|Table of Contents|

Soil microbial community structure characteristics of Chenshan Red-heart Chinese fir of different stand ages*(PDF)

Chinese Journal of Applied & Environmental Biology[ISSN:1006-687X/CN:51-1482/Q]

2016 03
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Soil microbial community structure characteristics of Chenshan Red-heart Chinese fir of different stand ages*
LIU Shun12 WU Zhenhua1 GUO Xiaomin1 SHENG Keyin1 ZHU Xinchuan3 WEN Weihua1 & ZHANG Wenyuan1**
1Key Laboratory of Tree Breeding and Cultivation of Jiangxi Province, Jiangxi Agricultural University, Nanchang 330045, China2State Forestry Administration Key Laboratory on Forest Ecology and Environmental Sciences/Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing 100091, China3Chenshan Forestry Station of Anfu County, Jiangxi Province, Ji’an 343200, China
Soil microbial community plays an important role in the terrestrial ecosystem by carrying out almost all soil biochemical processes. This research aimed to study the forest soil microbial community through the Chenshan Red-heart Chinese fir of different

Soil microbial community plays an important role in the terrestrial ecosystem by carrying out almost all soil biochemical processes. This research aimed to study the forest soil microbial community through the Chenshan Red-heart Chinese fir of different ages (5a, 10a, 20a and 40a) by using phosphilipid fatty acid (PLFA) method which has been widely used to detect soil microbial community with the advantage of simple operation, low experiment conditions and good testing stability. The results showed that with the increase of age, the content of total PLFAs and PLFAs of each kind of microbe first decreased and then increased; the PLFAs content of fungi had no obvious change; the ratio of G+/G- and SAT/MONO decreased; that of Cy/Pre and soil microbial community diversity indexes first increased and then decreased. The changes of soil microbial community with the stand age were mainly caused by the differences in soil physical and chemical properties among different ages, with contributory ratio of PC1 and PC2 as 72.2% and 25.0% respectively. Available nutrients had larger effect than total nutrients, which reflected the impact of soil nutrient availability on microbial community. Cy/Pre was less than 0.5 except in 10a soil, indicating the existence of environment stresses (e.g. nutrient and oxygen) which may cause the decrease in microbial PLFAs from 10a to 20a. Such environment stresses did not change the stability of soil ecosystem. Therefore we should pay more attention to the soil environment condition in forests older than 10a, to prevent the adverse impacts on ecosystem.


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Last Update: 2016-06-25