赤红壤、砖红壤矿物油污染效应研究

Study of the Polluting Effect of Minerak Oil in Lateritic Red Earth and Laterite

本研究采用盆栽试验法,研究了赤红壤、砖红壤中矿物油对水稻、花生的生理生态影响和矿物油在土壤中的净化。研究结果表明:矿物油对第一季水稻生长发育影响不大,对第二季则表现出明显的抑制作用,低浓度矿物油对花生生长发育有促进作用,高浓度则对其起抑制作用;收获后,水稻各部分及水稻土,花生根及花生土油残留均与投油量呈极显著的直线正相关关系,油在作物根部最易积累;种植两季水稻后,油在赤红壤、砖红壤中的净化率分别为80％以上和50％左右。最后,根据上述研究确定了赤红壤、砖红壤的矿物油临界含量分别为270.90mg/kg和318.92mg/kg。

This research studies the effects of mineral oil of Lateritic Red Earth and Laterite on the paddy's and peanut's physico-ecologies and the reduction of mineral oil in these soils by the pot-planting simulation test.The results indicate that:① mineral oil has a little effect on the growth and development of the first season paddy and seriously bad effect on the second season paddy, while low concentration mineral of oil promotes the growth and development of peanut and high concentration restrains them; ② after harvesting,there are remarkable linear correlationships between the mineral oil residues of paddy (grain,stem and root),paddy soil,peanut root and peanut soil and the quantity of the mineral oil put into soil,and the mineral oil accumulates easiest in plant roots; ③ after planting two season pad-dies.the reduction rate of mineral oil in Lateritic Red Earth is more than 80% and in Laterite is about 50%.Finally,it determines the critical content of mineral oil in Lateritic Red Earth and Laterite according to preceding studies.The critical content of mineral oil in Lateritic Red Earth is 270.90mg / kg and in Laterite is 318.92mg / kg.