ALLEVIATION OF ALUMINIUM TOXICITY BY CALCIUM IN BRASSICA JUNCEA (L.) CZERNJ & COSSON | BIONATURE

On a crop plant (Brassica juncea L. Czernj & Cosson), the ameliorative effect of Ca on Al toxicity was investigated, which involved an affordable and practical technique to contain the toxicity by soil amendments with some salts of Ca, which are available locally and plentifully. A dose of 1200 g g–1 Ca as CaCO3 was shown to be sufficient to protect the crop against rhizotoxicity caused by 500 g g–1 Al. To determine which anionic moiety of calcium (CaCO3, CaSO4.2H2O, CaCl2.2H2O) is most suited for pot culture, a comparative research of several salts of calcium (CaCO3, CaSO4.2H2O, CaCl2.2H2O) was conducted. The salt of CaCO3 proved to be the most effective, increasing soil pH more than the other two salts tested. Our research also indicated that Brassica plants irrigated with local tubewell water were devoid of Al-induced harmful effects, even when significantly less Ca-salt was supplied to the soil. The findings were further backed up by Al and Ca biochemical tests.

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