Phosphorus placement an acid arenosols of the West African Sahel
| dc.date.accessioned | 2007-04-25T11:13:25Z | |
| dc.date.available | 2007-04-25T11:13:25Z | |
| dc.date.issued | 2003 | |
| dc.identifier.issn | 0014-4797 | |
| dc.identifier.issn | 1469-4441 | |
| dc.identifier.uri | urn:nbn:de:hebis:34-2007042517836 | |
| dc.identifier.uri | http://hdl.handle.net/123456789/2007042517836 | |
| dc.format.extent | 212206 bytes | |
| dc.format.mimetype | application/pdf | |
| dc.language.iso | eng | |
| dc.rights | Urheberrechtlich geschützt | |
| dc.rights.uri | https://rightsstatements.org/page/InC/1.0/ | |
| dc.subject.ddc | 630 | |
| dc.title | Phosphorus placement an acid arenosols of the West African Sahel | eng |
| dc.type | Aufsatz | |
| dcterms.abstract | Phosphorus (P) deficiency is a major constraint to pearl millet (Pennisetum glaucum L.) growth on acid sandy soils of the West African Sahel. To develop cost-effective fertilization strategies for cash poor farmers, experiments with pearl millet were conducted in southwestern Niger. Treatments comprised single superphosphate hill-placed at rates of 1, 3, 5 or 7 kg P ha^−1 factorially combined with broadcast P at a rate of 13 kg ha^−1. Nitrogen was applied as calcium ammonium nitrate at rates of 30 and 45 kg ha^−1. At low soil moisture, placement of single superphosphate in immediate proximity to the seed reduced seedling emergence. Despite these negative effects on germination, P placement resulted in much faster growth of millet seedlings than did broadcast P. With P application, potassium nutrition of millet was improved and seedling nitrogen uptake increased two- to three-fold, indicating that nitrogen was not limiting early millet growth. Averaged over the 1995 and 1996 cropping seasons, placed applications of 3, 5 and 7 kg P ha^−1 led to 72%, 81% and 88% respectively, of the grain yield produced by broadcasting 13 kg P ha^−1. Nitrogen application did not show major effects on grain yield unless P requirements were met. A simple economic analysis revealed that the profitability of P application, defined as additional income per unit of fertilizer, was highest for P placement at 3 and 5 kg ha^−1. | eng |
| dcterms.accessRights | open access | |
| dcterms.bibliographicCitation | In: Experimental Agriculture. Cambridge : Univ. Press. 39.2003, S. 307-325 | |
| dcterms.creator | Muehlig-Versen, B. | |
| dcterms.creator | Bürkert, Andreas | |
| dcterms.creator | Bationo, André | |
| dcterms.creator | Roemheld, V. |
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