Kajian Pengelolaan Hara Spesifik Lokasi Padi Sawah Irigasi di Kabupaten Buru

Abstract

Assessment on Site-Specific Nutrient Management of Irrigated Rice in Buru Region. Recommended dose of package fertilize which is widely applied by administrative boundaries or district is less appropriate with principles of site-specific nutrient management (SSNM). Fertilizer recommendations should be based on soil fertility status (SFS) and plant responses to fertilization in a specific yield target. Analysis spatial data are available online with Geographic Information Systems (GIS) can be used in a rapid, inexpensive and relatively accurate to help map SFS and fertilizer recommendations. The purpose of this study was to determine the dose and N, P and K fertilizer recommendation maps for paddy on each SFS mapping unit in Waeapo Plains, Buru. Omission plot trials were conducted at 12 locations. Mapping fertilizer recommendations were made by spatial analysis using software Krigging Interpolator of ArcView GIS. The results showed that the target of sustainable rice yield ranged from 6.40 to 6.75 t paddy/ha. The need for fertilizer N, P and K on lowest SFS is 120.20 kg N/ha, 13.03 kg P/ha and 58.12 kg K/ha. While at low SFS is 136.53 kg N/ha, 13.46 kg P/ha and 58.97 kg K/ha. The areas were divided into five fertilizer recommendations based on SFS and target sustainable yield rice namely SR-I 14,830.02 ha area; SR-II covering 4,722.42 ha; R-I covering 3,763.67 ha, R-II covering 1,022.11 ha and R-III with an area 1510.60 ha. Analysis of satellite imagery with GIS can be used to map the SFS and site-specific fertilizer recommendations in a rapid, inexpensive and accurate