Vesterager, J.M. and Nielsen, N.E. and Hgh-Jensen, H. (2007) Nitrogen budgets in crop sequences with or without phosphorus-fertilised cowpea in the maize-based cropping systems of semi-arid eastern Africa. African Journal of Agricultural Research, 2 (6). pp. 261-268.
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Abstract
Advantages of cowpea were tested in terms of net N-input by cowpea mono- or intercropped with maize in a crop sequence where sparingly soluble P sources were added to the first year crop. The grain yield of maize grown after cowpea monocrop was doubled and the N uptake increased by 60% compared to maize following maize. The N-value of growing cowpea monocropped prior to maize monocrop was equivalent to the application of 50 kg N ha-1 as mineral fertiliser. When maize followed a maize-cowpea intercrop, grain yield was increased by 67%. Around 34% of the N contained in cowpea residues was recovered in the following maize as estimated by 15N. There was however no benefit on the second season maize of applying sparingly soluble P sources to the first season legume.
| Item Type: | Article |
|---|---|
| Author Affiliation: | Department of Agricultural Sciences, Faculty of Life Sciences, University of Copenhagen, Hjbakkegaard Alle 9, DK-2630 Taastrup, Denmark |
| Subjects: | Plant Protection > Pesticides Plant Protection > Pests |
| Divisions: | Maize |
| Depositing User: | Mr B Krishnamurthy |
| Date Deposited: | 20 Dec 2010 17:50 |
| Last Modified: | 29 Dec 2010 19:42 |
| Official URL: | http://www.academicjournals.org/ajar/PDF/Pdf2007/J... |
| URI: | http://eprints.icrisat.ac.in/id/eprint/1064 |
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