Method for exploring influence of Cd absorption and accumulation during different growth periods of paddy rice on rice cadmium accumulation

The invention relates to a method for exploring the influence of Cd absorption and accumulation during different growth periods of paddy rice on rice Cd accumulation. Specifically, a Kimura nutrient solution B is utilized for a water culture experiment of paddy rice; addition of exogenous low-concentration Cd is not carried out after different growth periods until paddy rice is cultured to be matured; Cd content of brown rice is measured; and by ''subtraction'', recursion is carried out on Cd content of brown rice in each treatment. By the above method, contribution percentage of Cd absorbed and accumulated during different rice growth periods to rice Cd accumulation is obtained so as to obtain the influence of Cd absorbed and accumulated during different rice growth periods on rice Cd accumulation after absorption, accumulation and transport during the growth process.