© Global Journal Of Agricultural Sciences . 2006. Vol. 5 No. 1
Publisher: Bachudo Science Co. Ltd
Influence of N- Fertilizer Application and Cutting Interval On The Chemical Composition of Northern Gamba, Guinea and Star Grasses
KEYWORDS: Nitrogen fertilizer, Chemical Composition of three grass species
ABSTRACT:Three experiments were carried out in 1985, 1986 and 1987 to estimate the influence of N-fertilizer application and cutting intervals on the chemical composition of Northern gamba, Guinea and Star grasses. The investigation showed that increasing delay in date af harvest progressively decreased the chemical composition of herbage. The chemical composit!On studied included: Nitrogen (N), Phosphorus (P), Potassium (K), Calcium (Ca) and Magnesium (mg).Harvesting frequencies and N fertilizer application exerted significant (P = 0.05) effect on the nutritive value of swards such that cutting every 3 weeks where 450KgN/ha was applied significantly gave the highest N content of 3.32%, on the average compared with other treatments. Increasing intervals between harvest significantly (P = 0.05) decreased the N. P, K, Ca and Mg contents of herbage except in Star grass where K rather increased with increase in cutting intervals. The high N, K. Ca and Mg content of herbage investigated, followed closely, high levels of applied N, while P content significantly decreased for every addition of 150KgN/ha. Seasonal effect, showed that high quality herbage was reduced by delaying cutting and low level of N. Species differences in quality as influenced by cutting intervals and N-levels were noted. The implications of these findings ate discussed.
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