Effects of Lime Application on Cadmium Accumulation of Rice in Acidiccd-Confaminated Paddy Soils
To investigate the application methods and rates of lime on rice grain yield and content of Cd in brown rice, ifeld experiments were conducted in acidic Cd-contaminated paddy soils in 2013 and 2014. The lime was applied using basal application and dressing application at rates of 375, 750 and 1 125 kg/hm2. The results indicated that application of lime increased the rice grain yield by 20 to 760 kg/hm2. Soil pH was signiifcantly increase by lime application, reaching the largest value of 0.3. And the content of Cd in brown rice reduced by the application of lime. Moreover, the reduce effect was better in dressing application than in basal application. In two years, the content of Cd in brown rice in dressing application of lime at 1 125 kg/hm2 treatment was lower than National Food & Health Standard limit (0.2 mg/kg). In conclusion, the dressing application of lime at 1 125 kg/hm2 during last booting stage could be recommended for acidic Cd-contaminated paddy soil.
NETL
NSTL
万方数据
维普
