CAJ | 학술논문

为了探明土地利用方式对土壤微生物性质的影响，研究了湘中丘陵区6种土地利用方式（石栎+青冈常绿阔叶次生林、杉木人工林、毛竹林、苗圃、农用旱地、水田）土壤微生物指标（微生物生物量碳 Cmic、氮Nmic 含量、微生物熵、微生物生物量碳氮比、土壤基础呼吸强度、土壤微生物代谢熵）。结果表明，土地利用方式明显影响了土壤 Cmic、Nmic 含量，6种土地利用方式各土层 Cmic、Nmic 含量的变化趋势基本一致，与青冈+石栎常绿阔叶林相比，毛竹林、水田土壤 Cmic、Nmic 含量显著提高，而杉木人工林、苗圃、农用旱地却显著下降；6种土地利用方式各土层微生物熵的变化不一致，毛竹林、苗圃、农用旱地、水田土壤微生物熵普遍高于青冈+石栎常绿阔叶林，而杉木人工林最低；水田土壤 Cmic/Nmic 最高（9.35以上），青冈+石栎常绿阔叶林最低；青冈+石栎常绿阔叶林土壤基础呼吸强度、代谢熵最高，水田土壤基础呼吸强度较高，代谢熵最低，表明湘中丘陵区土壤微生物生物量主要受土壤有机碳源的制约，青冈+石栎常绿阔叶林土壤具有较多活性微生物种群，有机碳利用率较低，有利于土壤有机碳的积累，水田有机碳利用率较高。
위료탐명토지이용방식대토양미생물성질적영향，연구료상중구릉구6충토지이용방식（석력+청강상록활협차생림、삼목인공림、모죽림、묘포、농용한지、수전）토양미생물지표（미생물생물량탄 Cmic、담Nmic 함량、미생물적、미생물생물량탄담비、토양기출호흡강도、토양미생물대사적）。결과표명，토지이용방식명현영향료토양 Cmic、Nmic 함량，6충토지이용방식각토층 Cmic、Nmic 함량적변화추세기본일치，여청강+석력상록활협림상비，모죽림、수전토양 Cmic、Nmic 함량현저제고，이삼목인공림、묘포、농용한지각현저하강；6충토지이용방식각토층미생물적적변화불일치，모죽림、묘포、농용한지、수전토양미생물적보편고우청강+석력상록활협림，이삼목인공림최저；수전토양 Cmic/Nmic 최고（9.35이상），청강+석력상록활협림최저；청강+석력상록활협림토양기출호흡강도、대사적최고，수전토양기출호흡강도교고，대사적최저，표명상중구릉구토양미생물생물량주요수토양유궤탄원적제약，청강+석력상록활협림토양구유교다활성미생물충군，유궤탄이용솔교저，유리우토양유궤탄적적루，수전유궤탄이용솔교고。
To explore the influences of land-use types on soil microbial indicators, the soil microbial biomass carbon (Cmic), soil microbial biomass nitrogen (Nmic), ratios of Cmic to soil organic carbon (TTOC) and Cmic to Nmic, soil basic respiration (RSR) and ratio of RSR to Cmic (qCO2) were investigated in six different land use patterns (paddy field, slope farmland, nursery, Phyllostachys edulis stand, Cunninghamia lanceolata plantation, Lithocarpus glaber + Cyclobalanopsis glauca secondary forest) in hilly areas of central Hunan Province, China. The results show that the effects of land use patterns on the contents of Cmic and Nmic were significant, both of their variation trends in all soil layers were similar, and compared with (L. glaber + C. glauca secondary forest, the content of Cmic and Nmic significantly increased in both Phyllostachys edulis stand and paddy field, while the content of Cmic and Nmic significantly decreased in C. lanceolata plantation, nursery, slope farmland; The variation trends of Cmic/TTOC had differences in different soil layers among six different land use patterns, the Cmic/TTOC was higher in Phyllostachys edulis stand, nursery, slope farmland, paddy field more than that in L. glaber + C. glauca secondary forest, however that in C. lanceolata plantation was the lowest; The Cmic/Nmic was highest in paddy field (more than 9.35), however that in L. glaber+ C. glauca secondary forest was the lowest, both the SR and the qCO2 were highest in L. glaber + C. glauca secondary forest, the SR was higher but the qCO2 was lower in paddy field, which indicated soil microbial biomass was mainly controlled by soil organic carbon source in hilly areas of central Hunan Province, there was more active microbial populations and lower organic carbon utilization rate in L. glaber+ C. glauca secondary forest, but higher organic carbon utilization rate in paddy field.