Yield performance of potato (Solanum tuberosum L) under integrated use of blended NPS fertilizer and vermicompost in Horroguduru area, Western Ethiopia

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Abstract Potato is a high-yielding potential crop grown for its high nutritional value but constrained with low soil fertility. This study was conducted at Gitilo site, western Ethiopia during 2019 year with the aim to analyze the impact of vermicompost and blended NPS fertilizer rates on potato yield associated traits. The treatments consisted of four rates of NPS fertilizers (0, 150, 200, and 250 kg NPS ha− 1) and four rates of vermicompost (0, 4, 6, and 8 tha− 1) in 4x4 factorial which becomes laid out in randomized complete block design with 3 replications. The result revealed significant influence of NPS fertilizers and vermicompost on all parameters measured indicating a high response of potato to the treatments. The application of blended NPS fertilizer integrated with vermicompost resulted superior to the application of either NPS fertilizer or vermicompost alone. The combined application of 8tha− 1 vermicompost with 250 kg ha− 1 blended NPS fertilizer resulted in maximum value for most of the yield parameters including marketable tuber yield (27.4 tha− 1) and total tuber yield (27.9 tha− 1).. The result suggests the application of 250 kg ha− 1 blended NPS with 8 t ha− 1 vermicompost is profitable with a net benefits of about 2761USD with a 315.9% marginal rate of return. Since at increasing levels of treatment resulted an increasing yield trend, further study is required to identify the optimum rate of recommendation of both fertilizers.

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