东北近天然林土壤可蚀性K值研究

李旭; 王海燕; 杨晓娟; 刘玲; 李卫松; 王岳

doi:10.13961/j.cnki.stbctb.2014.04.016

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东北近天然林土壤可蚀性K值研究

试验研究

- 东北近天然林土壤可蚀性K值研究
- Soil Erodibility K-Value of Semi-natural Forests in Northeast China
- 水土保持通报 2014年33卷第4期页码：5-10
- 作者机构：
  
  1. 北京林业大学林学院,北京,100083
  2. 北京林业大学水土保持学院,北京,100083
- 作者简介：
- 基金信息：
  
  中央高校基本科研业务费专项"典型水土流失类型区土壤可蚀性研究"(TD2011-2);国家林业局林业公益性行业科研专项(20100400201)
- DOI：10.13961/j.cnki.stbctb.2014.04.016
  中图分类号：
- 纸质出版：2014
- 稿件说明：
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李旭, 王海燕, 杨晓娟, 等. 东北近天然林土壤可蚀性K值研究[J]. 水土保持通报, 2014,33(4):5-10.

LI Xu, WANG Hai-yan, YANG Xiao-juan, et al. Soil Erodibility K-Value of Semi-natural Forests in Northeast China[J]. Bulletin of Soiland Water Conservation, 2014, 33(4): 5-10.
李旭, 王海燕, 杨晓娟, 等. 东北近天然林土壤可蚀性K值研究[J]. 水土保持通报, 2014,33(4):5-10. DOI： 10.13961/j.cnki.stbctb.2014.04.016.

LI Xu, WANG Hai-yan, YANG Xiao-juan, et al. Soil Erodibility K-Value of Semi-natural Forests in Northeast China[J]. Bulletin of Soiland Water Conservation, 2014, 33(4): 5-10. DOI： 10.13961/j.cnki.stbctb.2014.04.016.

摘要

基于吉林省汪清林业局所辖林场10块近天然林样地

采集0-20

20-40和40-60 cm土层土壤样品

对土样进行了粒径分析及养分测定。运用侵蚀-土地生产力影响评估模型(EPIC)对研究区土壤可蚀性因子K值进行了估算

分析讨论了K值的影响因素及其与土壤养分之间的相关性。结果表明

研究区内土壤可蚀性K值平均为0.060 7 t·hm

·h/(MJ·mm·hm

);0-20 cm深度的土壤可蚀性K值较20-60 cm土层土壤大

针阔混交林的K值比阔叶混交林的大;当林分密度小于1 200株/hm

郁闭度小于0.75时

K值随林分密度和郁闭度的增大而减小。K值与土壤养分的相关性由高到低依次为:全氮>速效钾>有效磷>全磷

除全氮外其他土壤养分均与K值呈负相关。最适林分密度为750~1 200株/hm

在该密度下各土壤养分含量状况较好且土壤抗蚀能力较高。

Abstract

The soil particle size distribution and soil nutrients contents in the soil depth of 0-20 cm

20-40 cm and 40-60 cm were analyzed

the soil sampling got from ten semi-natural forest plots in forest farms of Wangqing Forestry Bureau

Jilin Province. In addition

the soil erodibility K-value in this region was investigated with the formula calculation method of EPIC(erosion productivity impact calculator) and its affecting factors

the correlation between K-value and soil nutrients were discussed. The results indicated that the mean K-value was 0.060 7 t·hm2·h/(MJ·mm·hm2). The K-value at the soil depth of 0-20 cm was higher than that at 20-60 cm. Higher K-values were found in coniferous and broad-leaved mixed forest than broad-leaved mixed forest. The K-value decreased with increasing stand density and canopy density when stand density was less than 1 200 hm2 and canopy density less than 0.75. The correlations between K-value and soil nutrients were in a descending order of total nitrogen

readily available potassium

available phosphorus and total phosphorus in the study area. All soil nutrients were negatively correlated with K-value except total nitrogen. The optimal stand density was about 750~1 200 trees/hm2 with higher soil nutrient concentrations and soil anti-erodibility.

关键词

Keywords

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