YANG Liangchen,ZHANG Nan.Water Conservation Capacity of Litter and Soil Layer in Three Mixed Forests in Along the Dam Area[J].Research of Soil and Water Conservation,2019,26(03):253-258.
沿坝地区3种混交林枯落物层与土壤层水源涵养能力
- Title:
- Water Conservation Capacity of Litter and Soil Layer in Three Mixed Forests in Along the Dam Area
- Keywords:
- along the dam area; litter layer; soil layer; water conservation
- 分类号:
- S715.3
- 摘要:
- 为了研究沿坝地区3种混交林类型枯落物层与土壤层的水源涵养能力，利用室内浸泡法与双环刀法对3种混交林的枯落物层和土壤层的水源涵养能力进行了研究。结果表明：（1）枯落物生物量大小排序为针阔混交林 > 阔叶混交林 > 针叶混交林。（2）最大持水量大小排序为：叶混交林 > 针阔混交林 > 针叶混交林；有效拦蓄量为阔叶混交林>针阔混交林>针叶混交林；持水量与浸水时间的回归方程为Q=alnt+b（R2>0.89），持水速率与浸水时间的回归方程为V=Ktn（R2>0.99）。（3）土壤总孔隙度、非毛管孔隙度和毛管孔隙度最高的均为阔叶混交林，高于其他两种混交林，说明阔叶混交林的地理环境更有利于林木的生长和涵养水源；非毛管孔隙度与土壤持水力密切相关，其大小排序与土壤持水能力相同，大小排序为阔叶混交林 > 针阔混交林 > 针叶混交林，3种林分土壤层的初渗速率差距比较大，大小排序为针叶混交林 > 阔叶混交林 > 针阔混交林，入渗速率与入渗时间回归方程为f=at-b（R2>0.94）。
- Abstract:
- In order to study the water conservation capacity of the litter layer and soil layer of three mixed forest types along the dam area, the indoor immersion method and the double ring knife method were used to examine the water conservation capacity of the litter layer and soil layer of three mixed forests. The results showed that:(1) the biomass of litter decreased in the order coniferous and broad-leaved mixed forest > broad-leaved mixed forest > coniferous mixed forest; (2) the maximum water holding capacity decreased in the sequence broad-leaved mixed forest > coniferous and broad-leaved mixed forest > coniferous mixed forest; effective storage decreased in the order broad-leaved mixed forest > coniferous and broad-leaved mixed forest > coniferous mixed forest; water holding capacity and water immersion time; the regression equation was expressed as Q=alnt+b(R2>0.89), and the regression equation of water holding rate and water immersion time was described as V=Ktn (R2>0.99); (3) the soil total porosity, non-capillary porosity and capillary porosity were higher in the broad-leaved mixed forest than the other two mixed forests, indicating that the geographical environment of broad-leaved mixed forest was more conducive to forest growth and water conservation; non-capillary porosity was closely related to soil water holding capacity, and its size was the same as soil water holding capacity, which decreased in the order broad-leaved mixed forest > coniferous and broad-leaved mixed forest > coniferous mixed forest, and the differences of initial infiltration rates of three forest layers were relatively large, and the initial infiltration rates decreased in the order coniferous mixed forest>broad-leaved mixed forest>coniferous and broad-leaved mixed forest; The regression equation of infiltration rate and infiltration time was described as f=at-b (R2>0.94).
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备注/Memo
收稿日期:2018-07-13;改回日期:2018-07-25。
基金项目:国家自然基金“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资助项目（1705488）
作者简介:杨良辰(1964-),男,河北省涉县人,本科,主要从事果林生产技术与水土保持研究。E-mail:yangliangchen@126.com
通讯作者:张楠(1986-),女,河北省围场人,学士,工程师,从事林业经营技术研究与水土保持研究。E-mail:363517454@qq.com