Irrigation scheduling effects on yield and phosphorus uptake of cowpea
Identifieur interne : 004F34 ( Main/Exploration ); précédent : 004F33; suivant : 004F35Irrigation scheduling effects on yield and phosphorus uptake of cowpea
Auteurs : M. N. Tyem [Nigeria] ; S. T. Chieng [Canada]Source :
- Agricultural Water Management [ 0378-3774 ] ; 1985.
Abstract
A line-source sprinkler irrigation system was used for irrigation-fertilizer cowpea (Vigna unguiculata [L.] Walp.) production studies. The relative merits and demerits of irrigating frequently but with smaller amounts of water than the design water application depth as compared to stage-of-growth and normal interval irrigation were investigated with five levels of fertilizer P, three water levels and five irrigation schedules. Dry matter production on the basis of forage produced was used as the yield indicator. The plants were harvested when the more advanced individuals reached the late boot stage immediately preceding the appearance of their inflorescences. P uptake was also measured. Statistical analyses of yield and P uptake gave a positive response of the crop to added fertilizer and irrigation water. Application of 70 kg/ha P2O5 produced the highest yields under all irrigation schedules. Irrigating too frequently was found to be detrimental; maximum yield under P fertilization was obtained with irrigations scheduled at half the design interval and with half the design irrigation depth. Uptake of P increased with yield.
Url:
DOI: 10.1016/0378-3774(85)90023-X
Affiliations:
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