WEI Sheng-zhao
College of Forestry, Sichuan Agricultural University, Chengdu 611130, ChinaLI Lin
College of Forestry, Sichuan Agricultural University, Chengdu 611130, China;Sichuan Forestry Investigation and Design Institute, Chengdu 610084, ChinaCAO Qin
College of Forestry, Sichuan Agricultural University, Chengdu 611130, ChinaTIE Lie-hua
College of Forestry, Sichuan Agricultural University, Chengdu 611130, ChinaHU Ju-xi
College of Forestry, Sichuan Agricultural University, Chengdu 611130, ChinaLUO Xiao
College of Forestry, Sichuan Agricultural University, Chengdu 611130, China;Sichuan Forestry Investigation and Design Institute, Chengdu 610084, ChinaTAN Jing-xin
College of Forestry, Sichuan Agricultural University, Chengdu 611130, China;Sichuan Forestry Investigation and Design Institute, Chengdu 610084, ChinaHUANG Cong-de
College of Forestry, Sichuan Agricultural University, Chengdu 611130, ChinaIn order to understand the effect of continuous planting of Eucalyptus grandis on biomass and number of soil microbes, the relationships between soil microbial biomass, number of major microbial groups with soil physicochemical properties in Pinus massoniana forest and E. grandis plantations at different rotations were studied by using space-time interchange method. The results showed that the soil microbial biomass carbon, biomass nitrogen and number of bacteria and fungi in the first rotation plantations of E. grandis had not significant difference from those in P. massoniana forest, but the number of actinomycetes significantly increased. However, with the increasing rotation of Eucalyptus grandis continuous plantations, the soil microbial biomass carbon, biomass nitrogen and the number of bacteria, actinomycetes and fungi decreased. Stepwise regression analysis showed that soil total phosphorus could independently explain 71.7%, 86.1% and 63.0% variation of the microbial biomass nitrogen, the number of bacteria and fungi, respectively. Soil total phosphorus together with total porosity could explain 87.9% variation of microbial biomass carbon, and 89.6% variation of the number of actinomycetes together with total nitrogen. So, it could be concluded that soil total phosphorus well explained the variation of soil microbial characteristics in E. grandis plantations.
魏圣钊,李林,曹芹,铁烈华,胡峻嶍,骆晓,谭靖星,黄从德.巨桉连栽对土壤微生物生物量和数量的影响[J].热带亚热带植物学报,2020,28(1):35~43
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