摘要
为了探讨水曲柳落叶松混交林的增产机理，文章从土壤理化性质、营养元素含量等方面，对桦南县孟家岗林场２２年生落叶松纯林和水落混交林进行了调查分析。结果表明：混交林在较大幅度上改善了土壤的物理性质。混交林下土壤表层和底层容重分别比纯林降低１２．３８％和１８．７４％；总孔隙度提高１４．５１％和７．０１％；渗透速度分别比纯林提高６４．６０％和５２．１７％。混交林虽未能提高土壤ｐＨ值和全量元素含量，但表层土壤的速效养分含量明显高出纯林。
The physical and chemical properties of soils under 22-year old larch(Larix olgensis)and larch-ash(Fraxinus mandshurica)mixture stands were studied in this paper. The results showed:the physical properties of the soil within the mixture is improved by large extent;he situation of soil phases(solid.gaseous and liquid)is better for the releasing of nutrients from the organic materials and helpful for the penetration and growth of the root systems.mean while.the nutrient content of soil within the mixture.especially organic substance and available nutrients(N.P. K).are higher than that in the pure larch stand.Conclude that the mixture stand is better for sustaining soil fertility of forest stand.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
1994年第6期24-29,共6页
Journal of Northeast Forestry University
基金
国家自然科学基金
关键词
落叶松
水曲柳
混交林
土壤理化性质
Larch
Ash
Mixture stand
Physical and chemical properties of soil
