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FOREST RESOURCES WANAGEMENT ›› 2017, Vol. 0 ›› Issue (5): 66-73.doi: 10.13466/j.cnki.lyzygl.2017.05.012

• Scientific Research • Previous Articles     Next Articles

Stoichiometric Characteristics of Litter and Soils in Water Conservation Forests of Karst Plateau Mountainous Region

QIN Shiyi1(), YU Yanghua2(), XING Rongrong3, WANG Lu1   

  1. 1. School of Geography and Environmental Science,Guizhou Normal University,Guiyang 550025,China
    2. School of Karst Science,Guizhou Normal University,Guiyang 550001,China
    3. School of Resources and Environmental Engineering,Guizhou University,Guiyang 550025,China
  • Received:2017-05-31 Revised:2017-08-15 Online:2017-10-28 Published:2020-09-24
  • Contact: YU Yanghua E-mail:15885501304@163.com;yuyanghua2003@163.com

Abstract:

It is helpful to understand the nutrient status by ascertaining stoichiometric characteristics of the litter and soil of water conservation forests in the rocky desertification area.In this paper,the forests of Pinus yunnanensis,Betula luminifera and Populus alba,Quercus variabilis and Corylus heterophylla,Populus alba and Betula luminifera,Rhododendron simsii and Populus alba and Betula luminifera in the karst plateau mountainous were used to study the organic C,TN,TP stoichiometry and intrinsic association of litter and soil.The results show that soil organic C,TN and TP in Karst communities occurred primarily in the top 0~20 cm soil layer,at 25.02 mg/g C,1.56 mg/g N and 0.33 mg/g P,with ratios of 15.13 for C:N,78.40 for C:P and 5.17 for N:P.The litter organic C,TN,TP content were estimated at 407.09 mg/g,16.07 mg/g,2.06 mg/g,and the corresponding C:N,C:P and N:P were 25.67,212.87 and 8.38,respectively.In general,litter layer had higher C:N,C:P and N:P than soil layer.There is a significant positive correlation between C:P and N:P in litter layer or soil layer,the correlation between soil C:N and litter C:N was negative.Besides,there was a significant negative correlation between soil C:N and litter N:P.Nutrition of N and P in soil is deficient,the litter has a clear structure of low C,high N and high P.The capacity of holding nutrient for soil is not strong.

Key words: water conservation forest, litter, soil, ecological stoichiometry, karst plateau mountain region

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