
Dynamic changes of soil microbial biomass and microbial entropy after planting Dictyophora indusiata in Phyllostachys edulis forests
XIA Jie, CHEN Sheng, WU Yifan, ZHANG Wei, XIE Jinzhong
JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2022, Vol. 46 ›› Issue (4) : 127-134.
Dynamic changes of soil microbial biomass and microbial entropy after planting Dictyophora indusiata in Phyllostachys edulis forests
【Objective】 Dictyophora indusiata planted in a Phyllostachys edulis forest could influence the microbial activity of soil. The study aimed to reveal the changes in soil quality and provide a reference for the management of bamboo-fungus composite ecosystems by analyzing the effects of D. indusiata on the biomass, entropy and stoichiometry imbalance of soil microbia in a P. edulis forest. 【Method】 Using the soils of non-planted D. indusiata (CK) and those after 0 (T0), 1 (T1) and 2 (T2) years of D. indusiata harvest, the relationships among soil microbial biomass, microbial entropy, and soil-microbial stoichiometry imbalance were investigated in different treatments. 【Result】 The results indicated that the soil organic carbon (SOC), total nitrogen (TN), soil microbial biomass carbon and nitrogen (MBC, MBN), and soil microbial entropy carbon, nitrogen, phosphorus (qMBC, qMBN, qMBP) in T0, T1, T2 soils were significantly higher than those in the control, whereas the soil total phosphorus (TP) content was significantly lower than that in the control. Soil MBC and qMBC gradually decreased with the increasing harvest time. Soil MBN and qMBN initially decreased and then increased slightly, whereas soil SOC content initially decreased and then increased significantly; Soil TN, TP, MBP and qMBP increased initially and then decreased. The TN, TP, MBP and qMBP in T1 soil were significantly higher than those in T0 and T2 soils. The soil-microbial stoichiometry (Cimb/Nimb, Cimb/Pimb, Nimb/Pimb) of T0 had the lowest imbalance compared with the other periods. Soil MBC was positively correlated with MBN and both were negatively correlated with Cimb/Nimb and Cimb/Pimb. Soil MBP was positively correlated with Cimb/Pimb and Nimb/Pimb. 【Conclusion】 The soil quality of P. edulis forests was improved significantly in the short term after planting D. indusiata. However, the soil quality of P. edulis forests tends to deteriorate with the increasing annual gap after the harvest of D. indusiata, and the soil quality is worse than that of P. edulis forest without planting D. indusiata; The best soil quality in the P. edulis forest was observed just after the harvest of D. indusiata.
Phyllostachys edulis forest / Dictyophora indusiata / soil microbial biomass(SMB) / soil microbial entropy / soil-microbia stoichiometry imbalance
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