SITE-SPECIFIC FERTILIZATION FOR LOWLAND RICE PRODUCTION IN WEST KALIMANTAN

Application of fertilizer recommendations until now is generally treated equally in all locations. The variety of soil fertility in location was not relevant to use one dosage fertilizer recommendation. The purpose of this study was determine rice of recommendation dosage of NPK phonska fertilizer in rice fields. This study compared the fertilization treatments of NPK phonska based on the method of field experiments in rice fields by using a randomized block design, where each treatment was repeated four times. The treatment were P0 : without NPK Phonska and Urea fertilizer (control), P1 : NPK Phonska 300 kg ha-1 and Urea 200 kg ha-1, P2 : NPK Phonska 200 kg ha-1 and Urea 235 kg ha-1, P3 : NPK Phonska 250 kg ha-1 and Urea 220 kg ha-1, P4 : NPK Phonska 350 kg ha-1 and Urea 180 kg ha-1. The results showed plant highest in the treatment of P2 at 106 cm, where the fertilization treatment of NPK Phonska at 200 kg ha-1 and Urea at 235 kg ha-1. The fertilization with NPK Ponska 350 kg ha-1 and Urea 180 kg ha-1 (P4) showed the most number of tillers at 12.2 tillers and the highest of grain weight per hill at 29 grams. It can produce dry grain (stand for 14%) at 7.5 t ha-1 and the profits is IDR 22,773,581,00