长期氮磷添加对热带季风次生林地上凋落物产量与分解速率的影响
Impacts of Long-term Nitrogen and/or Phosphorus Additions on Litterfall Production and Decomposition Rates in a Tropical Monsoon Secondary Forest
摘要
Abstract
Monsoon secondary forests are important ecosystems in tropical South China,but reports on their long-term response to nitrogen(N)and phosphorus(P)addition in terms of litter production and decomposition rates are scarce.This paper prbesents the results of a 12-year study on aboveground litter production and a 4-year study on decomposition rates in a long-term NP addition experiment in a tropical monsoon secondary forest in South China.The experiment employed a two-factor(N addition and P addition)and two-level(addition and no addition)design,including control,N-only addition,P-only addition,and combined NP addition treatments.The results showed that over 12 years,the total aboveground litter production for the four treatments was(11544±1115),(12649±1087),(13694±1456),and(11761±712)g/m2,respectively.P addition significantly increased litter production,while N addition showed a trend of increasing litter production.There was a significant interaction between N and P addition,and the effects of NP addition did not vary with year or season.During the 4-year decomposition rate study,the decomposition rate constants for the four treatments were(1.44±0.07),(1.76±0.09),(2.10±0.10),and(1.81±0.08),respectively.P addition significantly affected litter decomposition rates,while N addition had no significant effect,and there was no significant interaction between N and P addition.Long-term P addition significantly increased aboveground litter production in this ecosystem,while long-term N addition had a weak effect.There was a significant interaction between N and P addition,and the effects of NP addition did not change with treatment duration or dry/wet seasons.Aboveground litter decomposition was mainly limited by P,with no response to increased N availability.Therefore,it was suggested that the effects of long-term NP addition on aboveground litter production and decomposition in tropical monsoon secondary forests,contributing to the understanding of long-term response mechanisms of this ecosystem to increased nutrient availability.关键词
氮沉降/磷限制/凋落物分解/碳循环/土壤Key words
Nitrogen deposition/Phosphorus limitation/Litter decomposition/Carbon cycle/Soil引用本文复制引用
李应文,陈碧云,余世钦,李泳兴,邹碧,庄萍,李志安,李慧,王法明..长期氮磷添加对热带季风次生林地上凋落物产量与分解速率的影响[J].热带亚热带植物学报,2026,34(1):11-20,10.基金项目
国家自然科学基金项目(U2106209,32171594,32301398,42007230,42201057) （U2106209,32171594,32301398,42007230,42201057）
国家重点研发计划项目(2023YFE0113100,2023YFF1304500,2021YFC3100400) （2023YFE0113100,2023YFF1304500,2021YFC3100400）
广东省重点领域研究计划项目(2022B1111230001) （2022B1111230001）
中国科学院青年团队项目(YSBR-037) （YSBR-037）
广东省基础和应用基础研究项目(2021B1515020011) （2021B1515020011）
中国科学院青促会项目(2021347) （2021347）
"一带一路"国家和国际科学组织联盟项目(ANSO-CR-KP-2022-11) （ANSO-CR-KP-2022-11）
广东省应用植物学重点实验室项目(2023B1212060046) （2023B1212060046）
中国科学院华南植物园项目(QNXM-01)资助 This work was supported by the National Natural Science Foundation of China(Grant No.U2106209,32171594,32301398,42007230,42201057),the National Key Research and Development Program of China(Grant No.2023YFE0113100,2023YFF1304500,2021YFC3100400),the Key Technologies R&D Program of Guangdong(Grant No.2022B1111230001),the Project for Young Scientists of CAS(Grant No.YSBR-037),the Project for Basic and Applied Basic Research in Guangdong(Grant No.2021B1515020011),the Project of Youth Innovation Promotion Association of CAS(Grant No.2021347),the Project of Alliance of National and International Science Organizations for the Belt and Road Regions(Grant No.ANSO-CR-KP-2022-11),the Project of Guangdong Provincial Key Laboratory of Applied Botany(Grant No.2023B1212060046),and the Project of South China Botanical Garden,Chinese Academy of Sciences(Grant No.QNXM-01). （QNXM-01）
