Characteristics of cadmium absorption by spinach and estimation of cadmium content in spinach by soil analysis
2008
Sunakawa, T. | Sodegaki, K. | Yasuda, M. | Sawano, S.
Cadmium(Cd) in soil absorbed by spinach is considered to be in exchangeable form mostly, and in inorganic binded form and other forms partially. Cd content in food section of spinach was fluctuated with difference of harvesting stages, and these fluctuation were differed by each of spinach varieties. In addition, there were spinach varieties which were decreased or not decreased Cd content with higher pH. Thus share of Cd in each chemical form absorbed by spinach are expected to be difference by each of spinach varieties. During cultivating spinach with gleysol, there were increase that Cd in exchangeable form and Cd content in food section of spinach. Therefore, when cultivating crops with no-paddy field converted from paddy field, the Cd content of crops are expected to be higher than with perennial no-paddy field. By combining soil analysis each Cd concentration in soil, coloration of water extraction of soil and nitrogen in soil, it was possible of rough estimating hazardous level of Cd content in spinach.
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