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长白落叶松人工林细根生物量及其动态研究(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2014年02期
Page:
175-180
Column:
研究简报
publishdate:
2014-03-24

Article Info:/Info

Title:
Fine roots biomass and its dynamics of Larix olgensis plantation
Article ID:
1000-2006(2014)02-0175-05
Author(s):
ZHENG Jinping FAN Chunnan GUO Zhongling*YANG Baoguo YUE Long LIU Shiling
College of Forestry, Beihua University, Jilin 132013, China
Keywords:
Larix olgensis plantation fine roots biomass fine roots decomposition fine roots turnover
Classification number :
S718
DOI:
10.3969/j.issn.1000-2006.2014.02.034
Document Code:
A
Abstract:
This article had studied the biomass, seasonal dynamics, the vertical distribution, decomposition and turnover of the fine roots in Larix olgensis plantation of Changbai mountain from May 2006 to 2007 by using the sequential soil coring method and litter bag technique. The results showed that the average biomass of fine roots was 3.825 7 t/hm2 with 84.51% living fine roots and 15.49% dead fine roots. The fine roots mainly distributed in the 0-10 cm of soil layer with 72.09% living fine roots and 50.46% dead fine roots. And with soil layer deepen,the fine roots biomass decreased. The annual change of living and dead fine roots biomass in Larix olgensis plantation had obviously seasonal variation. The living fine roots biomass in different season varied with a double peak curve, and the peaks of the curve appear in May and August. The seasonal change of the dead fine roots biomass showed a multiple peak curve. The average decomposition efficiency(k)was 0.001 5 for Larix olgensis plantation. Net primary productivity, decomposition and annual turnover of fine roots in Larix olgensis plantation were 1.534 8 t/hm2, 0.145 0 t/hm2 and 0.47 times per year, respectively.

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Last Update: 2014-03-10