The influence of sodium humate on N, P, K, Ca, Mg and Cd uptake by spring barley
2000
Malis, L. | Kovacik, P. (Slovenska Polnohospodarska Univ., Nitra (Slovak Republic). Katedra Agrochemie a Vyzivy Rastlin)
An influence of sodium humate on the sorption of some macroelements (N, P, K, Ca, Mg) and cadmium by the spring barley organs was investigated in pot trial in vegetation cage during two years. It was found out sodium humate application together with rational rate of NPK-fertilizers positively influenced grain yield of spring barley as well as the thousand grain weight. This application decreased high-significanntly the contents of K,Ca and Mg in spring barley grain. On the other side, the decrease of N and P contents in grain was not significant. From the point of view of whole-grain cereal consumption quality this fact is being evaluated negatively. Humate caused the reduction of accumulated cadmium level in grain, straw and roots of barley (reduction of cadmium in grains was significant). Utilization of humate assumes simultaneous application of fertilizers to get higher uptake of nutrients by yield as a consequence. Application of humate in soil contamined by cadmium not only restricts the input of cadmium into food chain, but also partly increases nutritional value of grain. There was found out a negative correlation between cadmium content in soil and phosphorus content in barley organs
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