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Articles by O.E. Asiribo
Total Records ( 2 ) for O.E. Asiribo
  M. Orunmuyi , O.O. Oni , I.A. Adeyinka and O.E. Asiribo
  A study was conducted to determine the relationship between Plasma Alkaline Phosphatase (PAP) activity and reproductive traits in two strains of Rhode Island chickens. Mean enzyme activity in the cocks was 133.07 I.U for strain A and 134.78 I.U for strain B. Values of percentage fertile (PCF), percentage hatch (PCH) and percentage hatchability (PCHBLT) were 80.47, 45.68 and 53.41 in strain A, corresponding values in strain B were 85.94, 51.79 and 56.67. Heritability estimate was high for PAP in both strains (0.57) but low to moderate values were obtained for reproductive traits except percent fertility in strain A (0.56). Genetic correlations between PAP and PCF, PCH and PCHBLT were high and negative in strain A but low and positive values except PCHBLT were obtained in strain B. Phenotypic correlations between PAP and PCF, PCH and PCHBLT were generally low in magnitude but follow the direction of genetic correlations. The enzyme activity can be useful in the selection of the cocks for improved fertility and or hatchability of fertile eggs.
  C.K. Daudu , E. Uyovbisere , E. Iwuafor and O.E. Asiribo
  Organic materials are important resources that could be used more efficiently in crop production. Improving the utilization efficiency of organic materials requires improved decomposition estimates, which could stem from a better understanding of decomposition patterns of different organic manures. Four organic amendments were studied for their decomposition patterns under field conditions of the Nigerian Guinea Savanna between 1998 and 2000. Mass loss from the organic materials, was found to increase in the following order, L. leucocephala prunnings> M. pruriens vines > maize stover > cow dung. The plant residues decomposed more rapidly, losing more than 50% of their dry weight within 28 days. Decomposition of cow dung occurred more slowly reaching 50% after about six weeks. A two pool, first order, three parameter negative exponential model was adequate to describe dry matter loss for the organic materials. The relative rate of decomposition for the labile pool (kL) were 0.33, 0.30, 0.55 and 0.52 g day- 1 for cow dung, maize stover, M. pruriens vines and L. leucocephala, respectively. At zero inorganic fertilizer application, average dry matter loss for three years was 51, 49, 35 and 30% for L. leucocephala, M. pruriens, cow dung and maize stover, respectively. The results indicated that organic materials biomass could be separated into two pools, each of which responds differently to varying levels of inorganic fertilizer.
 
 
 
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