THE CRUDE PROTEIN AND MINERAL COMPOSITION OF SOME TROPICAL GRASSES IN TRINIDAD

One hundred and six grasses grown in plots 204m x 1.2m at the University Field Station, Valsayn, Trinidad were cut twice at six weeks of regrowth, in the rainy season. They were analysed for crude protein (CP), Ca, P, Mg, K, Na'; Cu, Fe, Mn and Zn content. The ranges of CP, Ca, P, Mg, K and Na (g kg-1 dry matter OM) were 58·141, 2.8 . 12.6, 1·3,0.7-4.4, 1.1-6.4 and 0·16-6.90, respectively, and for Cu, Fe, Mn and Zn (rng kg· 1 OM) were 2.2-11.9, 90-1473,63-983 and II-59, respectively. The percentages of grasses having concentrations of CP, Ca, P, Mg, K and Na below (g kg-10M). 100, 3,2,2,5 and 1 were 68.9, 0.9, 71.7,41.5,88.7 and 41.5, respectively, and the corresponding values of Cu, Fe, Mn and Zn below (mg kg-1 DM) 10, 100, 100 and 30 were 98.1, 0.9, 1.9 and 52.8, respectively. The results are discussed in the light of the requirements of grazing beef and dairy cattle, sheep and goats. ----- Se cultivd ciento seis tipos de hierba en semilleros de 2,4m x 1,2m en la Estaci6n Experimental Universitaria en Valsayn, Trinidad y se las corte dos veces a unas seis semanas del nuevo crechniento durante la estacion lluviosa, Se las analizd para determinar su contenido de proteinas crudas (CP), Ca, P, Mg, K, Na, Cu, F, Mn y Zn. Los valores de CP, Ca, P, Mg, K y Na (g/kg de OM - materia seca) eran de 58 - 141; 2,8 - 12,6; 1 ·3;0,7 - 4,0; 1, I - 6,4 y 0,16 6,90 respectivamente. Los de Cu, Fe, Mn y Zn (mg/kg OM) eran de 2,2 - 11,9; 90 - 1473; 92 - 983 y 11 - 59, respectivamente. Los porcentajes de hierbas con concentraciones de CP, Ca, P, Mg, K y Na inferiores a 100, 3, 3, 2, 8 y I (g/kg OM) eran de 68,9; 0,9; 41,5; 34,9; 100 y 41,5 respectivamente. Los valores de CII, Fe, Mn, y Zn inferiores a 10, 100, 40, y 50 (mg/kg OM) eran de 98,1; 0,9; 0,0 y 99,1 respectivamente. Se exam ina los resultados, teniendo en cuenta los requistos para el apacentamiento de gando vacuno, tano de engorde como lechero, asf como de ovejas y cabras.


Issue Date:
Sep 08 1985
Publication Type:
Conference Paper/ Presentation
Language:
English
Total Pages:
9




 Record created 2017-08-04, last modified 2017-08-29

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