Journal of Guangxi Normal University(Natural Science Edition) ›› 2015, Vol. 33 ›› Issue (3): 151-156.doi: 10.16088/j.issn.1001-6600.2015.03.023

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The Characteristic of Soil Aggregate Structure in Different Artificial Forest Soils with Different Sieve Strength in Karst Region of Northeast Guangxi, China

HU Le-ning1,2, DENG Hua1,2, WU Hua-jing1,3, WU Dao-ning1,2, LIANG Shi-chu1,3   

  1. 1.Key Laboratory of Ecology of Rare and Endangered Species and Environmental Conservation of Education Ministry,Guangxi Normal University,Guilin Guangxi 541004, China;
    2. College of Resource and Environmental Science, Guangxi Normal University, Guilin Guangxi 541004, China;
    3. College of Life Science, Guangxi NormalUniversity, Guilin Guangxi 541004, China
  • Received:2015-03-20 Online:2015-05-10 Published:2018-09-20

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Abstract: In order to know the soil aggregate characteristic on artificial forest soils with different sieve strength, four artificial forest soils with 1.5 mm and 2.5 mm sieve strength (Phyllostachys edulis forest, Cunninghamia lanceolata forest, Eucalptus grandis×E. urophylla forest and Pinus massoniana forest) were selected for study by means of AS200 in Northeast Guangxi. Soil aggregate were obtained with dry sieving method and MWD for soil stability analysis. The result shows that there are no significant difference between Cunninghamia lanceolata forest and Eucalptus grandis×E.urophylla, but both significantly greater than Phyllostachys edulis forest and Pinus massoniana forest. The particle content ranging from 0.5-1 mm to 0.25-0.5 mm and <0.25 mm with Eucalptus grandis×E. urophylla forest growing negatively while Phyllostachys edulis forest and Cunninghamia lanceolata forest growing positively. The content of SOC (Cunninghamia lanceolata forest, Eucalptus grandis×E. urophylla forest and Pinus massoniana forest) increased while soil aggregate decreased.From the point of view of soil aggregate, it benefits the stability of Phyllostachys edulis forest soil, while go against soil stability of Pinus massoniana forest. There are significant differences among four artificial forest soils, and it was directly affected by the different sieve strength in Karst soil.

Key words: karst, sieve strength, mechanical classification, mean weight diameter

CLC Number: 

  • O415.3
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