| 滇中尖山河流域不同土地利用类型土壤抗蚀性 |
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| 引用本文： | 张华渝,王克勤,宋娅丽.滇中尖山河流域不同土地利用类型土壤抗蚀性[J].水土保持学报,2019,33(5):50-57. |
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| 作者姓名： | 张华渝 王克勤 宋娅丽 |
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| 作者单位： | 西南林业大学生态与水土保持学院 |
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| 基金项目： | 云南省重点研发计划项目（2018BC001）；国家自然科学基金项目（30660037）；云南省应用基础研究青年项目（2016FD044）；云南省高校优势特色重点学科（生态学）建设项目（050005113111） |
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| 摘 要： | 为揭示滇中尖山河小流域不同土地利用类型的侵蚀特性,以滇中尖山河小流域4种不同土地利用类型(坡耕地、裸地、林地、园地)不同土层(0—10,10—20,20—30 cm)土壤为研究对象,通过对土壤抗蚀性15个指标的测定与分析,研究了不同土地利用类型对土壤抗蚀性的影响。结果表明:不同土地利用类型中坡耕地、裸地5 mm土壤水稳性团聚体显著低于林地、园地,5 mm水稳性团聚体含量表现为裸地(12.72%)大于坡耕地(8.93%),且坡耕地0.25 mm团聚体随土层深度的增加而降低;土壤团聚体结构破坏率表现为裸地坡耕地林地园地,土壤有机碳含量与0.25 mm水稳性团聚体含量均达到极显著正相关。不同土地利用类型下园地和林地土壤的抗蚀指数、结构系数、团聚度、土壤结构和稳定性、抗分散强度和保水保肥能力最高,水稳性指数较大,分散系数最小,土壤抗蚀性能最强。不同土地利用类型综合抗蚀指数大小顺序为园地(0.823 6)林地(0.520 4)坡耕地(-0.382 2)裸地(-0.961 8)。综上,实行人工造林能够显著提高原土结构稳定性,园地和林地在增加土壤抗蚀性方面有明显优势,加强人工林建设可作为研究区土壤改良的有效措施。
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| 关 键 词： | 土壤抗蚀性 主成分分析 不同土地利用类型 滇中尖山河流域 |
| 收稿时间： | 2019/3/31 0:00:00 |
Soil Erosion Resistance Under Different Land Use Types in Jianshan River Watershed in Middle Yunnan Province |
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| ZHANG Huayu,WANG Keqin,SONG Yali.Soil Erosion Resistance Under Different Land Use Types in Jianshan River Watershed in Middle Yunnan Province[J].Journal of Soil and Water Conservation,2019,33(5):50-57. |
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| Authors: | ZHANG Huayu WANG Keqin SONG Yali |
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| Institution: | College of Ecology and Soil & Water Conservation, Southwest Forestry University, Kunming 650224 |
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| Abstract: | In order to reveal the erosion characteristics under different land use types in Jianshan River watershed in central Yunnan Province, the soil in different soil layers (0-10, 10-20 and 20-30 cm) under four different land use types (sloping farmland, bare land, forest land and garden land) was taken as the research object. The effects of different land use types on soil erosion resistance were studied by measuring and analyzing 15 soil erosion resistance indexes. The results showed that the contents of>5 mm water-stable aggregates in sloping farmland and bare land were significantly lower than those in forestland and garden land. The content of>5 mm water-stable aggregates in sloping farmland (12.72%) was higher than that in sloping farmland (8.93%), and the contents of>0.25 mm aggregates in sloping farmland decreased with the increase of soil depth. The structural failure rate of soil aggregates was bare land > sloping farmland > forest land > garden land. The soil organic carbon contents were significantly positively correlated with the contents of>0.25 mm water stable aggregates. Under different land use types, forest land and garden land had the highest corrosion resistance index, structure coefficient, agglomeration degree, soil structure and stability, dispersive strength, water and fertilizer retention capacity, the larger water stability index, the smallest dispersion coefficient and the strongest corrosion resistance. The order of the comprehensive corrosion resistance index of different land use types was garden land (0.823 6) > forest land (0.520 4) > sloping farmland (-0.382 2) > bare land (-0.961 8). In conclusion, artificial afforestation could significantly improve the structural stability of the original soil, and garden land and forest land had obvious advantages in increasing soil erosion resistance. Strengthening plantation construction could be an effective measure for soil improvement in the study area. |
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| Keywords: | soil corrosion resistance principal component analysis different types of land use Jianshan river watershed in middle Yunnan Province |
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