Christianson, C.B. and Bationo, A. and Henao, J. and Vlek, P.L.G. (1990) Fate and efficiency of N fertilizers applied to pearl millet in Niger. Plant and Soil, 125 (2). pp. 221-231.
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Abstract
Field studies were conducted in Niger using 15N-labeled fertilizers to assess the fate and efficiency of fertilizer N in pearl millet (Pennisetum glaucum [L.] R.Br.) production. Total plant uptake of fertilizer N was low in all cases (20%–37%), and losses were severe (25%–53%). The majority of N remaining in the soil was found in the 0- to 15-cm layer though some enrichment at lower depths was found when the N fertilizer was calcium ammonium nitrate (CAN). In a comparison of urea placement methods (band, broadcast, or point placement), no significant differences in 15N uptake or yield were noted though point placement did exacerbate 15N loss. The mechanism of N loss is believed to have been ammonia volatilization. Yields were similar whether urea or CAN was used, but 15N uptake from CAN was higher. A statistical model was developed relating millet yield and N response to midseason rainfall. In drought years, no N response was found, whereas in years of good rainfall a response was found of 15 kg grain for each kilogram of N applied (at 30 kg N ha-1 rate).
| Item Type: | Article |
|---|---|
| Additional Information: | This work was conducted in close collaboration with personnel from the Sahelian Center of the International Center for the Research in the Semi-Arid Tropics (ICRISAT). |
| Uncontrolled Keywords: | calcium ammonium nitrate (CAN), 15N, urea, West Africa |
| Author Affiliation: | Agro-Economic and Africa Divisions, International Fertilizer Development Center (IFDC), 35662, Muscle Shoals, AL, USA |
| Subjects: | Crop Improvement Plant Physiology and Biochemistry > Biochemistry |
| Divisions: | Millet |
| Depositing User: | Mr Balakrishna Garadasu |
| Date Deposited: | 29 May 2013 08:00 |
| Last Modified: | 29 May 2013 08:00 |
| Official URL: | http://dx.doi.org/10.1007/BF00010660 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/10649 |
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