2种马尾松林林下植被生物量特性研究  

Biomass characteristics of understory vegetation in pure and mixed pinus massoniana forests

作　　者：秦金舟[1] 何小定[1] 陈晓娟[1] 袁梦[1] 刘桂华[1] 

机构地区：[1]安徽农业大学林学与园林学院,合肥230036

出　　处：《安徽农业大学学报》2013年第5期740-745,共6页Journal of Anhui Agricultural University

基　　金：十二五科技支撑(2011BAD38B0405)资助

摘　　要：对枞阳大山林场马尾松纯林和马尾松阔叶混交林林下植被生物量特性进行了研究。结果表明,马尾松纯林林下灌木占林下植被总量的比例(91.61%)大于马尾松阔叶混交林(74.80%)。2种马尾松林下植被生物量在各器官的分配比例均呈现出:灌木层生物量中根>茎>叶;草本层的地上部分生物量远远小于地下部分生物量。马尾松阔叶混交林相对于马尾松纯林,土壤容重在减小,土壤含水量、>0.25 mm的水稳性团聚体、有机质、全N、水解N、有效P和速效K含量在增加。相关分析表明,林下植被生物量地下部分比例与土壤容重和土壤含水量呈显著负相关,而与土壤有机质、全N和速效P呈显著正相关。In this paper, we studied the blomass characteristics of understory vegetation in pure pinus mas- soniana forest and mixed forest ofpinus massoniana and broad-leaved trees in Dashan Forest Center, Zongyang county. The results were as follows The biomass proportions of shrub layer in pure forest and mixed forest were 91.61% and 74.80%, respectively. The biomass proportions of the allocation to different parts of shrub layer in two different pinus massoniana stands were roots 〉 stems 〉leaves. The aboveground biomass of the herbaceous layer in different stands was much less than that from the underground part. Compared with pure pinus masson- iana forest, the soil bulk density in mixed forest was lower, but the s0il water content, 〉0.25 mm water-stable aggregate content, organic matter, total N, hydrolysable N, available P and available k in mixed forest were higher than those in pure pinus massoniana forest. The correlation analysis showed that there were significantly negative relationships between the underground biomass and the soil bulk density and the soil water content, but the relationships between the underground biomass and the organic matter, total N and available P were significantly positive.

关 键 词：马尾松单纯林 马尾松阔叶混交林 林下植被 生物量分配 土壤理化性质 

分 类 号：S791.248[农业科学—林木遗传育种]