Efecto de la escarificación química en la calidad de semilla de Centrosema spp. durante el almacenamiento
One of the most important forage legumes for acid and unfertile tropical soils is Centrosema spp. This genus is characterized by extremely hard seeds. Even with optimum conditions, because of its hard seeds, much does not germinate naturally. With this in mind, three species were selected, C. acutif...
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| Format: | Journal Article |
| Language: | Español |
| Published: |
1990
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/44286 |
| _version_ | 1855530778342981632 |
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| author | Burbano Orjuela, Edgar Alfredo |
| author_browse | Burbano Orjuela, Edgar Alfredo |
| author_facet | Burbano Orjuela, Edgar Alfredo |
| author_sort | Burbano Orjuela, Edgar Alfredo |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | One of the most important forage legumes for acid and unfertile tropical soils is Centrosema spp. This genus is characterized by extremely hard seeds. Even with optimum conditions, because of its hard seeds, much does not germinate naturally. With this in mind, three species were selected, C. acutifolium, C. macrocarpum and C. brasilianum to evaluate the effect of chemical scarification on germination and emergence. Also, germination and emergence for these three entries were evaluated after having been stored for nineteen months at 18°C and 50 % relative humidity. Seed counts with and without scarification and the associated interaction with the defined treatments. The results indicated germination was lowered more with Centrosema acutifolium than the others when the described treatments were assessed (germination lowered by 40% after five months of storage). The other two species have harder seed which reflects the limited loss In germination observed (maximum of 10%). The emergence results from field trials were substantially different from germination data obtained in the laboratory (approximately 50%). These results indicate that seed stored under the two treatments for forage species such as Centrosema spp. Did not improve hardening significantly. The controlled conditions favored physiological qualities (germination) while maintaining hardness which was the case for C. macrocarpum. AWN scarified seed should not be stored under non controlled conditions as was noted for C. acutifolium which lost hardness rapidly and lacks defense mechanisms to avoid deterioration while stored. If scarification is employed a few days prior to seeding, adequate storage conditions should be employed. |
| format | Journal Article |
| id | CGSpace44286 |
| institution | CGIAR Consortium |
| language | Español |
| publishDate | 1990 |
| publishDateRange | 1990 |
| publishDateSort | 1990 |
| record_format | dspace |
| spelling | CGSpace442862025-05-15T09:40:26Z Efecto de la escarificación química en la calidad de semilla de Centrosema spp. durante el almacenamiento Burbano Orjuela, Edgar Alfredo feed crops centrosema seed storage seed quality scarification germination almacenamiento de semillas semillas calidad escarificación germinación One of the most important forage legumes for acid and unfertile tropical soils is Centrosema spp. This genus is characterized by extremely hard seeds. Even with optimum conditions, because of its hard seeds, much does not germinate naturally. With this in mind, three species were selected, C. acutifolium, C. macrocarpum and C. brasilianum to evaluate the effect of chemical scarification on germination and emergence. Also, germination and emergence for these three entries were evaluated after having been stored for nineteen months at 18°C and 50 % relative humidity. Seed counts with and without scarification and the associated interaction with the defined treatments. The results indicated germination was lowered more with Centrosema acutifolium than the others when the described treatments were assessed (germination lowered by 40% after five months of storage). The other two species have harder seed which reflects the limited loss In germination observed (maximum of 10%). The emergence results from field trials were substantially different from germination data obtained in the laboratory (approximately 50%). These results indicate that seed stored under the two treatments for forage species such as Centrosema spp. Did not improve hardening significantly. The controlled conditions favored physiological qualities (germination) while maintaining hardness which was the case for C. macrocarpum. AWN scarified seed should not be stored under non controlled conditions as was noted for C. acutifolium which lost hardness rapidly and lacks defense mechanisms to avoid deterioration while stored. If scarification is employed a few days prior to seeding, adequate storage conditions should be employed. Centrosema spp. es uno de los géneros más importantes dentro de las accesiones de leguminosas forrajeras en el área de impacto de suelos ácidos e infértiles del trópico. En estos materiales se presenta un alto porcentaje de semillas duras, que aún al proporcionar las condiciones óptimas para que germine no lo hace naturalmente. Con tal fin se seleccionaron tres especies: C. acutifolium, C. macrocarpum y C. brasilianum, para evaluar el efecto de la escarificación química en la germinación y emergencia en el campo y 19 meses de almacenamiento, bajo condiciones controladas (18°C y 50% H.R.) y al ambiente; comparar el comportamiento de la semilla sin y con escarificación y analizar la interacción de especies por tratamiento. Los resultados mostraron que C. acutifolium fue la especie que perdió más rápidamente la germinación en los diferentes tratamientos (40% a los cinco meses de almacenada). Las otras dos especies presentan mayor dureza, lo cual permite que la caída de la germinación no sea tan acentuada (10% máximo de pérdida). Los resultados de emergencia en el campo fueron diferentes a los valores de germinación en el laboratorio (aproximadamente un 50%). Los resultados permiten concluir que semillas almacenadas bajo los dos tipos de almacenamiento para forrajeras como Centrosema no superan su dureza significativamente. Las condiciones controladas favorecen la calidad fisiológica (germinación), manteniendo la dureza como en el caso de C. macrocarpum. De igual forma no se debe guardar semilla escarificada bajo condiciones no controladas, como en el caso de C. acutifolium que al perder rápidamente su dureza no presenta mecanismos de defensa para evitar el deterioro durante el almacenamiento. Si se pretende escarificar unos días antes de la siembra, se necesita tener condiciones de almacenamiento adecuadas. 1990 2014-10-02T08:33:32Z 2014-10-02T08:33:32Z Journal Article https://hdl.handle.net/10568/44286 es Open Access |
| spellingShingle | feed crops centrosema seed storage seed quality scarification germination almacenamiento de semillas semillas calidad escarificación germinación Burbano Orjuela, Edgar Alfredo Efecto de la escarificación química en la calidad de semilla de Centrosema spp. durante el almacenamiento |
| title | Efecto de la escarificación química en la calidad de semilla de Centrosema spp. durante el almacenamiento |
| title_full | Efecto de la escarificación química en la calidad de semilla de Centrosema spp. durante el almacenamiento |
| title_fullStr | Efecto de la escarificación química en la calidad de semilla de Centrosema spp. durante el almacenamiento |
| title_full_unstemmed | Efecto de la escarificación química en la calidad de semilla de Centrosema spp. durante el almacenamiento |
| title_short | Efecto de la escarificación química en la calidad de semilla de Centrosema spp. durante el almacenamiento |
| title_sort | efecto de la escarificacion quimica en la calidad de semilla de centrosema spp durante el almacenamiento |
| topic | feed crops centrosema seed storage seed quality scarification germination almacenamiento de semillas semillas calidad escarificación germinación |
| url | https://hdl.handle.net/10568/44286 |
| work_keys_str_mv | AT burbanoorjuelaedgaralfredo efectodelaescarificacionquimicaenlacalidaddesemilladecentrosemasppduranteelalmacenamiento |