Nutrient removal with harvest of biomass of Eucalyptus dunnii maiden grown in short rotation coppice for bioenergy.
The continue increase in world population, coupled with the environmental problems caused by the use of fossil fuels, has led to the search of new sources of renewable energy. Among these, is the use of eucalyptus biomass grown on short rotation coppice for energy production, in which all the components of the tree are harvested. Based on this, some questions arise:Can we call renewable energy the one in which all the components of the tree are removed from the soil every four year? What are the consequences from the nutrient cycling point of view?
Herramienta i) Gestión predial integral (GPI).
La herramienta de Gestión Predial Integral (GPI) es un sistema de registros -con base anual- de información del predio, en formato de planilla electrónica. Se trabajó con el concepto de plantilla para uniformizar ingreso de información y salida de resultados para análisis del sistema, como apoyo al trabajo de técnicos facilitadores junto con productores foco. Asimismo, permite sistematizar y agrupar información relevante para la descripción y planificación de recursos del predio.
Differences in growth between Corriedale sheep divergent lines for resistance to nematodes.
The association between genetic resistance of lambs to gastrointestinal parasites (GIP) with dry matter intake (DMI) average daily gain (ADG) and residual feed intake (RFI) was studied. Sixty-four Corriedale lambs (357±14 days old), from divergent lines for resistance to GIP (27 resistant-R and 37 susceptible-S) developed by the Uruguayan Wool Secretariat were used. The animals were allotted to one of five outdoor pens, they were stratified by sex, body weight, and sire.
Evaluation of udder morphology and milk production in prolific and meat ewes.
Currently in Uruguay, several experiments of crossbreeding and synthetic breeds are being developed with the inclusion of East Friesian (EF), Finnsheep (F) and Texel (T) meat breeds. The milk production and udder morphology of 57 ewes (8 F, 24 EF and 25 T breeds) from three flocks were evaluated. A total of 161 records (24 F, 68 EF and 69 T breeds) were collected in three test-day controls with average days in milk (DIM) 21, 40 and 60. The ewes were randomly assigned to four experimental groups and separated from the lambs during 4 hours in a good pasture.