低丘侵蚀红壤复垦后土壤微生物特征研究
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S154.3 S155.25

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国家自然科学基金资助项目!(批准号 496 710 5 0 )


Research on Characteristics of Soil Microbe in Hilly Eroded Red Soil after Reclamation
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    摘要:

    侵蚀红壤复垦培肥后 ,随着地面覆盖度的增加 ,土壤结构、土壤通气性、土壤养分状况得到改善 ,各侵蚀观测小区的年径流量、侵蚀模数、土壤流失量急剧降低 ,土壤微生物量、土壤呼吸强度、土壤酶活性均有较大幅度的提高 ,并且其在各小区的分布趋势与土壤养分和土壤水稳性团聚体的分布趋势相一致 ,说明侵蚀红壤经耕作培肥后 ,土壤有机残体的分解强度和腐殖质的合成过程得到加强 ,土壤肥力处于不断的恢复和提高过程当中 ,从土壤微生物和土壤酶活性增强的幅度来看 ,林地要优于草地 ,在林地中阔叶林优于混交林优于针叶林 (杉木林 ) ,而且随着复垦年限增加 ,土壤培肥效果更加显著

    Abstract:

    With improvement of soil structure, soil aeration, soil nutrient status in eroded red soil, amounts of annual runoff, land loss and erosion module decreased sharply, soil microbe, soil biomass, soil respiration and soil enzymatic activities had been increased greatly, also their distribution was similar to that of soil nutrient content and soil water stable aggregates in these observed district. The results indicated that with reclamation of eroded red soil, the process of soil organic remnant decomposition and humus compound had been strengthened, soil fertility had continually been recovered. Effects of different utilization patterns on soil microbe and enzymatic activities were compared. Woodlands were better than grasslands, broadleaf forest was better than conifer forest. With the time of reclamation prolonged, effects of reclamation were much more obvious.

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柳云龙 吕军 等.低丘侵蚀红壤复垦后土壤微生物特征研究[J].水土保持学报,2001,(2):64~67

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