Optimizing water and nitrogen application for neglected horticultural species in tropical sub-humid climate areas: a case of African eggplant (Solanum aethiopicum L.)

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dc.contributor.authorMwinuka, Paul Reuben
dc.contributor.authorMbilinyi, Boniface P
dc.contributor.authorMbungu, Winfred B
dc.contributor.authorMourice, Sixbert K
dc.contributor.authorMahoo, Henry F
dc.contributor.authorSchmitter, Petra
dc.date.accessioned2023-07-21T10:50:49Z
dc.date.available2023-07-21T10:50:49Z
dc.date.issued2021
dc.descriptionJournal Articleen_US
dc.description.abstractAfrican eggplant, a traditional and important nutrient-dense crop to Tanzania’s nutrition and food security. However, yields remain low as a result of sub-optimal irrigation and fertilizer practices. To reduce the yield gap, a randomized split-plot design set up with irrigation as a main and nitrogen (N) treatments as a sub-factor. The irrigation regimes were 100 % (I100), 80 % (I80) and 60 % (I60) of crop water requirements whilst nitrogen levels were 250 kg N/ha (F100), 187 kg N/ha (F75), 125 kg N/ha (F50) and 0 kgN/ha (F0). The study evaluated the effect of irrigation water and N on crop growth variables and yield, fruit quality, WUE and NUE. The study showed the importance of combining different irrigation performance indicators which responds to different levels of water and nitrogen to evaluate and assess suitable irrigation and fertilizer strategies for African eggplant. The crop growth variables (plant height and LAI) had a good correlation with fruit yield (R2 = 0.6 and 0.8). The fruit quality was best performed by 100 % water in combination with 75 % N treatment. The best WUE and NUE was attained at 80 % and 100 % levels of water in combination with 75 % N. However, minimizing trade-offs between the various indicators, the optimal application for African eggplant would likely be around 80 % of the total irrigation requirement and 75 % of the N requirement in sandy clay loam soils under tropical sub humid conditions.en_US
dc.identifier.urihttp://www.suaire.sua.ac.tz/handle/123456789/5433
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.subjectAfrican eggplanten_US
dc.subjectDrip irrigationen_US
dc.subjectYielden_US
dc.subjectFruit qualityen_US
dc.subjectCrop water-use efficiency (WUE)en_US
dc.subjectNitrogen-use efficiency (NUE)en_US
dc.titleOptimizing water and nitrogen application for neglected horticultural species in tropical sub-humid climate areas: a case of African eggplant (Solanum aethiopicum L.)en_US
dc.typeArticleen_US
dc.urlhttps://doi.org/10.1016/j.scienta.2020.109756en_US

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