2024年4月24日 星期三
安塞人工沙棘林地上部生物量和净初级生产量
Biomass and net primary productivity of above-ground parts of artificial Hippophae rhamnoides L. stand in Ansai
2001年 第10卷 第2期 页码[38-41]    下载全文[0.7MB]  
摘要

采用收获法测定安塞沙棘人工林不同林龄林分的地上部生物量, 分析沙棘人工林发育过程中地上部生物量和净初级生产量的变化趋势, 建立沙棘单株地上部各器官分量的回归模型结果表明:沙棘人工林 45 a 即可郁, 郁闭度为 0.80.9 1 8 龄内, 地上部生物量随林龄增加而增加, 811 龄增加缓慢, 11 13 龄趋于稳定, 13 的沙棘人工林地上部生物量为 1 151 g m2 , 地上部生物量的器官分配为:主茎 410 g m2(35.6%), 478 g m2(41 .5%), 215 g m2(18.8%), 20 g m2(0.02 %), 枯枝28 g m2(0.02 %)。 8 龄沙棘人工林的净初级生产量600 g (m2·a), 此林龄后需采取林中间种油松(Pinus tabulaeformis Carr.)、杨树(Populus sp .)等树种及牧草或平茬复壮等措施对林分进行改造
 

Abstract

The harvest method was used to study the biomass of above-ground parts of artificial Hippophae rhamnoides L. stand of different ages. The dynamics on the biomass and net primary productivity of aboveground parts in the course of development were analyzed in detail. The optimum regression models of biomass of different organs of above-ground part of Hippophae rhamnoides L. were built. The results show that artificial Hippophae rhamnoides stand crowned closer after 4~5 years, crown density 0. 8 ~0. 9. Biomass of aboveground parts in 1~8 year-stand increased with age of stands, 8~11 year-stand slowly increased, 11~13 year-stand trended to stable. Biomass of above-ground parts of 13 year-stand was 1 151 g /m2 , and its allocation was: main stem 410 g/ m2 ( accounted for 35. 6%) , branch 478 g m2 ( accounted for 41. 5%) , leaf material 215 g m2 ( accounted for 18. 8%) , fruit 20 g /m2 ( accounted for 0. 02%)and dry-branch 28 g /m2 ( accounted for 0. 02%). Net primary productivity of 8 year-stand was 600 g ( m2·a) , after this age of stands the measures of inter-planting tree species, herb species or flat cutting may be used to reform. the stand.

关键词沙棘; 人工林; 地上部; 生物量; 净初级生产量
Key wordsHippophae rhamnoides L .; artificial stand; above-ground parts; biomass; net primary productivity
作者阮成江1 , 李代琼2
所在单位1.盐城工学院, 江苏 盐城 224003;
2.中国科学院·水利部水土保持研究所, 陕西 杨陵 712100
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基金项目国家科技部中俄国际合作资助项目;水利部“948”引进资助项目(975154)