文献类型：期刊文献

英文题名：Conversion of pure Chinese fir plantation to multi-layered mixed plantation increases organic phosphorus accumulation and transformation within soil aggregates

作者：Huang, Haimei[1,2] Huang, Xueman[1,2,3] Wang, Yi[4] Li, Jiajun[1,2] Xiang, Mingzhu[1,2] Li, Changhang[1,2] Liao, Shushou[5] You, Yeming[1,2,3]

第一作者：Huang, Haimei

通信作者：You, YM[1]

机构：[1]Guangxi Univ, Guangxi Coll, Coll Forestry, Guangxi Key Lab Forest Ecol & Conservat, Nanning 530004, Guangxi, Peoples R China;[2]Univ Key Lab Cultivat & Utilizat Subtrop Forest Pl, Guangxi Univ, Coll Forestry, Nanning 530004, Guangxi, Peoples R China;[3]Guangxi Youyiguan Forest Ecosyst Natl observat & R, Youyiguan Forest Ecosyst Observat & Res Stn Guangx, Pingxiang 532600, Guangxi, Peoples R China;[4]Beijing Bamboo & Rattan Sci & Technol, Inst Resources & Environm, Int Ctr Bamboo & Rattan, Key Lab Natl Forestry & Grassland Adm, Beijing 100102, Peoples R China;[5]Chinese Acad Forestry, Expt Ctr Trop Forestry, Pingxiang 532600, Peoples R China

年份：2024

卷号：201

外文期刊名：APPLIED SOIL ECOLOGY

收录：;EI(收录号：20240035538);Scopus(收录号：2-s2.0-85198200788);WOS:【SCI-EXPANDED(收录号:WOS:001348240600001)】；

基金：Financial support for this study was provided by grants from the National Natural Science Foundation of China (Nos. 32171755 and 31960240) , and the scientific research capacity building project for Youyiguan Forest Ecosystem Observation and Research Station of Guangxi under Grant No. 2203513003.

语种：英文

外文关键词：Chinese fir plantation; Multi-layered mixed plantation; Organic phosphorus fractions; Soil aggregates; Soil microbial community

摘要：Evaluation of the impacts of environmental factors and microbial communities on soil organic phosphorus (Po) availability is needed to clarify P cycling and regulate plantations productivity. However, the effects on Po accumulation and transformation of converting pure Chinese fir plantation to multi-layered mixed plantation and their regulatory mechanisms remain unclear. The aim of this study was to examine the impacts of the transformation of pure stand of Chinese fir (Cunninghamia lanceolata; PP) to mixed plantation with multiple tree species (C. lanceolata, Castanopsis hystrix, and Michelia hedyosperma; MP) on Po accumulation and transformation within topsoil (0-10 cm) aggregates in subtropical China. Our results showed that the soil organic carbon (SOC), total nitrogen (TN), ammonium nitrogen (NH4+-N), and available phosphorus (AP), as well as the carbon-nitrogen ratio of soil (C/Nsoil) and carbon-phosphorus ratio of soil (C/Psoil) were significantly higher (P < 0.05) of all aggregates in MP than those in PP. The quantities of soil microbial biomass C, N, P (MBC, MBN, and MBP) in all different aggregates were significantly greater (P < 0.05) in MP than in PP. The phospholipid fatty acid contents related to bacteria, fungi, arbuscular mycorrhizal fungi (AMF), and actinomycetes were significantly greater in all aggregate classes (P <0.05) in MP relative to PP. The activities of all tested C, N, and P hydrolytic enzymes, as well as labile organic P, moderately labile organic P, moderately resistant organic P, and highly resistant organic P contents, were significantly higher of most aggregate size classes in MP. Finally, redundancy analysis (RDA) suggested that Po fractions were primarily affected by the NH4+-N, litterfall biomass (LF), carbon-nitrogen ratio of litter (C/Nlitter), SOC and fine root biomass (FR). Our findings suggest that converting pure Chinese fir plantations into multi-layered mixed plantations may represent an effective management strategy for promoting organic P accumulation and transformation by regulating soil and microbial properties in degraded soils of Chinese fir plantations.