Application Of Organic Fertilizer From Livestock Waste To Increase Inorganic Fertilizer Use Efficiency In Tomato Crop Cultivation

The research objective was to determine application impact of organic fertilizer from livestock dunks on vegetative growth and yield quality of tomato. It was conducted in Indralaya from October 2013 to February 2014. Method used in this study was Completely Randomized Design with three replications. The treatments were as follows : Po = control; P1 = recommended dose of inorganic fertilizer (135 kg N. Ha-1 , 75 kg PZOS.ha-1 , and 110 kg K20 ha (RR)); P2 = organic fertilizer from cow dunk at dose of 10 ton.ha-1 + RR; P3 = organic fertilizer from cow dunk at dose of 10 ton.ha + 50% RR; P4 = organic fertilizer from buffalo dunk at dose of 10 ton.ha-1 + RR; P5 = organic fertilizer from buffalo dunk at dose of 10 ton.ha-1 + 50% RR; P6 = organic fertilizer from chicken dunk at dose of 10 ton.ha-1 + RR; P7 = organic fertilizer from chicken dunk at dose of 10 ton.ha + 50% RR; P8 = organic fertilizer from goat dunk at dose of 10 ton.ha-1 + RR and P9 = organic fertilizer from goat dunk at dose of 10 ton.ha + 50% RR. The result showed that soil fertility can be improved by application of livestock dunk-based organic fertilizer. The best organic fertilizer was organic fertilizer from chicken dunk. Application of recommended inorganic fertilizer at half dose combined with several organic fertilizers from livestock dunk showed higher yield than that of inorganic fertilizer at recommended dose. This in turn had increase the use efficiency of inorganic fertilizer as well as had produced higher yield of tomato.