Yuliana Galih Dyan Anggraheni, Fiqolbi Nuro, Yashanti Berlinda Paradisa. 2019 30 Effect of Organic Fertilizer on Growth and Yield of Chili Pepper Yuliana Galih Dyan Anggraheni a , Fiqolbi Nuro, and Yashanti Berlinda Paradisa a Research Center for Biotechnology-Indonesian Institute of Science (LIPI), Raya Bogor KM 46 Cibinong, Bogor 16911, Indonesia Abstract Many ways to increase the quality and quantity of chili pepper plant, one of them is by doing cultivation techniques improving. The Utilization of organic fertilizer such as compost and manure fertilizer, they can ameliorate soil texture as well as supply macro and micronutrients needed by the chili pepper. The research aimed to study the effect of organic and inorganic combination usage to plant growth and yield of chili peppers. This research arranged in randomized block design in triplicate with six treatment. Factors studied were fertilizers and varieties. There was three fertilizer tested treatment, urea 75 kg/ha + SP36 75 kg/ha + KCl 75 kg/ha (P0), compost+ urea 75 kg/ha + SP36 75 kg/ha + KCl 75 kg/ha (P1) and manure+ urea 75 kg/ha + SP36 75 kg/ha + KCl 75 kg/ha (P2). Two chili peppers varieties used in this research were Lado F1 (V1), and PM999 F1 (V2). Variables observed were plant height, stem diameter, total number of fruit, fruit weight, plant wet and dry weight. The results showed that addition of compost gave the highest growth and yield, followed by manure and control treatments. Lado F1 variety provides higher yields than PM999 F1 variety. The best treatment in this study was combination treatment of Lado F1 variety fertilized with urea 75 kg/ha + SP36 75 kg/ha + KCl 75 kg/ha with addition of 1.35 kg compost per planting hole with the result obtained at 253.35 g of fruit per plant. Keywords: inorganic fertilizer, chili pepper, combination fertilizer, compost, manure 1. Introduction Chili pepper (Capsicum annuum L.) is horticulture commodities with high economic value. It contains protein, fats, carbohydrates, calcium, vitamin A, B1 and C [1, 2]. Moreover, chili pepper contains capsaicin, capsicum, and bioflavonoids [2]. Chili pepper national scale consumption in 2006-2014 fluctuated but tended to increase. The increase in chili pepper consumption is 14% per year [3]. Chili peppers national demand is predicted around 720.000-840.000 tons/year [4]. Therefore, the production of chili pepper required to provide and to meet the demand of community and industry. Various ways were done to increase chili pepper growth and productivity. Cultivation technique by utilization organic and inorganic fertilizer combination is one of them. Organic fertilizer derived from wasting plant and animal, usually in solid or fluid form. Organic fertilizer can be manure or compost. Manure produced from livestock manure and compost produced from plants residues called humus which contains useful organic compound for plant. An organic fertilizer such as compost utilization giving Telp: +6221-8754587, Fax: +6221-8754588 E-mail address: yuliana.galih@yahoo.com P.04