JOURNAL OF NATURAL RESOURCES ›› 2015, Vol. 30 ›› Issue (10): 1642-1652.doi: 10.11849/zrzyxb.2015.10.004

• Resource Ecology • Previous Articles     Next Articles

Soil-plant-litter Stoichiometry under Different Site Conditions in Yanhe Catchment, China

XIANG Yun1, 4, CHENG Man1, AN Shao-shan1, 2, ZENG Quan-chao2, 3   

  1. 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, Research Centerof Soil and Water Conservation and Ecological Environment, CAS and Ministry of Education,Yangling 712100, China;
    3. University of Chinese Academy of Sciences, Beijing 100049,China;
    4. Shanxi Academy of Environmental Research, Taiyuan 030000 China
  • Received:2014-09-10 Revised:2015-04-23 Online:2015-10-15 Published:2015-10-15

Abstract: Based on the investigation of the plant, litter and soil under different site conditions in Yanhe catchment, we selected Lespedeza davurica (Laxm.) Schindl as common plant, and studied the C, N, P stoichiometry of plant, litter and soils in this paper. We also discussed the migration, conversion and limition of the elements. The results showed that: 1) Soil C/N was 10.88, and soil C/P and N/P ratios were 23.14 and 2.13. 2) Soil C/N and C/P decreased as follows: sunny slope>shady slope; gully slope > hill slope; there was no significant difference in soil N/P under different site conditions. Plant C/N decreased as follows: sunny slope > shady slope; hill slope > gully slope; whereas plant C/P and N/P decreased as follows: shady slope >sunny slope; hill slope > gully slope. Litter C/N decreased as follows: shady slope > sunny slope; hill slope > gully slope; litter C/P and N/P decreased as follows: shady slope > sunny slope, gully slope> hill slope. 3) The C, N, P stoichiometry of plant, litter and soil reflected higher rate of soil organic carbon accumulation in gully slope than in hill slope, and higher rate in sunny slope than in shady slope. Soil P was similar under different site conditions. In the later stage of plant growth and the decomposition of litter, the migration and conversion of N was observed in sunny slope and hill slope, whereas the migration and conversion of P were usually observed in shady slope and gully slope.

CLC Number: 

  • S154