YANG Liangchen,ZHANG Chunru.Comprehensive Evaluation of Water Conservation Capacity in Litter and Soil Layer of Three Typical Forest Types Along the Highland Area[J].Research of Soil and Water Conservation,2018,25(06):177-182.
沿坝地区3种典型林分类型枯落物层与土壤层水源涵养能力综合评价
- Title:
- Comprehensive Evaluation of Water Conservation Capacity in Litter and Soil Layer of Three Typical Forest Types Along the Highland Area
- Keywords:
- highland area; litter layer; soil layer; water conservation
- 分类号:
- S714.7;S715
- 摘要:
- 为了研究沿坝地区3种典型林分的枯落物层与土壤层的水源涵养能力，利用熵权法对林分的枯落物层和土壤层的相关因子进行了综合评价。结果表明：（1）枯落物层最大持水量：针阔混交林 > 油松林 > 落叶松纯林；有效拦蓄量：针阔混交林 > 油松林 > 落叶松纯林。（2）持水量与浸水时间的回归方程为Q=alnt+b（R2 > 0.97），持水速率与浸水时间的回归方程为V=Ktn（R2 > 0.94）。（3）3种林分类型土壤总孔隙度的排序为：针阔混交林 > 油松纯林 > 落叶松纯林；土壤持水能力大小排序为：针阔混交林 > 落叶松纯林 > 油松纯林；3种林分土壤层的初渗速率差距比较大，大小排序为：针阔混交林 > 落叶松纯林 > 油松纯林；林分的稳渗速率大小排序为：针阔混交林 > 落叶松纯林 > 油松纯林；入渗速率与入渗时间回归方程为：f=at-b（R>0.96）。（4）利用熵权法计算得出的权重大小排序为：枯落物最大持水量 > 枯落物有效拦蓄量=土壤持水力 > 初渗速率 > 土壤毛管孔隙度 > 土壤容重 > 枯落物蓄积量=土壤非毛管孔隙度，3种林分类型综合评分排序为：针阔混交林 > 油松纯林 > 落叶松纯林。针阔混交林为最优的水源涵养林，其在保持水土、涵养水源方面功能最强。
- Abstract:
- In order to study the water conservation ability of the litter layer and soil layer of 3 typical stands along the highland area, the entropy weight method was used to evaluate the relative factors of the litter and soil layers. The results showed that: (1) the maximum water holding capacity of the litter layer decreased in the order: Coniferous and broad-leaved forest > Pinus tabuliformis forest > Larix gmelinii pure forest; the effective retention amount decreased in the order: Coniferous and broad-leaved forest > Pinus tabuliformis forest > Larix gmelinii pure forest; (2) the regression equation of water holding capacity and soaking time was presented as Q=alnt+b(R2 > 0.97), and the regression equation of water holding rate and soaking time was presented as V=Ktn(R2 > 0.94); (3) the total soil porosity of 3 types of forest types decreased in the order: Coniferous and broad-leaved mixed forest > Pinus tabuliformis forest > Larix gmelinii pure forest; the soil water holding capacity decreased in the order: Coniferous and broad-leaved mixed forest > Larix gmelinii pure forest > Pinus tabuliformis forest; the initial infiltration rate of soil layer of 3 kinds of stand was larger, the size decreased in the order: Coniferous broad-leaved mixed forest > Larix gmelinii pure forest > Pinus tabuliformis forest; the stable infiltration rate of the stand decreased in the oder: Coniferous and broad-leaved mixed forest > Larix gmelinii pure forest > Pinus tabuliformis forest; the regression equation of infiltration rate and infiltration time was presented as f=at-b(R > 0.96); (4) the weights calculated by the entropy weight method followed the sequence: the maximum water holding capacity of the litter > the effective blocking amount of the litter=soil water holding capacity > initial infiltration rate > soil capillary porosity > soil bulk weight > litter volume=soil non capillary porosity, and comprehensive scoring of 3 types of forest type decreased in the order: Coniferous and broad-leaved mixed forest > Pinus tabuliformis forest > Larix gmelinii pure forest. Coniferous and broad-leaved mixed forest is the best water conservation forest, which has the strongest function of soil and water conservation.
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备注/Memo
收稿日期:2018-02-07;改回日期:2018-02-24。
基金项目:国家自然科学基金“基于森林空间结构的华北落叶松人工林种子萌发及幼苗成活机制研究”（31500523）；河北省林业厅科学技术研究计划（1705488）
作者简介:杨良辰(1964-),男,河北涉县人,本科,主要从事果林生产技术与水土保持研究。E-mail:937962206@qq.com
通讯作者:张春茹(1975-),女,河北围场人,副高,主要从事林业经济管理和水土保持研究。E-mail:927293733@qq.com