Observations on the White Fulani(Bunaji) Zebu cattle of northern Nigeria in a southern Nigeria environment VI.The relationship between feed intake and animal production of lactating cows at Ibadan.
1976
Olanloku,E. A., Department of Animal Science, University of Ibadan, Nigeria | Oyenuga,V. A., Department of Animal Science, University of Ibadan, Nigeria
The investigations were based on Amazon shade and manurial experiment conducted at the Cocoa Research Institute, Tafo, Ghana, between 1965 and 1972. Black pod incidence was consistently and significantly higher on plots with medium (Sl) or dense (S2) overhead shade than on plots without shade (So); differences between S2 and Sl were not significant. Under the same shade regime, disease fluctuated from year to year, this being associated with variable weather, particularly the distribution of rainfall. Direct fertilizer effects were variable; they were generally small but sometimes significant. The number of black pods was higher on plots receiving fertilizers than on control plots and this may be attributed to the higher yields following fertilizer application. Disease on plots receiving NP or PK fertilizers was higher than on control plots, but infection on plots with NK was lower than on the control plots. The N x P x K interaction significantly increased disease incidence in 1965/66 and 1966/67 minor crops (April-August) but reduced incidence in the main crops (September-March). Black pod disease on plots eceiving the three elements were sometimes lower than on plots receiving any two. None of the shade x fertilizer interactions except the shade x N x P x K interaction, significantly increased disease. The four-factor interaction effects were significant only in 1965/66, 1966/67 and 1967/68. It is suggested that reports on the incidence of black pod disease should include both percentage and the corresponding yield so that the number of pods diseased can be appreciated.
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