退化华北落叶松林枯落物对近自然经营的短期响应

被引:13
作者
董伯骞
黄选瑞
夏明瑞
机构
[1] 河北农业大学
关键词
华北落叶松; 近自然经营措施; 枯落物; 持水性能;
D O I
10.16843/j.sswc.2011.03.010
中图分类号
S714 [森林土壤学];
学科分类号
0903 ; 090301 ;
摘要
以冀北山地退化华北落叶松人工林为研究对象,探讨枯落物持水性能对不同经营措施3年内的短期响应,为深入研究近自然经营对森林水土保持功能的影响提供理论依据。结果表明:1)皆伐带(封禁+带状皆伐+人工存进更新)内枯落物储量先增加后减少,保留带(只封禁)内持续增加;2)最大持水率增幅为皆伐带15 m(72.54%)>皆伐带30 m(49.54%)>保留带(27.03%),有效拦蓄率增幅为皆伐带15 m(110.13%)>皆伐带30 m(83.27%)>保留带(40.64%),最大持水量增幅为保留带(175.96%)>皆伐带15 m(70.39%)>皆伐带30 m(47.01%),有效拦蓄水量增幅为保留带(204.99%)>皆伐带30 m(141.96%)>皆伐带15 m(50.37%);3)人工促进更新2年后白桦幼林地枯落物储量、最大持水量和有效拦蓄水量都高于华北落叶松和蒙古栎幼林地。因此,近自然经营措施在短期内可显著增强林地枯落物层水土保持功能,是恢复退化华北落叶松林生态功能的有效手段。
引用
收藏
页码:52 / 58
页数:7
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