COMBINATION OF MANURE AND AGRICULTURAL LIME AS REMEDIATION STRATEGY FOR CADMIUM TOXICITYIN THE COASTAL RURAL AREA OF BENGKULU

Abstract

Cadmium, a dangerous heavy metal, was contaminated in environments that caused toxicity in crops and humans. This phenomenon led to opposite conditions with government policies for food security in the future. It was getting severe through agricultural practices such as phosphor fertilizer and chemical pesticides. This study aimed to interpret kinds of manure and lime for reducing cadmium contaminant in Inceptisols and Entisols. This research was conducted by 3 parallel designs such as kind of manures, levels of CaCO₃ and divergence of dolomite and Ca(OH)₂. The first design used chicken manure, goat manure and cow manure with 7 treatments such as M0 (no manure), M1(10 ton ha^-1 chicken manure), M2 (20 ton ha^-1 chicken manure), M3 (10 ton ha^-1 goat manure), M4 (20 ton ha^-1 goat manure), M5 (10 ton ha^-1 cow manure), and M6 (20 ton ha^-1 cow manure). The second design utilized 3 levels of CaCO₃ were C0 (0-ton ha^-1 CaCO₃), C1 (2,5 tonnes ha^-1 CaCO₃), and C2 (5 tonnes ha^-1 CaCO₃). The third design applied dolomite and Ca(OH)₂ with 2 ton ha^-1 dosage. The results described kinds of manure and agricultural lime had been reducing Cadmium in the soil yet. Meanwhile, chicken manures with 10 tonnes ha^-1 lead to down toxicity as much as 19,2 ppm than other manures. Even CaCO₃ did not significantly drop off contamination, but there was a significant interaction between Inceptisol and Entisol as absorbing this element. The experiment of manures and lime were delivering to us that both can raise acidic reaction in soil yet could not lower Cadmium content in soil.