Pollution Effect and the Accumulative Rules of Lead in the Loam Soil/Rice System
KANG Li juan 1,ZHAO Cheng ai 1,LI Na 2 (1.Department of Basic Science, Jilin Agricultural University,Changchun 130118; 2.Siping Grain College of Jilin Province, Siping 136000)
The pot experiment was conducted to study on the pollution effect and the residual rules of lead in the loam paddy soil/rice system The results showed that the toxicity effect of lead on rice was not serious and decreased yield about 2%～17% when lead rates were 180～720?mg/kg The tissues of rice contents increased with the lead addition in the soil The accumulation order of lead was rootstem and leafgrain Lead residual amount of rice seed was less than the food hygiene standard, the critial concentration in the soil was 241?mg/kg (total) and 49 mg/kg (DTPA exrtacted)。
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