Journal of Guangxi Normal University(Natural Science Edition) ›› 2021, Vol. 39 ›› Issue (3): 122-130.doi: 10.16088/j.issn.1001-6600.2020033103

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Variation of Soil Temperature and Moistureat Different Successional Stages of Loropetalum chinense Communities in Karst Hills of Guilin, China

MO Yanhua1,2,3, ZOU Han1,3, MA Jiangming1,2,3*, LI Yufeng1,2,3, JIAN Rui1,2,3, QIN Jiashuang1,2,3, SONG Zunrong1,2,3, LIN Zhengzhong1,3   

  1. 1. Institute for Sustainable Development and Innovation, Guangxi Normal University, Guilin Guangxi 541006, China;
    2. Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin Guangxi 541006, China;
    3. College of Life Sciences, Guangxi Normal University, Guilin Guangxi 541006, China
  • Received:2020-03-31 Revised:2020-10-25 Published:2021-05-13

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Abstract: Analyzsis of the variation of soil temperature and moisture at different successional stages of Loropetalum chinense communities in karst hills of Guilin is a key basis for the understanding of the successional laws of L. chinense natural forests in karst hills of Guilin. The soil temperature and moisture sensors EM50 were used to continuously monitor temperature and humidity in different soil layers (0, 5 and 10 cm) of shrub stage, shrub to tree stage and small tree stage of L. chinense communities in karst hills of Guilin between March 2017 and February 2018. The variation of soil temperature and moisture at the three successional stages were analyzed. The study results indicated that, (1) The diurnal variation curve of soil temperature in different seasons showed the same sinusoidal curve in each soil layer at different successional stages of L. chinense communities. Except in summer, the diurnal variation of soil moisture was relatively stable. (2) The soil temperature of each soil layer reached the highest temperature in August (25.55±0.66—26.75±0.72 ℃) and the lowest temperature in January (9.13±2.82—11.04±1.90 ℃) at different successional stages, respectively. The soil moisture of each soil layer reached the maximum value from June to July (28.19%±1.99%—36.06%±3.86%) and minimum value from October to November (10.97%±1.09%—18.26%±0.44%). (3) The soil temperature of each soil layer decreased with succession in each month at different successional stages of L. chinense communities. And soil moisture of 0 cm layer increased with succession at different successional stages of L. chinense communities. In the deep soil layers, soil moisture didn’t show a obvious trend along the successional gradient of L. chinense communities. To sum up, the soil environment gradually recovered from high temperature and low humidity to low temperature and high humidity trend along the successional gradient of L. chinense communites. The results provide a theoretical basis for the synergy of natural succession development and environmental factors of L. chinense communities in karst hills of Guilin, China.

Key words: soil temperature and moisture, succession, Loropetalum chinense communities, karst hills of Guilin

CLC Number: 

  • S714.2
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