土壤学报2025，Vol.62Issue(6)：1755-1765,11.DOI:10.11766/trxb202406290265
秸秆预处理方式对秸秆在土壤中矿化和激发效应的影响
The Influence of Straw Treatment Methods on Straw Mineralization and Priming Effects in Soil
摘要
Abstract
[Objective]The application of crop straw to soil is a popular strategy for managing cropland soil.However,the effects of pre-treatment of crop straw on its decomposition and priming effect in soil have received little attention.[Method]In this study,the structure,mineralization,and priming effect of pyrolyzed,biodegraded,and raw corn straw in the soil were investigated through an incubation experiment combined with the natural abundance approach.[Result]The results showed that the cumulative carbon mineralization of straw materials in soil within 60 days followed the order biodegraded straw(1 945 mg·kg-1),raw straw(1 576 mg·kg-1),pyrolyzed straw(27 mg·kg-1).The priming effect of pyrolyzed and raw straw on the mineralization of native soil organic matter was persistently negative and positive,respectively.Also,the priming effect of biodegraded straw changed from positive in the initial stage of incubation to negative in the latter period of incubation.Both raw and biodegraded straw significantly increased the abundance of fungi and the activities of β-glucosidase and cellulase in soil(P<0.05),however,pyrolyzed straw did not significantly affect the fungal abundance and the activities of β-glucosidase and cellulase.High-throughput sequencing revealed that biodegraded straw significantly increased the relative abundance of Actinobacteria while raw straw significantly increased the relative abundance of Firmicutes(P<0.05).[Conclusion]Because of low mineralization and negative priming effect,pyrolyzed straw showed higher potential than biodegraded and raw straw in the sequestration of soil organic carbon.关键词
矿化作用/激发效应/热解秸秆/腐解秸秆/土壤Key words
Mineralization/Priming effect/Pyrolyzed straw/Biodegraded straw/Soil分类
农业科技引用本文复制引用
YANG Xin,ZHU Jun,REN Tao,LI Xiaokun,LU Jianwei..秸秆预处理方式对秸秆在土壤中矿化和激发效应的影响[J].土壤学报,2025,62(6):1755-1765,11.基金项目
国家重点研发计划项目(2021YFD1901204)资助 Supported by the National Key Research and Development Program of China(No.2021YFD1901204) （2021YFD1901204）
