Peningkatan Produktivitas Padi Hibrida Melalui Pemberian Pupuk N Dengan Sistem Ratun Di Lahan Pasang Surut

The study aimed to determine the increase in productivity of hybrid paddy with a ratoon system at several doses and application of N fertilizer on swamp land. The study was conducted in April - August 2019 in the Banyuasin District Agricultural Service Experimental Field, using a Factorial Randomized Block Design which was repeated three times. The factors studied consisted of; Treatment dose of fertilizer (N):dose of 90 kg N / ha (N1), dose 135 kg N / ha (N2). Treatment application of fertilizer (A): application of ½ dose fertilizer at planting + ½ dose phase primordia (A1); fertilizer application 1/3 dose at planting + 1/3 dose phase primordia + 1/3 dose at harvest (A2), fertilizer application 1/3 dose at planting + 1/3 dose phase primordia + 1/6 dose at harvest + 1 / 6 doses 21 days after harvest (A3). The results showed that the dosage and application of N fertilizer affected the increase in productivity of main and hybrid hybrid rice in swamp land, increased productivity of hybrid rice at several doses and the application of N fertilizer
ranged from 37.3 to 63.2%. The highest productivity increase was obtained in the treatment of fertilizer dose 135 kgN / ha and its application 1/3 dose at planting + 1/3 dose at primordia and 1/3 dose at harvest, which was 63.2% or grain yield of 7.28 tons /Ha