Characteristics of biomass and productivity in Larix gmelinii natural forests with different stand structures
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摘要: 分析了不同结构落叶松Larix gmelinii天然中龄林的生物量和生产力特征,建立了单株总生物量和干、枝、叶生物量模型。结果表明:①草类 + 落叶松林和杜香Ledum palustre + 落叶松林生产力、总生物量及其枝和叶生物量比例均为前者高。总生物量中树干生物量比例为后者高。密度为1 000 ~ 3 000 株hm-2,草类 + 落叶松林和杜香 + 落叶松林生物量及生产力最高分别达55.82 thm-2,0.99 thm-2a-1和50.36 thm-2,0.83 thm-2a-1。干、枝、叶生物量比例最低分别为79.6%,14.6%,4.8%和83.4%,8.8%,3.6%。②随密度增加,草类 + 落叶松林生产力、总生物量及其枝、叶生物量比例均增加,而干生物量比例减小。③随树种组成中落叶松成数的增加,林分生产力、总生物量及其干生物量比例呈增加趋势,而枝、叶生物量比例减小。表5参19Abstract: This study analyzed characteristics of biomass and productivity in Larix gmelinii natural forests with different stand structures,and established models for the total biomass and the biomass of trunks,branches and leaves. Results show that:i) As to the productivity,total biomass and biomass proportion of branches and leaves,the grasses + larch forest is higher than the Ledum palustre + larch forest,while for the ratio of the biomass of trunks in the total biomass,the latter is higher than the former. With a density of 1 000 - 3 000 plantshm-2,the highest biomass and productivity of grasses-larch forest and Ledum palustre + larch forest are respectively 55.82 thm-2,0.99 thm-2a-1 and 50.36 thm-2,0.83 thm-2a-1. The lowest biomass proportion of trunks,branches and leaves in the grasses + larch forest is respectively 79.6%,14.6%,and 4.8%;and 83.4%,8.8%,and 3.6% in the Ledum palustre + larch forest. ii) Along with the increase of density,the productivity,total biomass of the grasses + larch forest as well as its biomass proportion of branches and leaves increase,whereas the biomass of branches decreases. iii) As the quota of larch forest increases in the species composition,the productivity,total biomass and the biomass proportion of trunks of forest stand are tending to increase,whereas the biomass proportion of branches and leaves decreases.[Ch,5 tab. 19 ref.]
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Key words:
- forest ecology /
- Larix gmelinii /
- biomass /
- biomass model /
- productivity /
- stand structure /
- Daxingan mounfains
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链接本文:
https://zlxb.zafu.edu.cn/article/doi/10.11833/j.issn.2095-0756.2011.01.009
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