摘要
本文通过对南平溪后安曹下杉木丰产林（７０年）和山脊上保留的杂木林土壤腐殖质组成（ＨＡ和ＦＡ）、胡敏酸光密度值、腐殖质不同结合形态比较分析结果表明：杉木林取代杂木林后土壤有机质和腐殖酸类含量下降，ＨＡ／ＦＡ和Ｅ４值降低，Ｅ４／Ｅ６值增大，土壤中松结合态（Ⅰ）和紧结合态（Ⅲ）腐殖质减少，土壤腐殖质质量下降趋势较为明显．这可能亦是杉木林连栽土壤肥力退化的主要原因之一．
The contrasting studies on humic composition (HA and FA),light density of humic acid,combined forms of humus in the soils under fast-growing Chinese fir plantation(70-year-old) and broad-leaved forest (remained at hill ridge) were carried out at Qihou, Fujian. The resulting effects following replacement of broad-leaved forest by Chinese fir plantation included decreased soil organic matter and humus,elevated E4/E6ratio, descended HA/FA ratio, E4 value, and both loosely and tightly combined humus contents. This may be one of the main reasons for soil degradation at the sites with continuous Chinese fir planting.
出处
《福建林学院学报》
CSCD
1996年第2期97-100,共4页
Journal of Fujian College of Forestry
基金
福建省自然科学基金
关键词
土壤腐殖质
杉木
杂木林
soil humus
HA/FA ratio
proportion of loosely to tightly combined humus
E4 value
fast growing Chinese fir plantation, broadleaved forest
