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Journal of Arid Land  2015, Vol. 7 Issue (2): 216-223    DOI: 10.1007/s40333-014-0043-3
Research Articles     
Response of soil nitrogen, phosphorous and organic matter to vegetation succession on the Loess Plateau of China
Man CHENG1,2, ShaoShan AN1,2
1 College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China;
2 State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling 712100, China
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Abstract  Revegetation is a traditional practice widely used for soil protection. We evaluated the effect of natural revegetation succession on soil chemical properties and carbon fractions (particulate organic carbon (POC), humus carbon (HS-C), humic acid carbon (HA-C) and fulvic acid carbon (FA-C)) on the Loess Plateau of China. The vegetation types, in order from the shortest to the longest enclosure duration, were: (a) abandoned overgrazed grassland (AbG3; 3 years); (b) Hierochloe odorata Beauv. (HiO7; 7 years); (c) Thymus mongolicus Ronnm (ThM15; 15 years); (d) Artemisia sacrorum Ledeb (AtS25; 25 years); (e) Stipa bungeana Trin Ledeb (StB36; 36 years) and (f) Stipa grandis P. Smirn (StG56; 56 years). The results showed that the concentrations of soil organic carbon, total nitrogen and available phosphorus increased with the increase of restoration time except for ThM15. The concentration of NH4-N increased in the medium stage of vegetation restoration (for ThM15 and AtS25) and decreased in the later stage (for StB36 and StG56). However, NO3-N concentration significantly increased in the later stage (for StB36 and StG56). Carbon fractions had a similar increasing trend during natural vegetation restoration. The concentrations of POC, HS-C, FA-C and HA-C accounted for 24.5%–49.1%, 10.6%–15.2%, 5.8%–9.1% and 4.6%–6.1% of total carbon, respectively. For AbG3, the relative changes of POC, HS-C and FA-C were significantly higher than that of total carbon during the process of revegetation restoration. The higher relative increases in POC, HS-C and FA-C confirmed that soil carbon induced by vegetation restoration was sequestrated by higher physical and chemical protection. The increases of soil C fractions could also result in higher ecology function in semiarid grassland ecosystems.

Key wordsStipa grandis      Stipa krylovii      disturbance      Maodeng pasture      reproductive strategy     
Received: 13 March 2014      Published: 10 April 2015

This study was supported by the National Natural Sciences Foundation of China (41171226), the Program for New Cen¬tury Excellent Talents in University (NCET-12-0479) and the Foundation for Youths Teacher by Northwest A&F University.

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Cite this article:

Man CHENG, ShaoShan AN. Response of soil nitrogen, phosphorous and organic matter to vegetation succession on the Loess Plateau of China. Journal of Arid Land, 2015, 7(2): 216-223.

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