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冀北山地不同年龄华北落叶松人工林的生物量

标题: 冀北山地不同年龄华北落叶松人工林的生物量
英文标题: Studies on biomass of different age Larix principis-rupprechtii plantations
作者: 李校,于志勇,许中旗,郝俊霞,刘乐乐
英文作者: LI Xiao,YU Zhiyong,XU Zhongqi,HAO Junxia,LIU Lele
出版时间: 2013-01-01
机构: 河北农业大学
关键词: 华北落叶松,人工林,生物量
英文关键词: Larix principis-rupprechtii,plantations,biomass
刊名: 河北林果研究
英文刊名: Hebei Journal of Forestry and Orchard Research
ISSN: 1007-4961
卷号: 003
基金: ^A河北省科技计划项目^B(10236728);国家"十二五"科技支撑计划"华北中山区高效水土保持林构建技术研究与示范(2011BAD38B0605)^D1
页码: 226-228,232
分类号: S791.22
摘要: 为了了解不同年龄华北落叶松人工林生物量的变化及分配规律,采用相对生长法(乔木)和样方收获法(灌木、草本、凋落物)对4个年龄的华北落叶松人工林生物量进行测定。结果表明,华北落叶松人工林总生物量随林龄的增加而增加,9、18、33、43年生华北落叶松人工林总生物量分别为43.67、67.7、110.38和281.66 t/hm2,总生物量绝大多数集中于乔木层;华北落叶松人工林乔木层各器官生物量分配为,干量占25.85%~62.36%,根量占7.96%~13.38%,枝量占9.86%~11.30%,叶量占1.40%~5.54%,另外,干生物量总体上为随着树龄的增加而增大,而枝、叶的生物量则随着树龄的增加而减少;林下植被层生物量所占比例随着林分年龄的增大而减小;凋落物层生物量所占比例,除33年生外,均达到了20%以上。
英文摘要: In order to understand the biomass and its allocation of Larix principis-rupprechtii planta-tions ,the biomass of the four age Larix principis-rupprechtii plantations was studied based on the re-gression analysis ( for trees) and clear cutting ( for shrubs ,herbs and litter ) .Results showed that the biomass of Larix principis-rupprechtii plantations increased with the increase of plantation age ,and the biomass of 9 ,18 ,33 and 43 year old plantations were 43 .67 ,67 .7 ,110 .38 and 281 .66 t/hm2 ,re-spectively with the most biomass of the plantations concentrated on the tree layer .The biomass of the tree layer allocated in the organs was 25 .85% ~62 .36% ,7 .96% ~13 .38% ,9 .86% ~11 .30% and 1 .40% ~5 .54% of the total biomass in stems ,roots ,branches and leaves ,respectively .Additionally , the biomass of stems increased with the increase of plantation age ,while the biomass of branches and leaves decreased with the increase of plantation age ;The biomass of understory vegetation decreased with the increase of plantation age ;The proportion of litter layer biomass was above 20% ,except for the plantation of 33 years .