Pengaruh Bahan Organik Dan Pupuk Npk Terhadap Hasil Serat Rosela Di Lahan Podsolik Merah Kuning Kalimantan Selatan

Abstract

Effect of NPK fertilizer and organic materials on rosellafiber yield in red yellow podzolic soil of South KalimantanRed yellow podzolic soil is potential for rosella development. Themajor problem of red yellow podzolic soil is low fertility of soil, especiallymacro and micro elements, high content of Al and Fe and P fixation oftenhappened. The soil capacity can be improved by application of ameliorantmaterials such as lime or organic materials. The experiment was conductedin Sabuhur II Village, Jorong Sub District, Tanah Laut District in SouthKalimantan during growing season of January to December 2001. Theexperiment was designed in split-plot with three replications. The mainplots were source of organic materials (1) cows manures, (2) chickenmanures, (3) compost of rice hays, (4) compost of alang-alang, and (5)compost of rosella stems with dose 5 t/ha respectively. The sub plots werethe dosage of NPK fertilizer (A) zero fertilizer, (B) 45 kg N + 80 kg P 2 O 5 +60 kg K 2 O /ha, and (C) 90 kg N + 80 kg K 2 O 5 + 60 kg K 2 O/ ha. The rosellaclone was CPI 115357 line, plot size 4 m x 6 m, and plant spacing 20 cm x20 cm. The purpose of this experiment was to find out the kind of organicmaterials and dosage of unorganic fertilizer which can support rosella fiberyield in red yellow podzolic soil of South Kalimantan. The result showedthat the application of 5 tons chicken manures + 45 kg N + 80 kg P 2 O 5(rock phosphate) + 60 kg K 2 O/ha gave the best plant height, stemdiameter, fresh and dry fiber yield of rosella which were 262,33 cm; 17,65mm; 47,76 tons and 2,83 tons respectively