城市不同绿地类型土壤有机碳的垂直分布特征及储量  

Vertical Distribution Characteristics and stock of Soil Organic Carbon in Different Types of Urban Green Space

作　　者：李金全[1,2] 王晶 曾文静[1,2] 郭利成[1,2] 李熙波[1,2] 

机构地区：[1]福建师范大学地理科学学院,福建福州350108 [2]湿润亚热带山地生态省部共建国家重点实验室培育基地,福建福州350007 [3]福建省福州市闽江公园管理处,福建福州350002

出　　处：《安徽农业科学》2011年第21期12787-12788,12802,共3页Journal of Anhui Agricultural Sciences

基　　金：国家自然科学基金项目(31000321);福建省大学生创新性实验计划项目(Fjnu2010-010);福建师范大学本科生课外科技规划项目(BKL2010-043)

摘　　要：基于重铬酸钾氧化—外加热法,分析福州市区3种土地覆被类型(黄花槐片林、番石榴片林和草坪)SOC的垂直分布特征。结果表明,3种土地覆被类型中,草坪SOC含量最大,番石榴片林和黄花槐片林SOC含量相当;草坪SOC储量最大,其次是黄花槐片林,番石榴片林最小;同一覆被类型SOC含量随土层深度增加而减小;草坪、黄花槐片林与番石榴片林0～10cm土层的SOC含量分别占0～40cmSOC含量的60.9%、51.5%和49.3%,其中草坪0～10cm土层的SOC含量最高,达(27.17±0.48)g/kg,分别比黄花槐片林与番石榴片林高出43.1%和44.9%。一方面,这是由于草坪根系多而浅,地表凋落物输入也集中在表层;另一方面,受人为管理的影响,片林地表凋落物的输入大大减少。Based on the potassium dichromate oxidation-external heating method,three land cover types（Surattensis woodlots,Guava woodlots and Zoysia matrella lawn） of soil organic carbon（SOC） of the vertical distribution in Fuzhou were analyzed.The results showed that,among three types of land cover,SOC content of the lawn was the largest,while SOC contents of Surattensis woodlots and Guava woodlots were relatively lower and quite similar between each other.The lawn had the largest SOC stock,followed by Surattensis woodlots,Guava woodlots was the smallest.SOC content decreased with soil depth in all cover types.The proportions of top soil（0-10 cm） SOC content accounted for 60.9%,51.5% and 49.3% of 0-40 cm SOC content in the lawn,Surattensis woodlots and Guava woodlots,respectively.The 0-10 cm SOC content of lawn was the highest,reaching（27.17 ± 0.48） g/kg,which was 44.9% and 43.1% higher than Surattensis woodlots and Guava woodlots,respectively.The main reason of the high SOC content in lawn ecosystem was that the lawn had a shallower root system than the forests.What＇s more,the human management,removing the litter out of forest land,was likely resulted in this phenomenon.

关 键 词：SOC 垂直分布 土地覆被类型 城市绿地 

分 类 号：S158[农业科学—土壤学]