Evaluación de 11 híbridos de caña de azúcar (Saccharum spp.) en la región central de Veracruz, México

Objective: The objective of this study was to select new hybrids of sugarcane (Saccharum spp.) adapted to the area supplyof the Central Progreso sugar mill located in Paso del Macho, Veracruz, Mexico.Design/methodology/approach: A group of 11 new hybrids were established in the agroindustrial phase, in ordercompare their adaptation and field and industrial performance using the commercial hybrids Mex 69-290 and CP 72-2086 as controls.Results: The results obtained indicated that during the plant cycle and under local soil conditions, the ColMex 98-100hybrid showed the highest field yield (144.34 t ha?1) and the higher value for the theoretical sugar per hectare (20.26 t),even though it had the lowest values of percentage of sucrose (Pol) (14.64). Regarding the percentage of sucrose, thehighest records were obtained by the ColMex 95-27 (16.97), ColMex 05-627 (16.29), and ColMex 05-47 (16.27) hybrids,with values above the commercial control CP 72-2086 (16.11).Limitations on study/implications: An important limitation for the investigation was the abundance of stones in the topsoil.Findings/conclusions: It can be concluded that after analyzing the agricultural and industrial performance that, the besthybrids were: ColMex 98-100, ColMex 05-47, ColMex 05-627, and CP 71-1038, surpassing the commercial controlsObjetivo: El objetivo de este estudio fue seleccionar nuevos híbridos de caña de azúcar (Saccharum spp.) adaptados al área de abasto del Ingenio Central Progreso localizado en Paso del Macho, Veracruz,México.Diseño/metodología/aproximación: Se estableció en fase agroindustrial un grupo de 11 nuevos híbridos, los cuales fueron comparados por su adaptación y rendimiento de campo e industrial con los híbridos comerciales Mex 69-290 y CP 72-2086.Resultados: Los resultados obtenidos indicaron que durante el ciclo planta y bajo las condiciones edafoclimáticas del lugar, el hibrido ColMex 98-100 resultó ser el mejor en rendimiento de campo (144.34 t ha?1) y mayor valor en azúcar teórica por hectárea (20.26 t), aun teniendo los valores más bajos en porcentaje de sacarosa (Pol) (14.64%). En cuanto a la variable % de sacarosa, los mayores porcentajes lo obtuvieron los híbridos ColMex 95-27 (16.97%), ColMex 05-627 (16.29%) y ColMex 05- 47 (16.27%), con valores por encima del testigo comercial CP 72-2086 (16.11%).Limitaciones del estudio/implicaciones: Una limitación importante para la investigación fue la abundancia de piedras sobre la capa arable del suelo.Hallazgos/conclusiones: Se puede concluir que después de analizar el comportamiento agrícola e industrial, los mejores híbridos fueron: ColMex 98-100, ColMex 05-47, ColMex 05-627 y CP 71-1038,superando a los testigos comerciales

Characterisation of microbial attack on archaeological bone

As part of an EU funded project to investigate the factors influencing bone preservation in the archaeological record, more than 250 bones from 41 archaeological sites in five countries spanning four climatic regions were studied for diagenetic alteration. Sites were selected to cover a range of environmental conditions and archaeological contexts. Microscopic and physical (mercury intrusion porosimetry) analyses of these bones revealed that the majority (68%) had suffered microbial attack. Furthermore, significant differences were found between animal and human bone in both the state of preservation and the type of microbial attack present. These differences in preservation might result from differences in early taphonomy of the bones. © 2003 Elsevier Science Ltd. All rights reserved