Application of local resource-based amelioration technology on the chemical properties of Inceptisols in monoculture and polyculture cultivation systems

Abstract

The impact of using chemical fertilizers in the cultivation system changes the soil’s physicochemical characteristics. Local resources-based amelioration technology can be used as a solution to increase soil fertility and plant productivity. This study aimed to measure changes in the chemical properties of Inceptisols in monoculture and polyculture cultivation systems. A randomized block design was used in this research with eight treatments and three replications. Treatments were carried out with equivalent doses: control; bamboo biochar (BB)+ Tithonia green fertilizer(TGF)+manure+compost; BB+TGF+manure; BB+TGF+compost; BB+manure+compost; TGF+manure+compost; conventional technique and Ministry of Agriculture recommendation (MAR). The results showed that the addition of ameliorant tended to have higher pH than conventional and control. The highest organic-C of the monoculture was obtained in TGF+manure+compost, which was 0.39; 0.49; and 0.47 more elevated compared to the control, conventional technique, and MAR. Meanwhile, the highest organic-C in the polyculture system was found in BB+TGF+manure and almost the same as BB+manure+compost, but higher by 1.15, 1.01, and 1.01 compared to control, conventional, and MAR. The available-P in the monoculture system was almost the same for all treatments, while for the polyculture system, BB+manure+compost, BB+manure+compost, and MAR showed that the values were almost the same and higher than the others.