Tropical Plant Research

Tropical Plant Research

An International Journal by Society for Tropical Plant Research

ISSN (E): 2349-1183 ISSN (P): 2349-9265
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2023, VOLUME 10 ISSUE 2Pages: 60-70

Seasonal variation of phosphorus forms in soil amended with poultry manure in two agro-ecological zones of Nigeria

G. M. Akande*, A. J. Adeyemo, B. S. Ewulo and B. F. Dada
*Department of Soil and Environmental Management, Kogi State University Anyingba, Nigeria
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Abstract:
Seasonal variation of phosphorus forms in response to poultry manure was conducted at two agro-ecological zones of Nigeria. The experimental design was a factorial experiment arranged in a Randomized Completed Block Design (RCBD) comprised of Factors A (Locations; (Rainforest and Southern Guinea Savanna), Factors B (Sampling seasons; (onset of rainy season, peak of rainy season, cessation of raining season, onset of dry season and peak of dry season) and Factors C (Poultry manure rates; (0 ton ha-1, 10 ton ha-1 and 15 ton ha-1) making 30 treatment combinations, with three replication per treatment. Initial samples were collected at 0–15 cm for soil properties determination before poultry manure application. Manure nutrient content and soil properties were determined using standard laboratory method. Poultry manure was incorporated into the soil before the onset of rainfall after preparation of the experimental layout. Samples were collected at 0–15 cm at experimental sites during sampling seasons for determination of Inorganic P and total P using standard laboratory method while organic P was calculated as difference between total and inorganic P. From this study, poultry manurerates, locations and sampling seasons have significant effects on soil phosphorus forms in which application of 15 ton ha-1 of poultry manure released higher TP, OP and IP with strong seasonal variations which were maximum at the peak of the rainy season during the sampling seasons at the two locations. We would conclude that soil phosphorus forms would highly depend on the rate of organic manure, environmental factors and metrological differences in the locations. However, additional studies are needed to further investigate seasonal variation of soil phosphorus forms in response to other types of organic manure and inorganic fertilizer in different soil types by quantifying their synergistic and antagonistic effects.
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