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当前位置: 首页 > 文章 > 秸秆预处理对土壤微生物量及呼吸活性的影响 应用生态学报 2003,14 (12) 2225-2228
Position: Home > Articles > Effect of straw pretreatment on soil microbial biomass and respiration activity Chinese Journal of Applied Ecology 2003,14 (12) 2225-2228

秸秆预处理对土壤微生物量及呼吸活性的影响

作  者：
李贵桐;张宝贵;李保国
单  位：
中国农业大学资源与环境学院
关键词：
秸秆预处理;土壤微生物量;土壤微生物呼吸商
摘  要：
冬小麦秸秆经 8.0g·L-1H2 O2 (pH 11.0 )溶液、12 .5 g·L-1NaOH溶液或H2 SO4溶液浸泡 8h并80℃烘干后 ,与无机N一起加入土壤 ,进行室内 2 5℃恒温培养试验 ,在不同时间测定土壤微生物量C、N和CO2 释放速率 .结果表明 ,培养前期 ,秸秆预处理使土壤微生物量C数量增加了 1.0～ 1.4倍 ,但降低了土壤微生物的呼吸活性 ;培养后期 ,NaOH和H2 SO4处理使土壤微生物量C分别下降了 2 8%和 4 2 % ,但增加了土壤微生物的呼吸活性 ;H2 O2 处理则使土壤微生物量N增加 90 % ;土壤微生物区系中的真菌比例在不同时刻有所增加 .表明将秸秆预处理后施入土壤 ,将对土壤中微生物数量和呼吸活性产生一定影响
译  名：
Effect of straw pretreatment on soil microbial biomass and respiration activity
作  者：
LI Guitong,ZHANG Baogui,LI Baoguo ( College of Resource and Environment,China Agricultural University,Beijing 100094,China).
关键词：
Straw pretreatment, Soil microbial biomass, Soil microbial respiration activity
摘  要：
Winter wheat straw particles (0.5～2.0 mm) were soaked with 8.0 g·L -1 H 2O 2 (pH11.0),12.5 g·L -1 NaOH or H 2SO 4 solution for 8 h and dried at 80 ℃. Soils amended with the pretreated straw and inorganic N were incubated aerobically at 25 ℃ for 60 days. The CO 2 emission rate and soil microbial biomass C and N were measured at different time. The results showed that during the earlier stage of incubation,the pretreatments of straw increased soil microbial biomass C by 1.0～1.4 folds,but decreased soil microbial respiration activity. During the later stage of incubation,the NaOH and H 2SO 4 pretreated straw decreased soil microbial biomass carbon by 28% and 42%,respectively,while increased the soil microbial respiration activity. The straw pretreated by H 2O 2 increased soil microbial biomass nitrogen by 90% after the 15th day of incubation. The pretreatments of straw increased the fungi/bacteria ratio at different special time. It could be concluded that soil microbial biomass and respiration activity could be changed after the pretreated straw was added into the soil.

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