Nitrogen content, nitrate reductase activity, and biomass of kimpul (Xanthosoma sagittifolium) on shade and nitrogen fertilizer variation
Daftar Isi:
- Latifa IC, Anggarwulan E. 2009. Nitrogen content, nitrate reductase activity, and biomass of kimpul (Xanthosomasagittifolium) on shade and nitrogen fertilizer variation. Nusantara Bioscience 1: 65-71. The mains of this research were to study theeffect of shade and nitrogen fertilizer variation and also their interaction to nitrogen content, nitrate reductase activity, and biomass ofkimpul (Xanthosoma sagittifolium (L.) Schott.). This research was arranged in randomized complete block design (RCBD) with twofactor, they were shade variation which contained 3 levels (0%, 50%, and 75% of shade) and nitrogen fertilizer dosage variation whichcontained 4 levels (0; 0.0625; 0.125; dan 0.25 g ZA/kg of soil of the dosage of ZA fertilizer). The variables of the research werenitrogen content, nitrate reductase activity, fresh weight, dry weight, and shoot/root ratio. The collected data were analyzed with GeneralLinear Model Univariate, and continued with Duncan’s Multiple Range Test (DMRT) on 5% significantly levels. The result showed thatthe shade treatment affected nitrogen content, fresh weight and shoot/root ratio. The fertilizer application and the interaction betweenshade and fertilizer application was affected to all variabels. The treatment of 75% shade and 0.25 g ZA/kg of soil of ZA fertilizerdosage increased nitrogen content (5.32%) and fresh weight (420.88 g). The treatment without shade and 0.25 g ZA/kg of soil, dosage ofZA fertilizer increased nitrate reductase activity (260.58 ÃŽÂ1⁄4 mol NO2-/g/hour) and dry weight (53.92 g). The treatment of 50% shade and0 g ZA/kg of soil of ZA fertilizer dosage increased shoot/root ratio (0.98).