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Ammonium fertilization increases pearl millet yield by promoting early root growth, higher tillering, and water use during grain filling in a low P Sahelian soil

dc.date.accessioned2021-03-18T09:40:30Z
dc.date.available2021-03-18T09:40:30Z
dc.date.issued2020-12-01
dc.identifierdoi:10.17170/kobra-202102193323
dc.identifier.urihttp://hdl.handle.net/123456789/12648
dc.description.sponsorshipGefördert im Rahmen des Projekts DEALger
dc.language.isoengeng
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectammonium versus nitrate fertilizationeng
dc.subjectpearl milleteng
dc.subjectroot lengtheng
dc.subjectRhizo Tubeseng
dc.subjectWest Africaeng
dc.subject.ddc570
dc.subject.ddc580
dc.titleAmmonium fertilization increases pearl millet yield by promoting early root growth, higher tillering, and water use during grain filling in a low P Sahelian soileng
dc.typeAufsatz
dcterms.abstractBackground: Adaptation of pearl millet [Pennisetum glaucum (L.) R. Br.] to low soil phosphorus (P) at early seedling stages and efficient P fertilizer application are crucial for its survival in the West African Sahel. While addition of NH+4-N to P in the microdose technique has been reported to stimulate early growth of pearl millet, there is little information regarding root length (RL) at different timings. Aims: Our study aimed at assessing the effects of added NH+4-N and NO−3-Nto P on (1) pearl millet agronomic traits such as root and shoot growth and (2) the water use dynamics during the cropping cycle. Methods: Twenty‐four “RhizoTubes” filled with P‐deficient soil were used to grow pearl millet under three treatments: (T1) placed P addition alone at 0.4 g per seed hole, Pplaced, (T2) Pplaced + NH+4-N, and (T3) Pplaced + NO−3-N. At 2, 3, 4, and 5 weeks after sowing (WAS) we took non‐destructive measurements of RL. Water use (transpiration) was measured from 3.5 to 9 WAS. Results: At early growth, roots in the topsoil of T2 were longer than T3 and T1 roots (at 4 WAS: 129.3 cm for T2, 87.5 cm for T3, and 93.3 cm for T1, p < 0.05). Total RL at 2 WAS correlated positively with seedling height and final grain yield. Fertilization with NH+4-N reduced the time to flowering and increased the number of tillers and grain yield, whereas addition of NO−3-N increased vegetative dry matter at harvest and water use efficiency. Conclusions: Our findings suggest that fertilization with NH+4-N plays a critical root stimulating role at early growth stages, seemingly by increasing lateral root initiation, which carries through to a larger water use during grain filling and higher grain yield.eng
dcterms.accessRightsopen access
dcterms.creatorBeggi, Francesca
dcterms.creatorVadez, Vincent
dcterms.creatorBürkert, Andreas
dc.relation.doidoi:10.1002/jpln.202000347
dc.subject.swdWestafrikager
dc.subject.swdDüngungger
dc.subject.swdAmmoniumverbindungenger
dc.subject.swdNitrationger
dc.subject.swdPerlhirseger
dc.subject.swdWurzelger
dc.subject.swdWassernutzungger
dc.type.versionpublishedVersion
dcterms.source.identifierEISSN 1522-2624
dcterms.source.issueIssue 1
dcterms.source.journalJournal of Plant Nutrition and Soil Science (JPNSS)eng
dcterms.source.pageinfo123-131
dcterms.source.volumeVolume 184
kup.iskupfalse


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