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黔中地区土壤酶活性对岩性的响应

2017-09-14符裕红彭琴李安定黄宗胜

湖北农业科学 2017年16期

符裕红++彭琴++李安定++黄宗胜

摘要:选择黔中喀斯特地区6种不同岩性(玄武岩、石英砂岩、长石石英砂岩、变余砂岩、第四纪红色黏土、煤系砂页岩)发育的土壤为研究对象,通过采样并测定其土壤酶活性指标、土壤肥力指标,分析土壤酶活性及其与肥力因子的关系。结果表明,①土壤酶活性对岩性的响应,除淀粉酶外,其他土壤酶活性指标均存在明显差异;②玄武岩发育的土壤酶活性表现最好,脲酶、过氧化氢酶、多酚氧化酶活性最高;③土壤酶活性与所对应的肥力因子间密切相关。

关键词:土壤酶活性; 肥力因子; 岩性; 黔中喀斯特地区

中图分类号:S158;S714 文献标识码:A 文章编号:0439-8114(2017)16-3070-04

DOI:10.14088/j.cnki.issn0439-8114.2017.16.017

Response of the Soil Enzyme Activities to Lithology in Central Area of Guizhou

FU Yu-hong1,PENG Qin2,LI An-ding3,HUANG Zong-sheng4

(1.College of Chemistry and Life Sciences,Guizhou Normal University,Guiyang 550018,China;2.Southwest Guizhou Vocational and Technical College for Nationalities,Xingyi 562400,Guizhou,China;3.Guizhou Institute of Mountain Resources, Guiyang 550001,China;

4.College of Architecture and Urban Planning, Guizhou University, Guiyang 550025,China)

Abstract: Taking six different type of rocks soil(basalt, quartz sandstone,feldspar quartz sandstone,palimpsest sandstone,quaternary red clay,coal measure arenaceous shale) in the karst region of central Guizhou as the research object,through the sampling and determination of the index of soil enzyme activity and soil fertility factors,the soil enzyme activity and its relationship with fertility factors were analyzed. The results showed that:①Response of soil enzyme activities to lithology,in addition to starch enzyme,the other soil enzyme activity index showed very obvious differences;②Soil enzyme activity of basalt development was the best performing,and urease,catalase,polyphenol oxidase activity were the highest;③Soil enzyme activity and the corresponding fertility factors had the close realationship.

Key words: soil enzyme activity; soil fertility factors; rock type; the karst region of central Guizhou

貴州省是中国西南喀斯特地貌发育的中心[1],区域内岩石类型多样,土壤浅薄不连续,垂直分异强烈[2],水分、养分调蓄能力低[3],土壤环境脆弱,不同岩性土壤养分存在显著差异[4]。土壤作为森林生态系统的重要资源,其养分直接影响了植物和作物的生长发育,土壤酶是土壤新陈代谢的重要因素[5],它参与了土壤中许多重要的生物化学过程和物质循环,与土壤肥力密切相关[6],还易受环境中物理、化学和生物因素的影响[7];土壤酶与肥力因子之间的关系一直是各类土壤环境研究的热点问题[8]。在喀斯特地区,关于土壤酶的研究主要集中在不同的土地利用方式[9]、不同植被类型条件[10]、不同退化和恢复阶段[11,12]的土壤酶活性变化,针对土壤酶与肥力因子的研究,在非喀斯特区相对甚多[7],但在喀斯特区的研究则主要表现在人工林方面[8]。……

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