Ecological Stoichiometric Characteristics of Loropetalum Chinense Rhizosphere Soils at Different Vegetation Restoration Stage in Karst Region
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    Abstract:

    [Objective] To explore the ecological stoichiometric characteristics of Loropetalum chinense rhizosphere soils and to find out its nutrient use regularity and limiting factors at different vegetation restoration stages of karst region. These works were expected to provide scientific basis for decision making of vegetation restoration and reconstruction in the karst region of Northwest Guangxi Zhuang Autonomous Region.[Methods] Based on the ecological stoichiometry theory, we tested the C:N:P ratios of L. chinense rhizosphere soils sampled at two typical vegetation restoration stages (shrubland and primary forest).[Results] Soil total carbon, nitrogen and phosphorus concentrations of L. chinense rhizosphere soils in shrubland were higher than those of primary forest; while the patterns of C:N, C:P and N:P ratios were on the contrary. The C:P and N:P ratios of L. chinense rhizosphere soils were significantly different among the lower, middle, and upper slopes at the same vegetation restoration stage. In addition, the rhizosphere soil organic carbon was positively correlated with soil N:P ratio (p<0.05); Both of the soil total nitrogen and phosphorus were positively correlated with soil C:N, C:P, N:P ratios (p<0.05); and the soil C:P ratio was positively correlated with C:N and N:P ratios (p<0.05).[Conclusion] The nutrient providing status of L. chinense rhizosphere soil was mainly limited by soil N in the earlier vegetation restoration stage (shrubland), while was mainly limited by soil P in latter vegetation restoration stage (primary forest).

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梁月明,李强,潘复静.岩溶区不同恢复阶段檵木根际土壤生态化学计量学特征[J].水土保持通报英文版,2017,37(5):123-127

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History
  • Received:July 10,2017
  • Revised:July 17,2017
  • Adopted:
  • Online: November 14,2017
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