ZHANG Zhou,XIE Xian-jian,LI Xiang,et al.Study on Soil Anti-erodibility of Different Eucalyptus Grandis Types in Hilly Area of Central Sichuan Basin[J].Research of Soil and Water Conservation,2014,21(02):1-5.
川中丘陵区不同巨桉林地模式下土壤抗蚀性研究
- Title:
- Study on Soil Anti-erodibility of Different Eucalyptus Grandis Types in Hilly Area of Central Sichuan Basin
- Keywords:
- Eucalyptus grandis; soil anti-erodbility; dry sieving aggregates; mechanical composition; water stability index
- 分类号:
- S157.1;S152.3
- 摘要:
- 以川中丘陵区3.5 a生巨桉纯林、巨桉+果树、巨桉+粮食作物3种栽培模式下土壤作为研究材料，弃耕地作为对照，通过对土壤机械组成、土壤干筛团聚体、土壤崩解速率、土壤水稳性指数（K值）等指标的测定和分析，研究了不同巨桉林地对土壤可蚀性的影响。结果表明：不同模式下土壤的机械组成差异极显著，物理性黏粒含量纯林 > 弃耕地 > 林果 > 林粮，砂粒含量林粮 > 林果 > 弃耕地 > 纯林；不同模式下土壤干筛团聚体组成差异极显著；土壤崩解速率总体上表现为纯林 < 弃耕地 < 林果 < 林粮，且纯林的静水崩解率在垂直方向上增大，林果、林粮、弃耕相反；水稳性指数总体表现为纯林 > 弃耕地 > 林果 > 林粮，垂直方向上，纯林K值减小，其它模式K值均增加。通过以上抗蚀性指标的分析，可以认为不同模式土壤的抗蚀性由强到弱依次为巨桉纯林 > 弃耕地 > 林果 > 林粮。
- Abstract:
- By choosing soil of 3.5-year-old Eucalyptus grandis plantations such as pure Eucalyptus grandis, Eucalyptus grandis+grain crops, Eucalyptus grandis+fruits as researching sites, and abandoned farmlands as control, soil anti-erodibility including the mechanical composition, the drying sieve aggregate, disintegration rate, water stable index in hilly area of central Sichuan basin were inverstigated. The results showed that there was significant difference among the soil mechanical composition of different land model. The physical clay content was in the sequence of pure Eucalyptus grandis > abandoned farmlands > Eucalyptus grandis+fruits > Eucalyptus grandis+grain crops.The sand grain content was in the order of pure Eucalyptus grandis < abandoned farmlands < Eucalyptus grandis+fruits < Eucalyptus grandis+grain crops. There was significant difference among the drying sieve aggregate composition of different land models. The order of soil collapse rate follow the sequence of pure Eucalyptus grandis < abandoned farmlands < Eucalyptus grandis+fruits < Eucalyptus grandis+grain crops. Fouthermore, the soil collapse rate of pure Eucalyptus grandis increased in vertical direction insteadly, but decreased in the other 3 models. The order of water stable index was pure Eucalyptus grandis > abandoned farmlands > Eucalyptus grandis+fruits > Eucalyptus grandis+grain crops. On the other hand, the water stable index of pure Eucalyptus grandis reduced in vertical direction, insteadly, but increased in the other 3 models. According to the above analysis, the conclusion was that the order of soil anti-erodibility of different land types was in the sequence of pure Eucalyptus grandis < abandoned farmlands < Eucalyptus grandis+fruits < Eucalyptus grandis+grain crops.
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备注/Memo
收稿日期:2013-07-01;改回日期:2013-07-22。
基金项目:四川省教育厅重点自筹项目（13ZA0006）；内江师范学院大学生创新性实验计划项目（X201206）
作者简介:张洲(1988-),男,四川南充人,学士,研究方向:水土保持理论及技术研究。E-mail:243109520@qq.com
通讯作者:谢贤健(1978-),男,四川广汉人,博士,副教授,研究方向:水土保持理论及技术研究。E-mail:xxj007-14@tom.com