重庆市江津区紫色土壤基本性质对土壤硒含量的影响

Effects of Basic Properties of Purple Soil on Soil Selenium Content in Jiangjin District of Chongqing City

[目的]研究重庆市江津区紫色土壤基本性质对土壤硒含量的影响。[方法]以重庆市江津区农业土壤为研究对象,分析该地区土壤基本性质以及土壤中不同形态硒含量,探讨土壤基本性质对土壤总硒、水溶性硒、Olsen硒含量的影响。[结果]紫色土壤中总硒、水溶性硒、Olsen硒与土壤基本性质密切相关。总硒与水溶性硒呈极显著负相关,而与Olsen硒呈极显著正相关;土壤中硒含量与成土母质有一定的关系,但同时受外源因素影响;土壤p H与总硒、水溶性硒、Olsen硒均存在极显著正相关,其中酸性土壤中硒含量相对较高;随着有机质含量的增加,土壤中总硒、水溶性硒含量逐渐增加,而Olsen硒含量逐渐降低。[结论]该研究为调节土壤中硒含量、改良植物硒营养以及防治、控制硒反应病提供理论依据。

[ Objective] To study effects of the basic conditions of the purple soil on soil selenium in Jiangjin district of Chongqing City. [ Method ] Using soil selenium in Jiangjin district in Chongqing agricultural soil as the main research object, soil basic properties in the region and different forms of selenium content in soil were analyzed, and effects of soil conditions on content of water solulde seleinum, Olsen selenieum in the soil were discussed. [ Result ] The total selenium, water soluble selenium, Olsen selenium in purple soil were closely related to the basic properties of the soil. Total selenium had extremely significant negative correlation with water-soluble selenium, and total selenium was significantly positively correlated with Olsen selenium ; Selenium content in the soil had a certain relationship with the parent material, but was also affected by exogenous factors;Soil pH and total selenium ,water soluble selenium, Olsen selenium showed extremely significant positive correlations, and in acidic soil selenium content was relatively large;With the increase of organic matter content, total selenium and water soluble selenium content increased gradually,while Olsen selenium content gradually reduced. [ Conclusion] The study provides theoretical basis for adjusting the selenium content in soil, improving plant selenium nutrition and prevention and control of selenium reaction disease.