| Revista: | Tropical and subtropical agroecosystems |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000266861 |
| ISSN: | 1870-0462 |
| Autors: | Lanyasunya, T.P1 Wang, Hong Rong Kariuki, S.T2 Kuria, D.M Chek, A.L3 Mukisira, E.A |
| Institucions: | 1Yangzhou University, College of Animal Sciences, Yangzhou. China 2Egerton University, Department of Botany, Njoro. Kenia 3National Agriculture Research Laboratories, Nairobi. Kenia |
| Any: | 2007 |
| Període: | Abr |
| Volum: | 7 |
| Número: | 1 |
| Paginació: | 53-58 |
| País: | México |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Analítico, descriptivo |
| Resumen en español | El estudio se realizó en Naivasha, Kenya por 15 semanas para evaluar el efecto de la madurez sobre el contenido mineral de Vicia villosa Roth. Después de preparar el área, 60 parcelas de 2 x 2 m2 fueron delimitados y asignados a 5 bloques in un diseño de bloques al azar. En cada parcela se sembraon 10 g de semilla en 5 hileras de 2 m con una separación de 30 cm. Se cosechó a las 6, 8, 10, 12 7 14 semanas post emergencia, cortando a una altura de 5 cm. La mayoría de los elementos analizados no fueron influenciados por la edad de V. villosa. P, Na y Mg permanecieron constants con una concentración promedio al final del studio de 36.8, 160.4 y 17 g.kg-1 DM respectivamente. Mn y Zn siguieron un patron similar. El K sin embargo se incrementó de 29.4 en la semana 6 a 42.1 g.kg-1 DM en la semana 14. Cu incrementó marginalmente de 7.67 a 8.01 mg.kg-1 DM. Los cambios en la concentración de Ca no siguieron un patron definido. En relación a las necesidades de los rumiantes, V. villosa tiene un aporte adecuado de macro elementos. Los niveles de micro elementos son menores a los deseables para dietas de rumiantes. Se concluyó que no hubo un efecto de la edad de V. villosa sobre la concentración de la mayoría de sus minerales |
| Resumen en inglés | This study was conducted in Naivasha, Kenya over a period of 15 weeks to determine the effect of maturity on mineral content in hairy vetch (Vicia villosa Roth). Immediately after field preparation, 60 plots 2 x 2 sq. m size were demarcated and allotted to 5 similar blocks of 12 plots each in a randomized complete block design. Each plot received 10 g of seed evenly drilled to 5 rows (2 m length and 30 cm apart). All the plots were planted on the same day and kept weed free throughout the study. They were harvested at 6, 8, 10, 12 and 14 weeks after seed emergence in sequential manner beginning with block 1 to 5, each time leaving a stubble height of 5 cm. Levels of most elements examined were not strongly influenced by advancing maturity of V. villosa. P, Na and Mg levels remained fairly constant with advancing maturity of the legume. Their overall means at the end of the study were 36.8, 160.4 and 17 g kg-1 DM respectively. Concentration levels of Mn and Zn also followed the same pattern over the study period. Levels of K however increased sharply from 29.4 at 6 to 42.1 g kg-1 DM at 14 weeks. Copper levels increased marginally (4.4%) from 7.67 at 6 to 8.01 mg kg-1 DM at 14 weeks. The changes in Ca levels with age of the legume were inconsistent. This inconsistency was also reflected in the determined Ca:P ratios. This study has shown that, relative to ruminant mineral requirements, V. villosa has adequate macro-elements. The levels of trace elements however, fell below the desired limits for ruminants. It was concluded that, advancing age of V. villosa did not have significant effect on tissue concentration of most essential minerals |
| Disciplines | Biología |
| Paraules clau: | Angiospermas, Fisiología vegetal, Plantas forrajeras, Madurez, Contenido mineral, Vicia villosa |
| Keyword: | Biology, Angiosperms, Plant physiology, Forage plants, Maturity, Mineral content, Vicia villosa |
| Text complet: | Texto completo (Ver PDF) |
