湖南会同第2代杉木人工林地土壤酶活性  

Soil Enzyme Activity of the Second-generation Chinese Fir Plantation In Huitong County,Hunan Province

作　　者：秦国宣[1] 方晰[1] 田大伦[1] 徐桂林[1] 

机构地区：[1]中南林业科技大学生态研究室,湖南长沙410004

出　　处：《中南林业科技大学学报》2008年第2期1-7,共7页Journal of Central South University of Forestry & Technology

基　　金：科学技术部"会同杉木林生态系统野外科学观测研究"(2004-522);国家林业局软科学项目(2007-R23);中南林业科技大学生态学国家重点学科;中南林业科技大学引进高层次人才科研启动基金项目;中南林业科技大学青年基金项目(05044B);2006年度湖南省普通高校青年骨干教师培养对象项目资助

摘　　要：为探讨湖南会同第2代杉木人工林林地土壤质量状况,研究了林地土壤酶活性特点及其与土壤肥力的关系.结果表明：随着第2代杉木林林分年龄的增长,土壤酶活性呈递减趋势;土壤酶活性随土壤深度增加而下降,0-30 cm土层中的酶活性明显高于30-60 cm土层;立地条件不同,土壤酶活性也不同,山顶和山脊土壤酶活性明显低于山腰,而山腰又低于山洼,自然恢复杉木林地（Ⅶ区）的土壤酶活性明显高于20年生的第2代杉木人工林地（Ⅲ区）;各种土壤酶活性夏季最高,其它季节酶活性因不同酶而异,土壤酶活性与土壤其它肥力因素的关系密切,林地土壤中各种酶活性之间共同作用影响土壤养分状况.To learn more about the soil quality of the second-generation Chinese fir plantation, this paper conducted a characteristic study, in Huitong County, Hunan Province, of soil enzyme activity and relationship between the activity and other factors of soil fertility. The results show that there are close relations between soil enzyme activity and other factors of soil fertility; that soil enzyme activity in natural recovery forest （Ⅳ plot）is apparently higher than that in the 20-year-old second-generation Chinese fir plantation（ Ⅲ plot）; that the catalase, phosphates and urease activity in ridge soil is lower than that in hillside soil and the enzyme activity in hillside soil is lower than that in valley soil; that with the age increment of the Chinese fir plantation, the soil enzyme activity shows a reducing tendency; and that the enzyme activity varies with the eco-environment; the activity of all four soil enzymes in 0-30 cm soil layer is totally higher than that in 30-60 cm layer, enzyme activity in summer is bigger than that in other seasons, and activity variation during spring, autumn and winter depends on different enzymes. On the whole, there is a collective action of various soil enzymes upon soil fertility.

关 键 词：微生物学 湖南会同 第2代杉木人工林 土壤酶活性 土壤肥力 

分 类 号：S154.2[农业科学—土壤学]