| 洞庭湖湿地土壤碳、氮、磷及其与土壤物理性状的关系 |
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| 引用本文： | 彭佩钦,张文菊,童成立,仇少君,张文超.洞庭湖湿地土壤碳、氮、磷及其与土壤物理性状的关系[J].应用生态学报,2005,16(10):1872-1878. |
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| 作者姓名： | 彭佩钦 张文菊 童成立 仇少君 张文超 |
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| 作者单位： | 湖南农业大学资源环境学院，中国科学院亚热带农业生态研究所亚热带农业生态重点实验室，长沙410125华中农业大学资源环境学院，武汉430070，中国科学院亚热带农业生态研究所亚热带农业生态重点实验室，长沙410125，湖南农业大学资源环境学院，湖南农业大学资源环境学院 长沙410128中国科学院亚热带农业生态研究所亚热带农业生态重点实验室，长沙410125，长沙410128中国科学院亚热带农业生态研究所亚热带农业生态重点实验室，长沙410125，长沙410128中国科学院亚热带农业生态研究所亚热带农业生态重点实验室，长沙410125 |
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| 基金项目： | 中国科学院知识创新工程项目（KZCX3-SW-426、KZCX1-SW-01-14）、国家重点基础研究发展规划项目（2002CIM15203）和中国科学院知识创新笾鐾煎煎章助项目（02200220020223）. |
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| 摘 要： | 以洞庭湖3类典型湿地的8个土壤剖面为代表,研究了土壤碳、氮、磷,微生物量碳、氮、磷和土壤物理性状的分布特征.结果表明，土壤表层有机碳含量为19.63～50.20 g·kg-1,微生物量碳为424.63～1 597.36 mg·kg-1,微生物量碳占有机碳的比例为3.17%～4.82%;土壤表层全氮1.85～4.45 g·kg-1,微生物量氮57.90～259.47 mg·kg-1,微生物量氮占全氮的比例3.13%～6.42%;土壤表层微生物量磷含量顺序为：湖草洲滩地(200.99 mg·kg-1)>垦殖水田(163.27 mg·kg-1)>芦苇洲滩地(24.16 mg·kg-1),微生物量磷占全磷的比例为1.09%～11.20%；土壤表层容重0.65～1.04 g·cm-3；土壤表层粘粒(<0.001 mm)26.24%～39.48%.土壤表层有机碳、全氮、微生物量氮、微生物量磷的含量,湖草洲滩地>垦殖水田>芦苇洲滩地.土壤表层微生物量碳,垦殖水田和湖草洲滩地接近,而大于芦苇湿地；土壤表层容重,芦苇洲滩地>垦殖水田>湖草洲滩地；土壤表层<0.01 mm、<0.001 mm粘粒,湖草洲滩地、芦苇洲滩地>垦殖水田.湿地土壤剖面中有机碳、微生物量碳、全氮、微生物量氮、微生物量磷、容重以及微生物量碳占有机碳的比例、微生物量氮占全氮的比例、微生物量磷占全磷的比例均随深度的增加而降低,至一定深度稳定,而土壤全磷在剖面上下的差异很小.湿地土壤微生物量碳、氮、磷之间呈极显著的正相关关系；土壤容重与有机碳、全氮、微生物量碳、氮、磷之间呈极显著指数负相关关系.湿地土壤<0.001 mm粘粒与有机碳、全氮、微生物量碳、氮、磷含量呈极显著对数正相关关系.
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| 关 键 词： | 湿地 土壤微生物量碳氮磷 容重 粘粒 土壤剖面 |
| 文章编号： | 1001-9332(2005)10-1872-07 |
| 收稿时间： | 2004-12-07 |
| 修稿时间： | 2005-04-04 |
Soil C,N and P contents and their relationships with soil physical properties in wetlands of Dongting Lake floodplain |
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| PENG Peiqin ,ZHANG Wenju ,TONG Chengli,QIU Shaojun ,ZHANG Wenchao.Soil C,N and P contents and their relationships with soil physical properties in wetlands of Dongting Lake floodplain[J].Chinese Journal of Applied Ecology,2005,16(10):1872-1878. |
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| Authors: | PENG Peiqin ZHANG Wenju TONG Chengli QIU Shaojun ZHANG Wenchao |
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| Affiliation: | College of Resource and Environment, Hunan Agricultural University, Changsha 410128, China. pqpeng@isa.ac.cn |
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| Abstract: | Eight representative soil profiles were installed on three types of wetland (two profiles on Carex spp. -dominated floodplain, four on Phragmites-dominated floodplain, and two on paddy soil) in Dongting Lake floodplain of China in 2004, and their C, N and P contents, microbial biomass C, N and P, <0.001 mm clay particles, and bulk density were measured. The results indicated the spatial distribution of soil C and N and soil microbial biomass C, N, and P were very similar in the profiles (0-100 cm) of three types of wetland, being decreased gradually with depth, except for soil TP which was constant in the profiles. The percentages of soil microbial biomass C, N and P to soil organic C, total nitrogen and total phosphorus decreased gradually with depth. In top layer (0-10 cm), the contents of soil organic C and microbial biomass C and the percentage of soil microbial biomass C to organic C were 19.63-50.20 g x kg(-1), 424.63 - 1 597.36 mg kg(-1), and 3.17% - 4.82%, respectively, the contents of soil total N and microbial biomass N and the percentage of soil microbial biomass N to total N were 1.85-4.45 g x kg(-1), 57.90 - 259.47 mg x kg(-1), and 3.13% - 6.42%, respectively, and the content of soil microbial biomass P and the percentage of soil microbial biomass P to soil total P was 24.16 - 200.99 mg x kg(-1) and 1.09% - 11.20%, respectively. The bulk density of soil top layer (0 -10 cm) was 0.65 - 1.04 g x cm(-3), and the content of < 0.001 mm clay particles was 26.24% - 39.48%. The contents of soil organic C and N and microbial biomass N and P in 0 - 10 cm layer were the highest in Carex spp.-dominated floodplain, followed by paddy soil, and Phragmites-dominated floodplain. Also in 0 - 10 cm layer, the soil microbial biomass C in Carex spp. dominated floodplain and paddy soil was higher than that in Phragmites-dominated floodplain, while the soil bulk density in Phragmites-dominated floodplain was higher than that in paddy soil, and much higher than that in Carex spp. -dominated floodplain. The amount of soil < 0.001 mm clay particles in Carex spp. -dominated floodplain and Phragmites-dominated floodplain was higher than that in paddy soil. In these three types of wetland, soil organic C and N and microbial biomass C, N and P had a significant logarithm correlation (P < 0.01) with <0.001 mm clay particles, and a significant index correlation (P <0.01) with bulk density. |
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| Keywords: | Wetland Soil microbial biomass C N and P Bulk density Soil clay granule Profiles |
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