杉木人工林不同发育阶段林下植被、土壤微生物、酶活性及养分的变化  

The Change of Undergrowth,Soil Microorganism, Enzyme Activity and Nutrient in Different Developing Stage of the Chinese Fir Plantation

作　　者：焦如珍[1,1] 杨承栋[1] 屠星南[1] 盛炜彤[1] 焦如珍 

机构地区：[1]中国林业科学研究院林业研究所

出　　处：《林业科学研究》1997年第4期373-379,共7页Forest Research

基　　金：国家自然科学基金

摘　　要：土壤微生物总数及细菌、真菌数量、土壤酶活性（特别是蛋白酶、磷酸酶和蔗糖酶）及土壤养分状况（主要是有机质含量）从杉木幼龄林到中龄林随着林冠的郁闭，林下植被盖度急剧下降，呈明显下降趋势；土壤微生物总数，细菌总数，蛋白酶，磷酸酶，蔗糖酶以及土壤有机质从中龄林到成熟林随着林木密度及郁闭度下降，林下植被盖度逐步得到恢复，也呈明显的上升趋势。由于过氧化氢酶和多酚氧化酶活性的降低，有可能导致中龄林土壤中多酚类有毒物质的积累，这或许是杉木连栽产量下降或成活率低的原因之一。With the reduction of undergrowth coverage in Chinese fir plantation from juvenile to mideum plantation,the amount of soil microorganism,bacteria,fungi,actinomycetes and the soil enzyme activity especially the proteinase,phosphorylase,sucrase and the organic nutrient content cut down rapidly.With the increase of undergrowth coverage in Chinese fir plantation from mideum to mature plantation,the amount of soil microorganism,bacteria and the soil enzyme activity especially the proteinase,phosphorylase,sucrase and the organic nutrient content went up gradually.Due to the reduction of phosphorylase and hydrogen peroxidase causing the accumulation of poison as phenolic compounds in the soil of medium plantation.Maybe this is one of the causes for the yield reduction or low survival rate in successive rotation of Chinese fir.

关 键 词：杉木 发育阶段 土壤微生物 土壤养分 

分 类 号：S791.270.1[农业科学—林木遗传育种]