生态学杂志2025，Vol.44Issue(2)：373-382,10.DOI:10.13292/j.1000-4890.202502.039
区域互置模拟对亚热带3种典型树种凋落叶分解初期主场效应的影响
Influences of cross-regional reciprocal translocation simulation on home-field effects of three typical sub-tropical tree species during early leaf litter decomposition
摘要
Abstract
To investigate the home-field effects of litter decomposition and the underlying mechanisms at the region-al scale,we examined mass loss rate and nitrogen release rate of leaf litter from three dominant tree species of sub-tropical China(Pinus massoniana,Cunninghamia lanceolata,and Quercus variabilis)under interplanting condi-tions of different soils at specific temperatures.We collected soil and leaf litter samples in sites of the southern and northern subtropics and carried out a 126-day indoor decomposition experiment under different temperatures.The results showed that:(1)species identity and decomposition time significantly affected the mass loss rate and nitro-gen release rate of leaf litter,with Q.variabilis showing the greatest mass loss rate and nitrogen release rate during the 126 days(32.43％and 33.51％),with C.lanceolata having a relatively low mass loss rate(15.35％);(2)Under the same-regional interplanting conditions,Q.variabilis showed home-field disadvantage of nitrogen release only on north subtropical soils(-28.35％),P.massoniana showed both home-field disadvantage of mass loss and nitrogen release on south subtropical soils(-3.20％and-17.65％),and C.lanceolata showed home-field advan-tage of mass loss on south subtropical soils(2.13％).Under the cross-regional interplanting conditions,Q.variabi-lis showed home-field disadvantage of mass loss and nitrogen release regardless of the northern and southern sub-tropics(-57.55％to-3.70％),while P.massoniana and C.lanceolata showed home-field disadvantage of mass loss or nitrogen release in the northern subtropics(-31.76％to-4.40％),and home-field advantage in the south-em subtropics(3.78％to 58.43％);(3)The range of home-field advantage(additional decomposition at home,ADH)in leaf litter mass loss and nitrogen release and the frequency of their home-field effect increased under cross-regional interplanting conditions compared to the same-regional interplanting.Staged mass loss was positively correlated with microbial biomass nitrogen,whereas ADH of nitrogen release was negatively correlated with microbi-al biomass under same-regional interplanting conditions,and ADH of nitrogen release was positively correlated with temperature under cross-regional interplanting conditions.These results suggest that the home-field effects of leaf lit-ter decomposition of the three tree species in the subtropics were affected by a combination of temperature,leaf lit-ter species,decomposition time,and soil microorganisms.In contrast,temperature,in addition to substrate quali-ty,can significantly constrain the home-field effects of leaf litter decomposition under cross-regional interplanting conditions.关键词
凋落叶分解/土壤微生物生物量/质量损失率/氮释放率/主场效应Key words
leaf litter decomposition/soil microbial biomass/mass loss/nutrient release/home-field effect引用本文复制引用
俞珺慈,周长剑,戴渺鸿,晏召贵,滕明君,王鹏程,何伟,曾立雄..区域互置模拟对亚热带3种典型树种凋落叶分解初期主场效应的影响[J].生态学杂志,2025,44(2):373-382,10.基金项目
国家自然科学基金项目(32071560,32271851)资助. （32071560,32271851）
