原油污染土壤对蔬菜幼苗生长的影响

目的]探讨土壤原油污染对农作物及土壤的影响。方法]每盆装土样1 kg,按土壤中原油浓度为0、100、500、1000、5000、15000、30000mg/kg处理土壤,测量2种蔬菜的发芽率、幼苗高度、根系长度、幼苗总鲜重。结果]萝卜幼苗对原油的敏感度明显高于黄瓜。当处理剂量为1000~30000 mg/kg时,2种蔬菜幼苗总鲜重与对照间都呈极显著差异。处理剂量对2种蔬菜幼苗总鲜重均具有显著线性负相关;处理剂量为500~30000 mg/kg时,2种蔬菜根系长度与对照间呈现极显著差异。原油处理剂量与黄瓜和萝卜根系长度间具有较好的线性关系,线性系数分别为-0.8441和-0.7945。结论]土壤原油污染对2种蔬菜幼苗的相对抑制率表现为根系长度大于幼苗总鲜重。

Effects of Soil Polluted by Crude Oil on Seedling Growth of Vegetables

Objective] The study was to discuss the effects of crude oil pollution to crop and soil.Method] Each pot was filled with 1 kg air dried soil sample,and the crude oil was used to treat the soil with different concn.of 0,100,500,1 000,5 000,15 000,30 000 mg/kg.The germination rate,seedling height,root length,seedling total fresh weight of the 2 kinds of vegetables were detected.Result] The sensitivity of turnip seedling to crude oil was obviously higher than that of cucumber.There was significant difference between the total fresh weights of 2 vegetable seedlings and CK,when the treating dosage was 1 000-30 000 mg/kg.There was very significantly negative linear correlation between the treating dosage and the total fresh weight of 2 vegetable seedlings.There was significant difference between the root length of 2 vegetables and CK when the treating dosage was 500-30 000 mg/kg.A good linear relationship was existed between the treating dosage and the root length of the cucumber and turnip,and their linear coefficients were r=-0.844 1 and r=-0.794 5 resp.Conclusion] The relative inhibitory rates of crude oil pollution to 2 vegetable seedlings showed that of the root length was bigger than that of total fresh weight of seedlings.