Abstract

With Chinese cabbage (Brassica chinensis l) as the test material in pot experiments, the effects of sodium humate on Chinese cabbage biomass, cadmium uptake and accumulation as well as the soil available cadmium content were studied, to provide a reference for sodium humate anti-heavy metal stress research. The results showed that when a suitable amount of sodium humate was fertilized, even Cd polluted soil could promote Chinese cabbage root system growth and the fresh weight increased, as well as the stems and leaves biomass. In addition, as the soil available Cd content decreased, the absorption and accumulation in the stems and leaves was reduced. The optimum fertilization amount was 1.00 g/kg soil. Correlation analysis indicated that sodium humate was significantly or extremely significantly negatively correlated to soil available Cd. Therefore, sodium humate was the main factor that affected the soil available Cd content.

Keywords:

Cadmium stress, Chinese cabbage (Brassica chinensis L), nutrition indexes, sodium humate, soil available Cd,

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