 张健, 刘国彬, 张婷. 黄土丘陵区不同植被恢复模式对沟谷地土壤碳氮磷元素的影响[J]. 草地学报, 2015, 23(1): 62-68.

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Effects of Revegetation Types on the Soil Carbon, Nitrogen and Phosphorus of the Gully Areas in Hilly Loess Plateau, China

黄土丘陵区不同植被恢复模式对沟谷地土壤碳氮磷元素的影响

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