文献类型：期刊文献

英文题名：Introducing N₂-fixing tree species into Eucalyptus plantations increases organic phosphorus transformation but decreases its accumulation within aggregates in subtropical China

作者：Xu, Haocheng[1,2] You, Yeming[1,3] Wang, Yi[4] Gao, Guannv[1] Ming, Angang[3,5] Huang, Xueman[1,3]

第一作者：Xu, Haocheng

通信作者：Huang, XM[1];Huang, XM[2]

机构：[1]Guangxi Univ, Guangxi Coll & Univ Key Lab Cultivat & Utilizat Su, Coll Forestry, Guangxi Key Lab Forest Ecol & Conservat, Nanning 530004, Peoples R China;[2]Sun Yat Sen Univ, Sch Agr, Shenzhen Campus, Shenzhen 518107, Guangdong, Peoples R China;[3]Guangxi Youyiguang Forest Ecosyst Res Stn, Pingxiang 532600, Guangxi, Peoples R China;[4]Int Ctr Bamboo & Rattan, Beijing Bamboo & Rattan Sci & Technol, Inst Resources & Environm, Key Lab Natl Forestry & Grassland Adm, Beijing 100102, Peoples R China;[5]Chinese Acad Forestry, Expt Ctr Trop Forestry, Pingxiang 532600, Guangxi, Peoples R China

年份：2024

外文期刊名：PLANT AND SOIL

收录：;Scopus(收录号：2-s2.0-85190098883);WOS:【SCI-EXPANDED(收录号:WOS:001200721800003)】；

基金：This study was jointly supported by grants from the National Natural Science Foundation of China (Nos. 31960240 and 32171755), 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：Eucalyptus plantation; N-2-fixing tree species; Soil aggregates; Organic phosphorus fraction; Soil microbial community; Soil enzyme activity

摘要：Background and aimsSoil organic phosphorus (Po) fractions were deemed as potentially significant reservoirs of plant-available phosphorus, profoundly influenced by the physiochemical and biological characteristics of soil. Here we clarify how soil Po fractions and transformation in topsoil aggregates after introducing N2-fixing tree species into Eucalyptus plantation. MethodsWe measured different Po fractions and used phospholipid fatty acids (PLFAs) and four extracellular enzymes activities as bioindicators of soil microbiota and function, respectively. The research was carried out within a 15-years of monoculture Eucalyptus urophylla plantation (PP) and mixed plantation (MP) of Eucalyptus urophylla x Acacia mangium. ResultsThe mean weight diameter (MWD) and geometric mean diameter (GMD were significantly greater in MP than PP. Soil organic carbon (SOC), total nitrogen (TN), NO3--N, C:P and N:P ratios were notably increased but Po content decreased significantly in bulk soil and all aggregates except Po in the <0.25 mm aggregate in MP than PP. Furthermore, the PLFA contents of total microbes, bacteria, and fungi were more abundant in bulk and aggregate soils in MP than PP. Enzyme activities related to N and P cycles showed significant improvement in bulk and most aggregates in MP than PP. ConclusionsOur findings extend the evidence that promoting soil Po transformation may be related to the increasing of N availability, SOC, pH, fungi, and AMF colonization. Taken together, our results highlighted the soil Po fractions response to long term N2-fixing tree species application might be a suitable strategy through efficient management of Po in subtropical Eucalyptus plantations.