摘要
1990年在马尾松林采伐迹地上开展马尾松马占相思混交林 (1∶1和 1∶2 )和马尾松纯林对比试验 ,研究结果表明 :马尾松马占相思 1∶1和 1∶2混交林生长快于马尾松纯林 ,经方差分析 ,混交林与纯林之间马尾松树高、胸径、单株材积差异达显著水平。马尾松马占相思 1∶1混交林单位面积生物量高于 1∶2混交林 ,1∶2混交林生物量又高于马尾松纯林 ,林木各器官生物量大小顺序表现出干 >枝 >叶 >根 >根桩 ,而枝叶生物量总和大于主干生物量 ;马尾松马占相思混交林土壤容重低于马尾松纯林林地土壤 ,而持水量、孔隙度、通气度均高于纯林林地土壤 ;混交林林地土壤有机质、全氮、水解氮、速效磷、速效钾含量均高于纯林土壤。
Comparative experiment of pure stand of Pinus massoniana and mixed stand of Pinus massoniana and Acacia Mangium was carried out in 1990.The results showed that the growth of mixed stand of Pinus massoniana and Acacia Mangium (1:1 and 1:2)was faster than that of pure stand of Pinus massoniana.The difference of average height,diameter and individual volume on Pinus massoniana between mixed forest and pure stand was obvious;The biomass of 1:1 mixed forest was higher than that of 1:2 mixed forest as well as 1:2 mixed forest was higher than that of pure stand of Pinus massoniana,the biomass of every organ showed:stem>branches>leaves>roots>stump,while the total biomass of branches and leaves was more than that of trunks:The soil unit weight of mixed forest was lower than that of pure stand of Pinus massoniana while water holding amount,pore degree,aerating degree of mixed forest were higher than those of pure stand.The soil organic matter,total nitrogen,total phosphorous,available nitrogen,available phosphorous and available potasium of mixed forest were higher than those of pure stand of Pinus massoniana.
出处
《防护林科技》
2004年第4期8-10,共3页
Protection Forest Science and Technology
