| 上海典型植物群落土壤有机碳矿化特征 |
| |
| 引用本文： | 郝瑞军,方海兰,沈烈英,车玉萍.上海典型植物群落土壤有机碳矿化特征[J].浙江林学院学报,2010,27(5):664-670. |
| |
| 作者姓名： | 郝瑞军 方海兰 沈烈英 车玉萍 |
| |
| 作者单位： | 1. 上海市园林科学研究所,上海,200232
2. 中国科学院,南京土壤研究所,土壤与农业可持续发展国家重点实验室,江苏,南京,210008 |
| |
| 基金项目： | 上海市科技兴农重点攻关项目 |
| |
| 摘 要： | 选择上海市5种典型植物群落采样并布置室内恒温培养试验，观测了土壤有机碳矿化量大小及动态变化过程，并比较了不同植物群落土壤有机碳矿化特征差异。结果表明，不同群落间土壤有机碳、微生物量碳质量分数差异显著，但均高于草坪；而同一群落内土壤有机碳、微生物量碳则随土层深度的增加而逐渐下降；培养期间，土壤有机碳矿化量高低顺序为桂花Osmanthus fragrans＞草坪（黑麦草Lolium perenne）＞樟树Cinnamomum camphora＞池杉Taxodium ascendens＞竹林（孝顺竹Bambusa multiplex），不同植物群落间差异达显著水平（P＜0.05）；同一群落土壤有机碳矿化量随土层的加深而递减，但不同群落间递减幅度存在差异，其中降幅最大为池杉，降幅最小分别为桂花（20 ～ 40 cm）和竹林（40 ～ 60 cm）；培养期间，各植物群落土壤有机碳矿化动态变化过程趋势相同，均表现为培养前期快速下降，培养后期保持相对稳定的趋势，与培养时间之间符合对数关系，而有机碳累计矿化量与培养时间则符合显著的线性关系，各群落高低顺序为桂花＞草坪＞樟树＞池杉＞竹林。研究结果初步表明，相对于草坪，深根系植物能有效提高土壤有机碳和微生物量碳，提高土壤有机碳库质量分数。图3表4参20
|
| 关 键 词： | 土壤学 植物群落 有机碳矿化 微生物量碳 矿化率 |
Soil organic carbon mineralization with urban plant communities in Shanghai |
| |
| HAO Rui-jun,FANG Hai-lan,SHEN Lie-ying,CHE Yu-ping.Soil organic carbon mineralization with urban plant communities in Shanghai[J].Journal of Zhejiang Forestry College,2010,27(5):664-670. |
| |
| Authors: | HAO Rui-jun FANG Hai-lan SHEN Lie-ying CHE Yu-ping |
| |
| Institution: | 1.Shanghai Institute of Landscape and Gardening,Shanghai 200232,China;2.State Key Laboratory of Soil and Sustainable Agriculture,Institute of Soil Science,Chinese Academy of Sciences,Nanjing 210008,Jiangsu,China) |
| |
| Abstract: | Soil samples for five typical urban plant communities：Osmanthus fragrans,Lolium perenne,Cinnamomum camphora,Taxodium ascendens,and Bambusa multiplex,were collected in Shanghai Gongqing Forest Park.Laboratory incubation tests were then used to analyze soil microbial biomass carbon（MBC） and to examine soil organic carbon（SOC） mineralization with its dynamic patterns.Analyses included fitting to a logarithmic equation and a correlation analysis.Results showed that SOC and MBC had significant differences among the different plant communities,but both decreased with increasing soil depth.Daily SOC mineralization was significantly different（P0.05） with O.fragransL.perenneC.camphora T.ascendens B.multiplex.For a given plant community,SOC mineralization decreased as soil depth increased with the extent of decrease different for each plant community.SOC mineralization patterns for all plant communities were alike：decreasing rapidly as incubation began and then being relatively constant fitting a logarithmic equation.Cumulative SOC mineralization was O.fragranL.perenneC.camphora T.ascendensB.multiplex and was linearly correlated with the incubation time.Thus compare to lawn（L.perenne）,deep-rooted plants could increase SOC and MBC,thus increasing the soil carbon pool. |
| |
| Keywords: | soil science plant community soil organic carbon mineralization microbial biomass carbon rate of soil organic carbon mineralization |
| 本文献已被 维普 万方数据 等数据库收录！ |
| 点击此处可从《浙江林学院学报》浏览原始摘要信息 |
|
