Pertumbuhan Tanaman Dan Kadar Kalsium Hijauan Sorgum Manis (Sorghum Bicolor (L).moench) Dengan Pemupukan Fosfat Dan Organik (Plant Growth and Calsium Content of Sweet Sorghum Forage (Sorghum Bicolor (L). Moench) with Phosphate and Organic Fertilization)

Abstract

The aim of this study was to examine the effect of phosphate and organic fertilization on the growth and calsium (Ca) content of sorghum forage. The materials in this study were sweet sorghum seeds, manure, manure \u27plus\u27 (manure + rock phosphate were decomposed together), charcoal, rock phosphate 27% P2O5 and triple super phosphate(TSP) 46% P2O5 as well as the sulphate ammonium (AS) 21% N and KCl 50%K2O as a basic fertilizer.The experiment was conducted in a Randomized Complete Block Design (RCBD) with 8 treatments and 3 replications. Fertilizing treatments of this research was T0 = Control, T1 = Manure, T2 = Manure + rock phosphate, T3 = Manure + TSP, T4 = Manure ‘plus\u27, T5 = Manure + rock phosphate + charcoal, T6 = Manure + TSP + charcoal, T7 = Manure ‘plus\u27 + charcoal. The parameters were plant height, crude protein (CP) content and Ca content of sorghum forage at the first cutting (40 days)and second cutting (40 days after the first cutting). The data were analyzed using ANOVA, then followed by Duncan\u27s multiple range test (DMRT).The results showed that manure \u27plus\u27 resulted Ca content of first cuttingthat was significantly higher than that of manure + rock phosphate, manure and control. Manure \u27plus\u27 resulted in plant height and Ca content on both cutting (first and second cutting) similar to manure + TSP. Manure \u27plus\u27 + charcoal resultedin plant height of second cuttingsimilarto manure + TSP + charcoal.The conclusionof thisresearchisorganic+P fertilizationtreatment either used or without used charcoal was able to increase height ofsorghumplant on second cutting. Treatmentof manure+TSP+charcoalresultthe highestCacontent of sorghumforage onfirst cutting