Show simple item record

dc.contributor.author杨玉盛
dc.contributor.author陈光水
dc.contributor.author何宗明
dc.contributor.author陈银秀
dc.contributor.author谢锦升
dc.date.accessioned2017-11-14T02:46:51Z
dc.date.available2017-11-14T02:46:51Z
dc.date.issued2001-12-30
dc.identifier.citation林业科学,2001,(S1):35-41
dc.identifier.issn1001-7488
dc.identifier.otherLYKE2001S1006
dc.identifier.urihttps://dspace.xmu.edu.cn/handle/2288/154297
dc.description.abstract本文系统地研究了 2 7a生杉木观光木混交林和杉木纯林群落细根 (<2mm)的生物量、净生产力和年周转率。结果表明 ,混交林和纯林群落活细根现存量分别为 3 872和 3 315t·hm- 2 ,活细根现存量变化呈双峰型 ,在 3月和 9月出现两次高峰 ;死细根现存量为 1 5 0 9和 1 2 6 9t·hm- 2 ,数量变化呈现单谷型 ,在 5月或 3月出现最低值 ;细根净生产力分别为 4 12 4和 3 5 2 8t·hm- 2 a- 1 ,分别占各自群落净第一性生产力的 2 2 9%和2 0 9% ;细根年死亡量分别为 2 119和 1 894t·hm- 2 ,相当于各自群落地上部分凋落物量的 31 4%和 2 7 8% ;细根周转率分别为 1 0 7和 1 0 6 ,观光木、混交林杉木、纯林杉木的细根周转速率依次降低 ,而林下植被层细根周转率高于乔木层。表明细根周转是群落有机质归还的重要途径 ,对维持和改良地力有重要作用
dc.description.abstractStudies on biomass, net productivity and annual turnover rate of fine roots in mixed forest of Cunninghamia lanceolata and Tsoongiodendron odorum and in pure stand of Cunninghamia lanceolata at 27 years old were carried out. The existing amount of living fine roots in both stands were up to 3 872 and 3 315?t·hm -2 , and their seasonal changes showed two peaks in March and September, and those of dead fine roots amounted to 1 509 and 1 269?t·hm -2 , being lowest in May or March. The net productivity of fine roots in both stands totaled to 4 124 and 3 528?t·hm -2 a -1 , accounted for 22 9% and 20 9% of total net primary productivity of community, respectively. In both stands, annual mortality of fine roots were 2 119 and 1 894?t·hm -2 , respectively, amounted 31 4% and 27 8% of annual aboveground litterfall. Annual turnover rate of fine roots was 1 07 in mixed stand and 1 06 in pure stand, which decreased successively from Tsoongiodendron odorum, Cunninghamia lanceolata in mixed forest to the pure stand, and that of undergrowth were higher than that of tree stralum in both stands. It was concluded that annual turnover of fine roots was an important way for organic matter in communities returning to forest floor.
dc.description.sponsorship中国博士后科研基金;; 福建省科委重大基础研究项目 ( 2 0 0 0 -F -0 0 4);; 高等学校骨干教师资助计划资助
dc.language.isozh_CN
dc.subject细根
dc.subject生物量
dc.subject净生产力
dc.subject周转率
dc.subject杉木
dc.subject观光木
dc.subjectFine roots, Biomass, Net productivity, Turnover rate, Tsoongiodendron odorum, Cunninghamia lanceolata
dc.title杉木观光木混交林群落细根净生产力及周转
dc.title.alternativeNET PRODUCTIVITY AND TURNOVER RATE OF FINE ROOTS IN MIXED FOREST OF CUNNINGHAMIA LANCEOLATA AND TSOONGIODENDRON ODORUM
dc.typeArticle


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record