[Effects of root system and litter of Chinese fir on soil microbial properties].
A simulation test was conducted to study the effects of the root system and litter of Chinese fir (Cunninghamia lancceolata) on soil microbial properties. After the amendment with C. lancceolata root system, the soil microbial biomass C, basal respiration, total organic C, and microbial quotient increased significantly (P < 0.05), while soil metabolic quotient (qCO2) presented an opposite trend. In the treatment amended with C. lancceolata litter, the soil basal respiration and qCO2 decreased significantly (P < 0.05), whereas soil microbial biomass C, total organic C, and microbial quotient had less change. A significant interaction between C. lancceolata root system and litter was observed on soil basal respiration and qCO2. The qCO2 had significant positive correlations with soil total organic C (R2 = 0.209) and dissolved organic C (R2 = 0.325), suggesting that the C use efficiency of soil microbes decreased with increasing soil organic C content. Comparing with litter, the root system of C. lancceolata played more important roles in soil ecological processes.
Zhang
Wei-Dong
WD
Huitong Experimental Station of Forest Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China. tzhangweidong@hotmail.com
Wang
Si-Long
SL
Yan
Shao-Kui
SK
Yang
Hui-Xia
HX
Xu
Guang-Biao
GB
D002244:Carbon / Q000032:analysis*; D002245:Carbon Dioxide / Q000032:analysis*; D032486:Cunninghamia / Q000254:growth & development / Q000378:metabolism*; D017753:Ecosystem; D018515:Plant Leaves / Q000378:metabolism; D018517:Plant Roots / Q000378:metabolism*; D012987:Soil / Q000032:analysis; D012988:Soil Microbiology
D012987:Soil; D002245:Carbon Dioxide; D002244:Carbon