Optimalisasi Respon Ganda Pada Metode Permukaan Respon (Response Surface) Dengan Pendekatan Fungsi Desirability (Studi Kasus Mencari Dosis Pupuk Yang Optimal Pada Padi IR64)

Abstract

Fertilization technology by using inorganic substance is an effort in improving productivity of rice. Giving nitrogen fertilizer, phosphor and potassium in IR64 (type of rice) is expected can improve productivity and optimal nutrition absorption. Desirability function is a method for combining single response, nutrition absorption and productivity component, become multi response. That response has limit value which must be fulfilled. Then, created multi response is optimized together by using response surface methodology. In the dry season, the optimal fertilizer dose of multi response is nitrogen fertilizer at 140 kg/ha, phosphor at 21,54 kg/ha and potassium at 100 kg/ha. In this dose will be gotten the average optimal response with malai in the number of 298,75 malai/m2, 91,27 % of brown rice, productivity at 6267,57 kg/ha, nitrogen absorption at 21,83 kg/ha, phosphor absorption at 3,57 kg/ha and potassium absorption at 17,98 kg/ha. In the wet season, the optimal fertilizer dose of multi response is nitrogen fertilizer at 40 kilograms per hectares, phosphor 25 kg/ha, potassium at 0 kg/ha. In this dose will be gotten the average optimal response with malai in the number of 279,88 malai/m2, 83,98 % of brown rice, productivity at 5703,88 kg/ha, nitrogen absorption at 22,59 kg/ha, phosphor absorption 4,04 kg/ha and potassium absorption 11,80 kg/ha.