盐城海滨湿地盐沼植被及农作物下土壤酶活性特征  

Distribution of the soil enzyme activities in different vegetation zones and farms in Yancheng coastal wetland

作　　者：毛志刚[1,2] 谷孝鸿[1] 刘金娥[3] 任丽娟[3] 王国祥[3] 

机构地区：[1]中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室,南京210008 [2]中国科学院研究生院,北京100049 [3]南京师范大学地理科学学院江苏省环境演变与生态建设重点实验室,南京210046

出　　处：《生态学报》2010年第18期5043-5049,共7页Acta Ecologica Sinica

基　　金：国家水专项资助项目(2008ZX07101-012-02);国家重点基础研究发展计划资助项目(2008CB418104);江苏海滨湿地保护与土地利用潜力评价资助项目(JS-908-02-07)

摘　　要：在盐城海滨湿地盐沼植被和农田内采集土壤样品,测定了4种土壤酶(脲酶、转化酶、过氧化氢酶和碱性磷酸酶)的活性,分析了盐沼植被、农作物及土壤理化因子对土壤酶活性的影响。结果表明:由海滨湿地滩涂围垦形成的各类农田其土壤酶活性较高,且均高于湿地盐沼植被;湿地盐沼植被下4种土壤酶活性均高于无植被生长的光滩,且不同类型植被间土壤酶活性差异显著;4种酶的活性大小总体表现为大豆(Glycine max)地>棉花(Gossypium hirsutum)地>玉米(Zea mays)地>互花米草(Spartina alterniflora)滩>白茅(Imperata cylindrica var.major)滩>碱蓬(Suaeda salsa)滩>光滩。相关分析表明,4种土壤酶之间及其与土壤有机碳、全氮均表现出显著正相关,而与土壤盐分、pH值之间存在显著负相关。海滨湿地盐沼植被的发育扩展不仅增加了土壤中的养分含量,也提高了土壤酶活性。Soil samples were collected from natural vegetation zones and farms in the Yancheng coastal wetland,Jiangsu province.The activities of soil enzymes （urease,invertase,catalase,alkaline phosphatase） were determined and the influence of salt marsh vegetation communities and soil physico-chemical properties on soil enzyme activities was discussed.The results showed that the activities of the soil enzymes in the natural vegetation zones were higher than those in the mudflat without vegetation and there were significant differences among different vegetation zones.However,the activities of soil enzymes in farms were higher than those in the natural vegetation zones and these enzyme activities were represented in the order as：Glycine max field Gossypium hirsutum field Zea mays field Spartina alterniflora flat Imperata cylindrica var.major flat Suaeda salsa flat mudflat.Significant positive correlations were found among different soil enzymes and among enzyme activities,soil organic carbon and total nitrogen,but there were negative correlations among enzyme activities and soil salinity and pH value.Soil fertility and enzyme activities were shown to be improved along the development of vegetation.

关 键 词：土壤酶 盐沼植被 农田 土壤理化因子 海滨湿地 

分 类 号：S154[农业科学—土壤学]