黄土丘陵沟壑区欧李人工林对坡面土壤分形特征及可蚀性的影响

李金峰; 刘林; 薛丽萍; 孙雁君; 杜俊杰; 王鹏飞

doi:10.13961/j.cnki.stbctb.2017.02.003

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黄土丘陵沟壑区欧李人工林对坡面土壤分形特征及可蚀性的影响

试验研究

- 黄土丘陵沟壑区欧李人工林对坡面土壤分形特征及可蚀性的影响
- Effects of Cerasus Humilis on Soil Fractal Characteristics and Erodibility on Sloping Cropland in Loess Hilly and Gully Region
- 水土保持通报 2017年37卷第2期页码：21-26
- 作者机构：
  
  1. 山西省水土保持科学研究所,山西,太原,030045
  2. 山西农业大学园艺学院, 山西太谷,030801
- 作者简介：
- 基金信息：
  
  山西省科技重大专项“经济型灌木（钙果）在山西生态脆弱区、工矿区生态恢复重建中的应用研究与示范”（20121101010）
- DOI：10.13961/j.cnki.stbctb.2017.02.003
  中图分类号：
- 纸质出版：2017
- 稿件说明：
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李金峰, 刘林, 薛丽萍, 等. 黄土丘陵沟壑区欧李人工林对坡面土壤分形特征及可蚀性的影响[J]. 水土保持通报, 2017,37(2):21-26.

LI Jinfeng, LIU Lin, XUE Liping, et al. Effects of Cerasus Humilis on Soil Fractal Characteristics and Erodibility on Sloping Cropland in Loess Hilly and Gully Region[J]. Bulletin of Soiland Water Conservation, 2017, 37(2): 21-26.
李金峰, 刘林, 薛丽萍, 等. 黄土丘陵沟壑区欧李人工林对坡面土壤分形特征及可蚀性的影响[J]. 水土保持通报, 2017,37(2):21-26. DOI： 10.13961/j.cnki.stbctb.2017.02.003.

LI Jinfeng, LIU Lin, XUE Liping, et al. Effects of Cerasus Humilis on Soil Fractal Characteristics and Erodibility on Sloping Cropland in Loess Hilly and Gully Region[J]. Bulletin of Soiland Water Conservation, 2017, 37(2): 21-26. DOI： 10.13961/j.cnki.stbctb.2017.02.003.

摘要

[目的] 研究中国特有经济作物欧李对坡面土壤性质的影响，为其在黄土丘陵沟壑区推广种植提供参考依据。[方法] 布设5块立地条件不同的试验样地，在汛期前后，分别对各样地土壤相关指标进行测定，利用PSD分形模型及EPIC土壤抗侵蚀模型，定量分析欧李对坡面土壤颗粒分形维数及抗侵蚀能力的影响。[结果]（1）在汛期，欧李人工林对坡面土壤黏粒具有显著的拦截作用，鱼鳞坑式欧李林可有效保护坡顶处土壤，水平阶式欧李林在坡中、坡底位置可有效拦截径流中的土壤细颗粒并富集黏粒；（2）坡面土壤分形维数与土壤砂粒含量呈显著负相关，相关系数为-0.611；与土壤黏粒含量呈显著正相关，相关关系为0.770；（3）欧李林的种植可降低研究区土壤可蚀性因子K值，提高土壤抗侵蚀能力，不同整地方式下欧李林对土壤可蚀性因子K值的影响效果总体表现为：水平阶 > 鱼鳞坑 > 自然坡；（4）土壤可蚀性因子K值与土壤的有机质和黏粒含量呈极显著负相关，相关系数分别为-0.957，-0.928；与土壤容重、砂粒含量和粉粒含量呈显著正相关，相关系数分别为0.704，0.667，0.512。[结论] 种植欧李对黄土丘陵沟壑区控制坡耕地黏粒流失，提高土壤有机质含量，优化土壤结构，增强土壤抗蚀能力具有积极的意义。

Abstract

[Objective] Cerasus humilis were unique economic fruit trees in China

its effects on soil physicochemical properties of slope field were studied to provide scientific basis for the extension and plantation in loess hilly area. [Methods] Relevant indexes of 5 fields with different standing conditions were measured before and after flood season. The effects of planting Cerasus humilis on soil fractal feature and soil erodibility on sloping cropland were analyzed by models of particle size distribution(PSD) and erosion-productivity impact calculator(EPIC). [Results] (1) During the flood season

planting had obviously buffer function against movement of soil clay particles on slop. Plantation in fish scale-like pit could effectively protect the slope surface soil; Plantation in level-terrace pit had significant effects on the interception and enrichment of soil fine particles in the middle and bottom of slope. (2) Soil fractal dimension was correlated negatively with soil sand particles with a coefficient of-0.611; while it had an significantly opposite correlation with clay particles

the correlation coefficient was 0.770. (3) By planting Cerasus humilis

the value of soil erodibility K could be reduced

correspondingly the anti-erosion ability could be improved. The effects on soil erodibility Kunder different land preparation methods of Cerasus humilis plantation had a rank as follows: level-terrace > scale-like > natural slope. (4) Negative correlations between soil erodibility K and the contents of organic matter and soil clay particles

their correlation coefficients were -0.957

-0.928

respectively. And positive correlations between K and soil bulk density

soil sand particles and soil silt particles

the correlation coefficients were 0.704

0.667 and 0.512. [Conclusion] Planting Cerasus humilis had positive significance to control soil clay particles loss

to increase organic matter content

to optimize soil structure

and to improve anti-erosion ability.

关键词

Keywords

references

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