Rice yield and economic response to micronutrient application in Tanzania

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cg.authorship.typesCGIAR and advanced research instituteen
cg.contributor.affiliationAfrica Rice Centeren
cg.contributor.affiliationUniversity of Greenwichen
cg.contributor.affiliationConnecticut Agricultural Experiment Stationen
cg.contributor.affiliationInternational Institute of Tropical Agricultureen
cg.contributor.affiliationInternational Fertilizer Development Centeren
cg.contributor.crpRice
cg.contributor.donorAfrican Development Banken
cg.contributor.donorDeutsche Gesellschaft für Internationale Zusammenarbeiten
cg.coverage.countryTanzania
cg.coverage.iso3166-alpha2TZ
cg.coverage.regionAfrica
cg.coverage.regionEastern Africa
cg.coverage.regionSouthern Africa
cg.howPublishedFormally Publisheden
cg.identifier.doihttps://doi.org/10.1016/j.fcr.2021.108201en
cg.isijournalISI Journalen
cg.issn0378-4290en
cg.journalField Crops Researchen
cg.reviewStatusPeer Reviewen
cg.volume270en
dc.contributor.authorSenthilkumar, Kalimuthuen
dc.contributor.authorSillo, F.S.en
dc.contributor.authorRodenburg, J.en
dc.contributor.authorDimkpa, C.en
dc.contributor.authorSaito, Kazukien
dc.contributor.authorDieng, I.en
dc.contributor.authorBindraban, Prem S.en
dc.date.accessioned2021-09-07T10:21:07Zen
dc.date.available2021-09-07T10:21:07Zen
dc.identifier.urihttps://hdl.handle.net/10568/114896
dc.titleRice yield and economic response to micronutrient application in Tanzaniaen
dcterms.abstractNutrient deficiencies limit rice production in sub-Saharan Africa. The conventional recommended remedy for this is the soil application of fertilizers composed of the macro-nutrients, N, P and K, whereas crop micronutrient requirements are neglected. This leads to nutrient mining and diminished fertiliser use efficiency. Application of micronutrients along with recommended NPK fertiliser rates can prevent nutrient mining and boost rice yields. In this study, we assessed the productivity and profitability of different soil- and foliar-applied micronutrients in 30 on-farm trials per year for two consecutive years (2015, 2016) in Tanzania, East Africa. Five locally available foliar formulations (combinations of macro- and micronutrients or micronutrients alone) and soil application of micronutrients (3−2−7.5−10 Zn-B-Mg-S kg ha–1) were assessed under two NPK-fertilization regimes (80−17.5−33.2 and 0−0−0 kg N-P-K ha–1) in three rice growing environments (RGEs): Irrigated Lowland (IL), Rainfed Lowland (RL), and Rainfed Upland (RU). The effect of foliar and soil applied micronutrients on yield was consistent in IL but was highly variable in the RL and RU conditions across years. The soil application of micronutrients in the absence of NPK was ineffective in any of the RGEs. In IL, without NPK, foliar application alone increased yield by 0.3−0.4 t ha–1, compared to control (3.1 t ha–1). Only NPK application increased yield by 1 t ha–1, while NPK and micronutrients application increased yield by 1.5 t ha–1, compared to control. The benefit-cost (B:C) ratio for NPK with soil applied micronutrients was 4–4.5 compared to NPK application alone. In RL, application of NPK alone increased yield in 2015 from 2.7 to 5.0 t ha–1 while NPK and soil applied micronutrients application increased yield to 6.8 t ha–1. However, a drought incidence in 2016 nullified this effect. With NPK, two foliar products (F2 and F3) increased yield significantly by 1 t ha–1. The highest B:C ratio was obtained with soil applied micronutrients (B:C of 14), and two of the foliar products obtained a B:C ratio of 7 and 7.2, respectively. In RU, no significant yield differences were observed among treatments in any year, likely due to drought. Foliar application was effective only under drought-free conditions across the rice growing environments. This study demonstrated that soil applied micronutrients together with NPK significantly increased yields in IL and RL in the absence of drought-stress. Application of macronutrients is a likely prerequisite for maximizing the benefits of applying micronutrients to increase rice yields in Tanzania.en
dcterms.accessRightsLimited Access
dcterms.audienceScientistsen
dcterms.bibliographicCitationSenthilkumar K., Sillo F.S., Rodenburg J., Dimkpa C., Saito K., Dieng I., Bindraban P. S.Rice yield and economic response to micronutrient application in Tanzania.Field Crops Research.2021, Volume 270, 108201.en
dcterms.extent108201en
dcterms.issued2021-08
dcterms.languageen
dcterms.licenseCopyrighted; all rights reserved
dcterms.publisherElsevieren
dcterms.subjectupland riceen
dcterms.subjectriceen
dcterms.subjectresearchen
dcterms.typeJournal Article

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