草业学报2025，Vol.34Issue(9)：53-64,12.DOI:10.11686/cyxb2024415
长期不同果园生草覆盖下土壤碳矿化及其温度敏感性研究
Soil carbon mineralization in an orchard with and without interplanted ground cover species and its temperature sensitivity under long-term conditions
摘要
Abstract
Establishing ground cover is an eco-friendly orchard management method,but it is still poorly understood how different types of cover affect soil carbon mineralization and its temperature sensitivity.Based on a 28-year long-term monitoring experiment in Yuchi Village,Youxi County,Fujian Province,we investigated the changes in the soil mineralization rate and its temperature sensitivity in orchards with three different ground cover management strategies;clear tillage,and orchard interplanting with the legumes round-leaf cassia(Chamaecrista rotundifolia)or Arachis pintoi.The overall aim of this work was to provide a theoretical basis for reducing emissions of carbon sequestered in soil and for the scientific management of orchards in subtropical regions under climate change.The results showed that,compared with clear tillage,the interplanting treatments led to increased soil organic carbon content(SOC)(by 19.20%-30.04%)after 28 years.Across both interplanting modes,the cumulative mineralization of SOC was positively correlated with the incubation time and temperature.At 35℃,the highest cumulative mineralization of SOC was in the A.pintoi interplanting treatment(633.41 mg·kg-1),followed by the C.rotundifolia interplanting treatment;their SOC values were 72.75%and 61.27%higher than that of the clear tillage treatment,respectively.The potential mineralization was increased by 2.98 times in the A.pintoi interplanting treatment and by 1.14 times in the C.rotundifolia interplanting treatment,compared with the clear tillage treatment.Under high-temperature conditions(>25℃),the soil mineralization temperature sensitivity coefficient(Q10)of the A.pintoi interplanting treatment and the C.rotundifolia interplanting treatment were 35.20%and 47.37%lower,respectively,than that of the clear tillage treatment.In conclusion,long-term ground cover increased the SOC content of soil,and with increasing temperatures(>25℃),the temperature sensitivity of SOC mineralization in the soil decreased,and the response of the soil carbon pool to temperature change increased.Among the tested treatments,the A.pintoi interplanting treatment was more beneficial than the C.rotundifolia interplanting treatment.关键词
果园生草覆盖/土壤有机碳/矿化速率/温度敏感性Key words
orchard grass cover/soil organic carbon/mineralization rate/temperature sensitivity引用本文复制引用
陈俊玲,王莎莎,叶菁,林怡,王义祥..长期不同果园生草覆盖下土壤碳矿化及其温度敏感性研究[J].草业学报,2025,34(9):53-64,12.基金项目
中央引导地方科技发展专项(2023L3022),福建省自然科学基金(2023J01191)和福建省农业科学院协同创新工程项目(XTCXGC2021010)资助. （2023L3022）
