摘要
在稻田养蟹生态系统中,研究稻蟹共作对稻田土壤理化性质的影响。结果表明,稻蟹共作提高了土壤中全氮、全磷的含量,显著地增加了土壤中NH4+、速效磷含量,而对土壤中NO3-影响不显著;相对于不养蟹稻田,由于河蟹的存在,稻蟹共作降低了土壤pH,显著增加了粒径>0.2 mm团聚体的含量,显著降低了粒径<0.002 mm微团聚体的含量,稻田土壤水稳性团聚体数量增加,土壤团聚化程度加强,降低了土壤容重,改善了土壤质地。
The effects of integrated rice-crab production on soil physical and chemical properties were studied. Integrated rice-crab production could increase the content of total nitrogen, total phosphorus, NH4^＋-N and available P of paddy soil, while had no obviouse impact on the content of soil NO3^--N. The integrated production also reduced soil pH. In addition, the integrated production increaed the cotent of larger aggregates （〉0.2 mm） remarkably, reduce the cotent of smaller aggregates （〈0.002 mm） significantly and increased the number of water stable aggregate. These results showed that integrated rice-crab production improved some of the chemical properties of paddy soil and soil texture
出处
《湖北农业科学》
北大核心
2011年第19期3948-3952,共5页
Hubei Agricultural Sciences
基金
农业部优质蟹种规模化繁育与养殖示范项目(nyhyzx07-045)
上海市重点学科建设项目(Y1101)
上海市中华绒螯蟹产业技术体系建设
关键词
稻蟹共作生态系统
土壤理化性质
氮素
磷素
integrated rice-crab ecosystem
soil physical and chemical properties
nitrogen
phosphorus
