摘要
通过对贵州9种主要森林类型植被层养分含量(N、P、K)的调查,分析了养分在乔木层、灌木层和草本层中的分配特征。结果表明:林下植被层养分含量均高于乔木层,总体上草本层养分含量最高,灌木层和乔木层因群落不同而异。混交林养分含量高于纯林,天然林高于人工林,速生树种大于慢生树种。各种森林类型植被层中,N、K元素相对P元素含量较多,N含量是P含量的3.0—24.1倍,K含量是P含量的3.6~16.8倍。乔木层不同器官养分含量总体上表现出叶〉皮〉枝〉根〉木材的趋势;灌木层不同器官养分含量基本表现为叶〉根〉枝干;草本层养分含量均表现为地上〉地下。
Based on the survey on the nutrient contents (N, P, and K) of vegetation in nine major forests of Guizhou, the allocation characteristics of the nutrients in the arbors, shrubs and herbs were analyzed. The results revealed that the nutrient contents in undergrowth vegetations were higher than those in the tree layer, and overall the highest in herb layer. The nutrient contents in shrub layer and tree layer varied among communities. The nutrient contents in mixed forests were higher than those in pure forests, higher in natural forests than in artificial forests, and higher in fast-growing tree species than in slow-growing tree species. In all these forest vegetations, the contents of N and K were more than those of the P with N 3.0-24. 1 times and K 3.6-16.8 times as high as P. The allocation of nutrient contents in the tree layers was shown as leaf 〉 bark 〉 branch 〉 root 〉 timber, in the shrub layers as leaf 〉 root 〉 stem, and in the herb layers as aboveground 〉 underground.
出处
《北京林业大学学报》
CAS
CSCD
北大核心
2015年第4期48-55,共8页
Journal of Beijing Forestry University
基金
贵州森林生态效益监测与评价研究(黔林科合[2010]重大01号)
贵州省林业调查规划院森林生态监测评估院士工作站(黔科合院士站[2013]4004)
贵州省森林资源监测与评价科技创新人才团队(黔科合人才团队[2013]4007)
关键词
森林类型
养分含量
分配特征
forest types
nutrient content
allocation characteristics