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Potassium and magnesium fertilizers on banana in Uganda: yields, weevil damage, foliar nutrient status, and DRIS analysis

dc.contributor.authorSmithson, P.C.
dc.contributor.authorMcIntyre, B.D.
dc.contributor.authorGold, C.S.
dc.contributor.authorSsali, H.
dc.contributor.authorNight, G.
dc.contributor.authorOkech, S.
dc.date.accessioned2019-12-04T11:36:25Z
dc.date.available2019-12-04T11:36:25Z
dc.date.issued2004
dc.identifier.citationSmithson, P.C., McIntyre, B.D., Gold, C.S., Ssali, H., Night, G. & Okech, S. (2004). Potassium and magnesium fertilizers on banana in Uganda: yields, weevil damage, foliar nutrient status and DRIS analysis. Nutrient Cycling in Agroecosystems, 69(1), 43-49.
dc.identifier.issn1385-1314
dc.identifier.urihttps://hdl.handle.net/20.500.12478/6238
dc.description.abstractLow soil fertility and pest pressure are two causes of the decline in banana (Musa AAA) production in central Uganda. Foliar analysis by the Diagnosis and Recommendation Integrated System (DRIS) pinpoints K and Mg as the most limiting nutrients. This study tested the effects of K and Mg additions on plant performance and weevil damage for 2.75 yr, at Buligwe in central Uganda and Muyogo in southwest Uganda. All treatments received 25 kg P ha–1 and 100 kg N ha–1 annually, while K and Mg were applied (kg ha–1) at 0 K–0 Mg, 100 K–0 Mg, 100 K–25 Mg and 100 K–50 Mg. Fresh fruit yields (Mg ha–1 yr–1) ranged from 3.2 to 5.0 at Buligwe and 14.4 to 18.9 at Muyogo, with similar treatment trends at both sites. The 100 K–0 Mg treatment produced higher yields than no-K control (p = 0.022 for the combined dataset). Yields with K+Mg tended to be lower than with K only, though not significantly different. Foliar nutrient concentrations were little affected by treatments, but varied substantially among sample dates. With increasing cumulative rainfall between foliar samplings, foliar P declined (p = 0.077), K declined (ns), and Ca and Mg increased (p = 0.02 to 0.03). Weevil damage was higher at Buligwe, but was little affected by K and Mg treatments at either site.
dc.language.isoen
dc.subjectBananas
dc.subjectCurculionidae
dc.subjectFertilizers
dc.subjectMagnesium
dc.subjectMusa
dc.subjectPotassium
dc.titlePotassium and magnesium fertilizers on banana in Uganda: yields, weevil damage, foliar nutrient status, and DRIS analysis
dc.typeJournal Article
cg.contributor.affiliationInternational Centre for Research in Agroforestry
cg.contributor.affiliationThe Rockefeller Foundation
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationKawanda Agricultural Research Institute, Uganda
cg.coverage.regionAfrica
cg.coverage.regionEast Africa
cg.coverage.countryUganda
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectBanana
cg.iitasubjectPlant Diseases
cg.iitasubjectDisease Control
cg.iitasubjectPlant Health
cg.iitasubjectPests Of Plants
cg.accessibilitystatusLimited Access
cg.reviewstatusPeer Review
local.dspaceid107520
cg.identifier.doihttps://doi.org/10.1023/B:FRES.0000025294.96933.78


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