A influência do espaçamento sôbre o ciclo vegetativo do sisalResumo
The present paper deals with the influence of different rates of spacing on the poling of sisal plants (Agave sisalana Perrine). The results were obtained from spacing trials (four randomized blocks of nine treatments) carried out at the Ribeirão Preto and Pindorama Experimental Stations. The percentages of poling plants, up to the 5th leaf cutting, were 20,0% and 91,7% for the narrowest (1,2 x 2,0 m) and widest (2,0 x 3,0 m) spacings tried in Pindorama, while in Ribeirão Preto they were 12,5% and 02,5%, respectivelly. According to these results it may be concluded that the narrow spaced plants were less liable to early poling than the wide spacing ones. The trial at Ribeirão Preto also indicated that among the plants, grown under the same conditions, those producing leaves at a faster rate were the first to pole. At that Station, the yearly average lenf production per plant (for all treatments) up to the 4th leaf cutting, has been 41,5 leaves for those plants poling after 63 months ; 38,0 leaves for those poling after 74 months ; and 35,3 leaves for those plants not poled up to 5 th cutting.
A influência do espaçamento sôbre o ciclo vegetativo do sisal
J. C. Medina
SUMMARY
The present paper deals with the influence of different rates of spacing on the poling of sisal plants (Agave sisalana Perrine).
The results were obtained from spacing trials (four randomized blocks of nine treatments) carried out at the Ribeirão Preto and Pindorama Experimental Stations.
The percentages of poling plants, up to the 5th leaf cutting, were 20,0% and 91,7% for the narrowest (1,2 x 2,0 m) and widest (2,0 x 3,0 m) spacings tried in Pindorama, while in Ribeirão Preto they were 12,5% and 02,5%, respectivelly.
According to these results it may be concluded that the narrow spaced plants were less liable to early poling than the wide spacing ones.
The trial at Ribeirão Preto also indicated that among the plants, grown under the same conditions, those producing leaves at a faster rate were the first to pole. At that Station, the yearly average lenf production per plant (for all treatments) up to the 4th leaf cutting, has been 41,5 leaves for those plants poling after 63 months ; 38,0 leaves for those poling after 74 months ; and 35,3 leaves for those plants not poled up to 5 th cutting.
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LITERATURA CITADA
Referências bibliográficas
- 1. Baun, K. Bemerkungen zur Verbesserung der Sisalagave (lurch Züchtung. Zeits-chr. für Pflanzezüch. 8: 278-290, 1922.
- 2. Anônimo. East African Agricultural Research Station. Amani. Annual Report 1938.
- 3. D'Utra, G. Cultura do sisal on henequen. Bol. Secret. Agr. Ind. e Com. Est. S. Paulo. Série 10: 165-196. 1910.
- 4. Glover, J. The root-svstem of Agave sisalana in certain East African Soils. Empire Jour. Exp. Agriculture, 7: 11-20. 1939.
- 5. Hunter, H. e H. M. Leake Em Recent Advances in Agricultural Plant Breeding, J. & A. Churchill. London, 1933.
- 6. Lock, G. W. A Study of methods os cultivating sisal in Kenya in comparison with those used in Tanganivka. The East African Agric. Journal, 2: 392-396. 1937.
- 7. Nutman, E. J. The field for sisal research in East Africa. Bulletin Imperial Institute 29: 299-307. 1931.
- 8. Toro, A. P. El mejoramiento del henequen por métodos científicos. El Sisal de Yucatan, p. 20-23, 26, 1944.
Datas de Publicação
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Publicação nesta coleção
15 Jun 2010 -
Data do Fascículo
1946
