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| Changes in Soil Hot-Water Extractable C, N and P Fractions During Vegetative Restoration in Zhifanggou Watershed on the Loess Plateau |
| XUE Sha, LI Peng, LIU Guo-bin, LI Zhan-bin, ZHANG Chao |
1.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau of Northwest A&F University, Yangling 712100, P.R.China
2.Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry Water Resources, Yangling 712100, P.R.China
3.Key Laboratory of Northwest Water Resources and Environment Ecology, Ministry of Education/Xi’an University of Technology, Xi’an 710048, P.R.China |
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摘要 The study was conducted in Zhifanggou Watershed, Shaanxi Province, China, to evaluate the effect of different vegetation types on hot-water extractable C, N and P fractions, with the aim to determine whether hot-water extractable fractions could be used as indicators of soil quality change in Loess Plateau. The six vegetation types established in 1975 were (i) Robinia pseudoacacia L., (ii) Caragana korshinkii Kom., (iii) Pinus tabulaeformis Carr., (iv) P. tabulaeformis-Amorpha fruticosa L., (v) R. pseudoacacia-A. fruticosa, and (vi) grassland. A cropped hillslope plot and a Platycladus orientalis L. native forest plot were used as references. The results indicated that the conversion of native forest to cropland resulted in a significant decline in the hot-water extractable C, N and P fractions. Hot-water extractable C, N, and P increased when cultivated land was revegetated, but after 30 years the amount of hot-water extractable C, N, and P in revegetated fields was still much lower compared to native forest. Hot-water extractable fractions increased more under mixed-forest than under pure-forest stands. Furthermore, there was a significant correlation between the hot-water extractable fractions and soil chemical and microbiological properties. The results showed that hot-water extractable fractions could be used as indicators of soil quality change on the Loess Plateau.
Abstract The study was conducted in Zhifanggou Watershed, Shaanxi Province, China, to evaluate the effect of different vegetation types on hot-water extractable C, N and P fractions, with the aim to determine whether hot-water extractable fractions could be used as indicators of soil quality change in Loess Plateau. The six vegetation types established in 1975 were (i) Robinia pseudoacacia L., (ii) Caragana korshinkii Kom., (iii) Pinus tabulaeformis Carr., (iv) P. tabulaeformis-Amorpha fruticosa L., (v) R. pseudoacacia-A. fruticosa, and (vi) grassland. A cropped hillslope plot and a Platycladus orientalis L. native forest plot were used as references. The results indicated that the conversion of native forest to cropland resulted in a significant decline in the hot-water extractable C, N and P fractions. Hot-water extractable C, N, and P increased when cultivated land was revegetated, but after 30 years the amount of hot-water extractable C, N, and P in revegetated fields was still much lower compared to native forest. Hot-water extractable fractions increased more under mixed-forest than under pure-forest stands. Furthermore, there was a significant correlation between the hot-water extractable fractions and soil chemical and microbiological properties. The results showed that hot-water extractable fractions could be used as indicators of soil quality change on the Loess Plateau.
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Received: 25 October 2012
Accepted:
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| Fund: This work was financially supported by the Strategic Technology Project of Chinese Academy of Sciences, China (XDA05060300), the Science and Technology Research and Development Program of Shaanxi Province, China (2011KJXX63), and the Fundamental Research Funds for the Central Universities, China (ZD2013021). The authors thank the Ansai Research Station of Soil and Water Conservation of the Chinese Academy of Sciences for conducting laboratory analysis of soil samples and for providing fieldwork support. Thanks are given to the two anonymous reviewers and editors of the journal for their valuable comments, suggestions, and revisions of this manuscript. |
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Corresponding Authors:
LI Peng, Tel: +86-29-82312658, E-mail: lipeng74@163.com
E-mail: lipeng74@163.com
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| About author: XUE Sha, Mobile: 15209242415, E-mail: xuesha100@163.com |
Cite this article:
XUE Sha, LI Peng, LIU Guo-bin, LI Zhan-bin, ZHANG Chao.
2013.
Changes in Soil Hot-Water Extractable C, N and P Fractions During Vegetative Restoration in Zhifanggou Watershed on the Loess Plateau. Journal of Integrative Agriculture, 12(12): 2250-2259.
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