Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 541246
Title Assessment of Opportunities for Burundian Small-Scale Potato Farmers to Increase Productivity and Income
Author(s) Bararyenya, Astère; Nahayo, Pierre Claver; Nduwimana, Anicet; Niyonzima, Pierre; Nyawakira, Déo; Sindihebura, Jean Pierre; Vyizigiro, Ernest; Ndayishimiye, Vital; Haverkort, Anton J.
Source Potato Research 61 (2018)1. - ISSN 0014-3065 - p. 73 - 88.
DOI https://doi.org/10.1007/s11540-018-9359-2
Department(s) PPO/PRI AGRO Toegepaste Plantenecologie
Publication type Refereed Article in a scientific journal
Publication year 2018
Keyword(s) Acceptable minimum rate of return - Chemical fertilisers - Diffused light store - Fungicides - Healthy seed tubers - Marginal rate of return - New potato varieties - On-farm trials
Abstract

From 2014 through 2016, on-farm experiments were carried out in three provinces surrounding Bujumbura town in Burundi to improve the low potato (Solanum tuberosum) yields, which currently stand at about 6 t ha−1. It was hypothesised that in rain-fed conditions, improved varieties, healthier seed tubers, pre-sprouting in light, proper fertilisation and protection from late blight attack would improve yield and quality, such as tuber weight, tuber size and lower brown rot incidence. The treatments in the on-farm trials at five farms in each of three sites (15 replicates) were applied in two seasons, giving 30 replicates in 580 plots. The following treatments were compared with growers’ current practices: introduction of two new varieties, use of early generation seed from a rapid multiplication scheme, earlier harvesting of a seed crop, seed storage in a diffused light store, and research-based timing and dose rate of fertilisers and fungicides. Marginal rates of return on investments were calculated at farm level and current and tested alternative technologies were compared. Costs and benefits of applying such techniques were calculated. An improved variety contributed up to 20% yield increase and healthier seed 80%. Early harvesting reduced yield by 30% and reduced incidence of brown rot in the current season, but increased it (from 21 to 39%) in the following season when tubers were replanted. Diffused light storage, alternating contact and systemic fungicide application, and application of chemical fertilisers resulted in 30, 50 and 60% yield increases, respectively. It was shown that it is possible to double yields and economic returns (marginal rates of return) under the growing conditions in Burundi when growers plant healthy pre-sprouted seed of a new variety and apply chemical fertilisers and fungicides.

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