Application of micro fertilizers and seed bomb on the growth of swamp jelutung (Dyera polyphylla (Miq.) Steenis) and paddy (Oryza sativa L.) on peat soil

Abstract Peatland degradation requires accelerated rehabilitation through species selection, such as swamp Jelutung ( Dyera polyphylla ) and Inpara 2 paddy ( Oryza sativa ). Additionally, fertilizers with seed-coating (seed bombs) can improve the plants’ growth. This study aimed to analyze the effect of micro-fertilizers and seed bomb techniques on developing D. polyphylla and paddy in peat soil. The design of the growth experiment used a completely randomized design (CRD) with the factor of micro fertilizers application (consisting of micro-crystalline cellulose (MK), micro-lignocellulose (ML), activated micro-carbon (MT), and non-activated micro-carbon (MNT) with concentrations of 1%, 3%, 5%, and 7%) and the form of seed bomb (ball and box). The results showed that applying micro fertilizers and seed bombs can increase pH, macronutrients, and micronutrients, as well as reduce Al content in the soil. Application of MK3% (seedbox), MK7% (seedball), MK5% (seedbox), MK3% (seedbox), and MK7% (seedball) resulted in the best growth of D. polyphylla in percent germination, plant height, root length, wet weight, and dry weight respectively. The best paddy growth was shown in MNT3% (seedbox), MK5% (seedball), MNT5% (seedbox), MT1% (seedbox), and MK7% (seedball) treatments in percent germination, plant height, root length, wet weight, and dry weight respectively.