[1]ZHANG Jianbing,LUO Weiqun,ZHANG Haian,et al.Response of Soil Structure to Different Cultivation Patterns in the Typical Karst Peak-Cluster Depression of Northwest Guangxi[J].Research of Soil and Water Conservation,2019,26(02):37-42,48.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
26
Number of periods:
2019 02
Page number:
37-42,48
Column:
Public date:
2019-04-28
- Title:
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Response of Soil Structure to Different Cultivation Patterns in the Typical Karst Peak-Cluster Depression of Northwest Guangxi
- Author(s):
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ZHANG Jianbing1,2,3, LUO Weiqun1, ZHANG Haian2,3, HE Liuchun2,3, YANG Qiyong1, HU Baoqing2,3
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1. Key Laboratory of Karst Ecosystem and Rocky Desertification Control, Ministry of Land and Resources, Guilin, Guangxi 541004, China;
2. Key Laboratory of Environment Change and Resources Use in Beibu Gulf, Guangxi Teachers Education University, Ministry of Education, Nanning 530001, China;
3. Guangxi Key Laboratory of Earth Surface Processes and Intelligent Simulation, Guangxi Teachers Education University, Nanning 530001, China
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- Keywords:
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soil structure; cultivation patterns; conservation tillage; karst peak cluster farming area; northwest of Guangxi
- CLC:
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S152.4;S152.5
- DOI:
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- Abstract:
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Because of the wide distribution and high risk of rocky desertification, the northwest Guangxi, characterized by karst peak-cluster depression, is a typical ecological fragile and poor region. It is important to evaluate the soil quality under different land uses, to strengthen ecological restoration and to increase peasants’ income in karst peak-cluster depression farming area because the soil problem and unscientific human activities are considered to be the key factors that cause the rocky desertification. Based on the Guohua Karst Ecological Research Base (founded in beginning of 2001), the objectives of this paper are to evaluate soil structure dynamics under three cultivation patterns, Hylocereus undatus (HLG), maize (YMD) and sugarcane (GZD) cultivation, which was representative of the no-tillage, plowing and straw returning, respectively. The results showed that, compare to conversion of cropland to forest (LD), HLG, YMD and GZD decreased the contents of soil macroaggregate significantly both by the methods of wet sieving and dry sieving, the content of >l0 mm soil macroaggregate was 17.99% in the patter of YMD under wet sieving, and 9.29% in dry sieving, and the contents of LD were 85.36% and 59.55% in the pattern of LD. Also, the mean weight diameter and geometric mean diameter by wet sieving and dry sieving decreased in the order: LD>HLG>GZD>YMD. Soil particle size changed with the cultivation pattern obviously, the particle size decreased in the order: YMD > LD > HLG > GZD, LD > HLG > YMD > GZD and GZD > HLG > LD > YMD presented in 0.01~2 μm, 2~20 μm and 20~2 000 μm respectively. However, the soil bulk density increased in the pattern of YMD with the highest value of 1.28 g/cm3 and the lowest value of soil porosity 51.52%. Consequently, it is suggested that Hylocereus undatus plantation is beneficial for karst peak-cluster depression area because of its strong ability of soil structure maintenance and high economic benefits.