第2代杉木人工林地土壤微生物数量与土壤因子的关系  

Relation between the Quantity of Soil Microbe and Soil Factor in the Second Rotation Chinese Fir Plantation

作　　者：赵萌[1] 方晰[1] 田大伦[1] 

机构地区：[1]中南林业科技大学生态研究室,长沙410004

出　　处：《林业科学》2007年第6期7-12,共6页Scientia Silvae Sinicae

基　　金：国家科技部平台建设项目(2002-12-20);中南林业科技大学引进高层次人才科研启动基金项目"杉木林中氮的分异对碳循环的影响";中南林业科技大学青年基金项目(05044B);湖南省普通高校青年骨干教师培养对象项目资助

摘　　要：根据定位观测数据,对湖南会同第2代杉木人工林地土壤微生物数量与土壤因子的关系进行研究。结果表明：杉木人工林地土壤微生物数量以山洼最多,山坡次之,山脊最少;同一立地类型中,0-20cm土层中微生物数量最多,20-40cm次之,40-60cm最少;在同一立地类型中,微生物总数、细菌的数量秋季最高,冬季最低,而真菌和放线菌的数量夏季最高,秋冬两季最低;同一立地类型的板栗林地土壤微生物总数高于杉木人工林地;微生物总数与土壤含水率呈极显著线性正相关（P〈0.01）,细菌、放线菌的数量与土壤含水率呈显著线性正相关（P〈0.05）,真菌的数量与土壤含水率不具有相关性（P〉0.05）;细菌、真菌、放线菌的数量和微生物总数与10cm处土壤温度不具有相关性（P〉0.05）;细菌、真菌的数量和微生物总数与土壤有机碳含量、全氮含量呈极显著线性正相关（P〈0.01）,放线菌的数量与土壤有机碳含量、全氮含量呈显著线性正相关（P〈0.05）。土壤温度、土壤含水率、土壤有机碳含量及全氮含量对杉木人工林地土壤微生物数量的贡献率为60%-70%。Based on the data collected from located observation, the relation between the quantity of soil microbe and soil factor was studied in the second rotation Chinese Fir plantation at Huitong, Hunan Province. The result shows that in the same watershed, the quantity of soil microbe on hillfoot is the most, the secondly is on hillside, and that on ridge is the least. At the same type of site, the quantity of microbe in 0 - 20 cm soil layer is the most, the secondly is in 20 - 40 cm soil layer, and the least is in 40 -60 cm soil layer. The total of microbe and the quantity of bacteria reach the highest in autumn but the lowest in winner, while the quantity of fungi and actinomycetes reach the highest in summer, the lowest in winner and autumn. The total of microbe in Chinese chestnut forest soil is more than that in Chinese Fir plantation. The total of microbe is highly remarkable positive linear correlated with soil moisture content （ P 〈 0.01 ）, the quantity of bacteria and actinomycetes are also remarkable positive linear correlated with it （ P 〈 0.05）, while fungi do not correlate （ P 〉 0.05） ; The quantity of bacteria, fungi, actinomycetes and the total of microorganisms are not correlated with the soil temperature of the 10 cm soil depth （ P 〉 0.05） ; The quantity of bacteria, fungi and the total of microbe are highly remarkable positive linear correlated with soil organic carbon and soil total nitrogen content （P 〈 0.01 ）, and the quantity of actinomycetes shows remarkable positive linear correlated with soil organic carbon and soil total nitrogen content （ P 〈 0.05 ）. The contribution ratio of the soil temperature, soil moisture content, soil organic carbon content and soil total nitrogen content to the quantity of soil microorganisms in Chinese Fir plantation range from 60 % to 70%.

关 键 词：第2代杉木人工林 土壤微生物数量 土壤因子 

分 类 号：Q938.13[生物学—微生物学]