PERTUMBUHAN DAN PRODUKSI JAGUNG MANIS {ZEAMAYS VARSACCHRATA STURT) PADA TANAH GAMBUT YANG DI APLIKASI AMELIORAN DREGS DAN FOSFATAIAM

Abstract

Maize production technologies that are available on the fertile land has been able to increase prodnctivityfrom 5.0 to 10.0 tons of dry beans per hectare, but the technology on marginal lands such as peatbinds are notyet avaihibte so its productivity is veiy low. Dregs is alkaline and conuins essential macro and mkro nutrientsso it has potential to be applied as fertilizer and ameliorant in peat The research aimed to study the growth andproduction of sweet com, with application of iregs as ameiiorant and phosphorus source. Peat soil wasobtained from experiment plot, faculty- of ^ricuHure in Rambo Panjang village, Kampar and firqpi was obtainedfrom PT RAPP Kcrinci, Riau. Experiments used completely randomized design of factorial 4x4 which werearacliorant dregs (0, S, 10 and 15 tons/ha) and source of phosphate (SP-M, FA Huinan China, ChristmasIsland and Petrokimia Gresik) and each treatment was repeated 3 times. Dregs characterization resultsshowed that solid waste is not identified as waste according to Rcgulatkin No. B3. No. 18 Jo. 8S Year in 1999.Dregs Applications of 5 tons / ha increased dry weight of straw and crop production of 93-97% and 106-l<3*^ respectively on each source of phosphate compared with no application of dregs. Tbe highest dryweight of straw and production of about 150-260% were obtained at dregs application of 10 tons / ha whiledregs application of 10 tons / ha resulted in the highest production of about 150-260%.