Low and Medium Cd Stress and Foliage Fertilizer: Effects on Growth and Cadmium Accumulation Regulation of Rice

doi:10.11924/j.issn.1000-6850.casb17050041

Abstract

Abstract: To investigate the effects of self- made multi- nutrients foliar fertilizer on rice growth and Cd accumulation, a pot experiment was conducted with‘Zhongzao 39’rice variety. The effects of foliar fertilizer on rice growth, Cd distribution in different parts, Cd enrichment and transport were measured during the experiment. The relationship between the Cd content in grain and other organs was also analyzed. The effects of five foliar fertilizers on reducing Cd in rice grain was S> P> Se>Mg> Si, and the Cd content decreased by 73.50%, 66.41%, 58.55%, 58.50% and 46.86%, respectively. The enrichment coefficient of Cd in rice grain decreased by 73.5% and the Cd transport coefficient decreased by 72.9% under sulphur foliar fertilizer treatment. Compared with the other four foliar fertilizers, the sulphur foliar fertilizer has better effect on reducing Cd content, however, the effect of silicon foliar fertilizer on rice growth, yield and Cd reduction efficiency is the best among the five foliar fertilizers, rice stem is the most important part influencing the Cd content in grains, and one of the main pathways for Cd accumulation.

CLC Number:

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