摘要
研究表明，人工杉木林地土壤有机物和养分库严重退化，地表枯枝落叶层中干物质和各种养分的贮量与阔叶林和混交林比较明显下降，土壤中有机质、全Ｎ量和碱解Ｎ含量的剖面分布也表现出相同的趋势。传统的炼山造林使杉木林地枯枝落叶和养分库呈突变形式退化，林份组成单一，凋落物数量和养分含量少也是杉木林土壤有机物和养分库退化的重要因素。通过改进林木更新方式和改善林份组成可以在很大程度上控制人工林有机物和养分库的退化。
Summary This Paper reported severe degradation of soil organic matter and nutrient Pool under CF (artificial Chinese fir forest). Remarkable drop of litter matter and its nutrients under CF were observed compared with those under BF (natural broad- leaved forest) and MF (official mixed forest of Chinese fir and broad-leaved forest). And similar drop trends of soil OM content and total N and hydrolyzed N in soil Profile distribution were also found. The degradations of litter layer and nutrient pool under CF were abruphy as the conventional reforestation was implemented. In addition, an unitary composition of standing forest with less litter and nutrients returned to soil is another factor inducing the degradation of organic nutrient pool. It is suggested that the degradation of soil organic matter and nutrient pool could be control by improving forest regeneration technique and forest component
出处
《土壤学报》
CAS
CSCD
北大核心
2000年第1期41-49,共9页
Acta Pedologica Sinica
基金
国家自然科学基金!39260059
国家自然科学重点基金!49631010
关键词
人工杉木林
土壤
有机物
养分库
退化
Artificial Chinese fir forest
Soil organic matter and nutrient pool, Degradation and control
