关键词: 水稻, 早熟品种, 栽培方式, 镉含量

Abstract: The cadmium accumulate rule in grain of different rice varieties under different cultivation methods were studied. The results showed that, the soil cadmium content of the three test points were 0.188 mg/kg, 0.749 mg/kg, 1.420 mg/kg, and the pH values were 6.41, 5.80, and 7.29, respectively; the average cadmium content in grain under the transplanting mode of the three experimental sites were 0.093 mg/kg, 0.944 mg/kg, and 2.494 mg/kg, respectively, and the average cadmium content in grain under the direct seeding mode was 0.071 mg/kg, 0.434 mg/kg, and 0.243 mg/kg, respectively. It can be seen that the soil cadmium content has a decisive effect on the cadmium content of rice, and the soil pH value has a significant impact on the cadmium adsorption of rice; different early-maturing varieties also have significant differences in the absorption of cadmium in the soil . Therefore, in cadmium-contaminated areas, direct seeding cultivation, proper improvement and adjustment of soil pH, and selection of low-cadmium adsorption varieties are simple, practical and reliable important means to reduce cadmium pollution and ensure food safety.

Key words: rice, early maturing varieties, cultivation methods, cadmium content