摘要
2007年和2008年对稻-鱼(泥鳅)复合生态系统的水田土壤理化性状进行了定位定量研究。与对照相比,养鱼稻田土壤容重平均降低0.09 g/cm3,土壤总孔隙度平均提高9.15%,>0.25 mm团聚体平均增加4.64%,土壤碱解氮、速效磷含量高于对照处理,差异均为极显著(p<0.01);土壤分散系数平均减少6.25%,结构系数平均增加8.30%;土壤氧化还原电位平均增加16.5 mV,还原物质总量、活性还原物质含量、Fe2+含量和活性有机还原性物质含量分别平均降低0.42、0.46、0.26和0.21 cmol/kg。养鱼稻田土壤的通气性、结构稳定性和团聚化程度增强,分散性减弱。底栖鱼类有效改善了稻田土壤理化性状。
The physical and chemical properties of paddy soils in a flee-fish （Misgurnus anguillicaudatus ） integrated ecosystem were investigated by plot experiments in 2007 and 2008. Compared with the control paddy fields, in rice-fish paddy fields the soil bulk density decreased by 0. 09 g/cm^3, soil total porosity increased by 9. 15%, 〉0. 25 mm soil aggregate increased by 4. 64%, available nitrogen and phosphorus contents in soil were higher （ p 〈 0. 01 ） . Soil dispersion coefficient decreased by 6. 25%, while structure coefficient increased by 8. 30%. Soil Eh increased by 16. 5 mV, reducing matter, active reducing matter, Fe^2＋ content, and active organic reducing matter decreased by 0. 42 cmol/kg, 0. 46 cmol/kg, 0. 26 cmol/kg and 0. 21 cmol/kg, respectively. In rice-fish paddy fields, the aeration, structure stability, aggregation of soil were promoted, the dispersion was reduced. The benthic fish improved effectively the physical and chemical properties of paddy soil.
出处
《中国土壤与肥料》
CAS
CSCD
北大核心
2009年第4期21-24,47,共5页
Soil and Fertilizer Sciences in China
基金
吉林省人才开发资金项目
吉林省科技发展计划项目(20060577)
吉林省教育厅科技计划项目(20061132007169)
教育部留学回国人员科研启动基金项目(教外司留2005-546)
人事部留学人员科技活动择优资助项目
东北师范大学自然科学青年基金项目(20050406)
关键词
稻-鱼复合生态系统
水田
土壤质量
理化性状
生物扰动
flee-fish integrated ecosystem
paddy field
soil quality
physical and chemical property
bioturbation
