UTILIZATION OF PALM OIL MILL SOLID WASTE AND INORGANIC FERTILIZERS ON CHINESE KALE (Brassica alboglabra) IN EX COAL MINING SOIL

Abstract

The purpose of this experiment is to evaluate the best combination of inorganic fertilizers and organic material from palm oil mill waste decanter cake, which give the best Chinese kale growth and yield at ex-coal mined soils. This is a pot research, conducted at Agricultural Farm, Agriculture Faculty, Jambi University, using RCBD with one factors and 11 treatments of combinations of NPK + Decanter Cake fertilizer from palm oil mill solid waste. The parameters observed were increase in plant height and number of leaves, leaf area and plant fresh weight. The results showed, the best treatments for increasing plant height and number of leaves was achieved at 50% of NPK from recommended doses with DC 20 ton/ha or 75% of NPK with DC 20 tons per hectare. For leaf area and plant fresh weight (yield), was achieved at 50 percent of NPK from recommended doses + DC 15 tons per hectare. The conclusion of this research is to increase chienese kale growth and yield in ex-coal mining soil can be done by fertilizing NPK 50 percent from recommended doses + decanter cake 15 tons per hectare.

Soybean Yield Optimization by Utilizating the Solid Waste of Oil Palm Factory

“…This study indicates that the use of decanter cake can reduce the use of inorganic fertilizers by half the recommended dose. Likewise, Chinese kale grown in ex-coal mining media showed the highest fresh weight was achieved at an amount of 20 tons ha -1 of decanter cake without chemical fertilizers or 15 tons ha -1 of decanter cake with chemical fertilizers (Duaja et al, 2020)…”

Empowerment of Farmer Groups in Rambahan Village in Processing Palm Oil Mill Waste into Organic Fertilizers for Porang (Amorphophallus muelleri) Plantation

“…Demonstrate how to make and use tools and apply them in the decanter cake process into solid fertilizer and liquid fertilizer with cow urine LOM and snail LOM (Andriani, 2019), (Asroh & Novriani, 2019), (Kurniawan et al, 2020) and (Madusari et al, 2021). Apply solid and liquid fertilizers to demonstration plots and on porang plants that are one year old in farmers' yards and gardens and (Duaja, Kartika, & Fransisca, 2020). For the Implementing Team, regular monitoring is carried out by site visits to the DEMPLOT location every two weeks.…”

OPTIMIZATION OF SOYBEAN GROWTH AND PRODUCTION THROUGH THE USE OF COMBINATION OF DECANTER CAKE WITH CHICKEN MANURE (Glycine Max (L.) Merril )

“…Demikian juga pada tanaman kedelai di tanah gambut, hasil kedelai terbaik pada perlakuan DC 15 ton/ha yang dikombinasi dengan pupuk kimia 50 persen dari dosis anjuran (Duaja et al, 2019) . Demikian juga pada tanaman Kailan (Duaja et al, 2020), namun karena kalian ditanam di tanah bekas tambang hasil terbaik pada dosis DC 20 ton/ha kombinasi dengan pupuk kimia 50 persen. Berdasarkan hal tersebut, maka untuk mensubsitusi kebutuhan unsur hara tanaman kedelai maka DC yang diberikan dikombinasi dengan bahan organik yang lain.…”