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Full-Text Articles in Life Sciences
Estimating Nitrogen Fixation By Pastures On A Regional Or Continental Scale, Murray Unkovich
Estimating Nitrogen Fixation By Pastures On A Regional Or Continental Scale, Murray Unkovich
IGC Proceedings (1997-2023)
With fertiliser N inputs dramatically increasing in Australia in recent years (Angus, 2001), regional and continental scale estimates of biological nitrogen fixation (BNF) are now required for assessing the risks of terrestrial and surface water eutrophication, groundwater contamination, and gaseous N emissions.
Productivity Of Grasslands In Wielkopolska In Conditions Of Weather Variables Changes In The Last 34 Years, B. Golińska, M. Czerwiński, P. Goliński
Productivity Of Grasslands In Wielkopolska In Conditions Of Weather Variables Changes In The Last 34 Years, B. Golińska, M. Czerwiński, P. Goliński
IGC Proceedings (1997-2023)
The purpose of this study was the assessment of the effect of climatic changes since 1985 on the productivity of grasslands in Wielkopolska region (Poland). The weather data (precipitation sum, mean, maximum and minimum air temperature, insolation, relative air humidity and wind speed) were collected from 1985 to 2018 at five weather stations located in the region that belong to the Institute of Meteorology and Water Management. Using this data, trends of Standardized Precipitation Evapotranspiration Index (SPEI) were determined. Grassland productivity was estimated from data collected by the Central Statistical Office, that refer to meadow hay production for each commune …
Impact Of Grazing Management On Productivity Of Tropical Grasslands, Moacyr Corsi, Geraldo B. Martha Jr., Domício Do Nascimento Jr., Marco A. A. Balsalobre
Impact Of Grazing Management On Productivity Of Tropical Grasslands, Moacyr Corsi, Geraldo B. Martha Jr., Domício Do Nascimento Jr., Marco A. A. Balsalobre
IGC Proceedings (1997-2023)
Beef and dairy cattle enterprises from tropical pasture-based systems are notoriously of low productivity. The low soil fertility, the exploitation of native grasslands, the low genetic potential of the animals and the poor management of soil, pasture and animal components are all arguments used to explain these “low-productivity systems”. In fact, research has consistently indicated up to 50% increase in calving rate when animals grazing unfertilized pastures were supplemented with trace-mineralized salt (Table 1) but unfortunately less than 90% of Brazilian farmers use this management strategy (Tosi, 1997). However, a recent survey conducted by São Paulo State government showed that …
Impact Of Grazing Management On The Productivity Of Cold Temperate Grasslands Of Southern Patagonia - A Critical Assessment, A. F. Cibils, M. B. Coughenour
Impact Of Grazing Management On The Productivity Of Cold Temperate Grasslands Of Southern Patagonia - A Critical Assessment, A. F. Cibils, M. B. Coughenour
IGC Proceedings (1997-2023)
The contention that productivity of cold temperate grasslands of southern Patagonia have been greatly affected by domestic herbivore grazing in the past is fairly widespread. The consequences of spatiotemporal interactions between grazing and abiotic factors on the overall productivity of such systems, however, are still poorly understood. Predictions of both short- and long-term impacts of grazing management strategies on grassland productivity require a better understanding of these interactions. In this paper we make a critical assessment of the impact of grazing management on long-term sustainability of the grass steppes of southern Patagonia (Argentina). We discuss this issue in the context …
Productivity And Composition Of Two Improved Native Pastures Under Different Grazing Managements In Uruguay, D. F. Risso, E. J. Berretta, G. Carracelas
Productivity And Composition Of Two Improved Native Pastures Under Different Grazing Managements In Uruguay, D. F. Risso, E. J. Berretta, G. Carracelas
IGC Proceedings (1997-2023)
Two improved native pastures were established by phosphoric (P) fertilisation and oversowing of: white clover (Trifolium repens) mixed with birdsfoot trefoil (Lotus corniculatus) (TbL) and annual lotus (Lotus subbiflorus) (Rin). Such pastures were evaluated during 5 years with steers at two stocking rates (High and Low) and two grazing managements (Rotational and Alternate). Presence of legumes was high and botanical changes were favourable in both pastures that evidenced good persistence. Daily liveweight gains of steers and total animal production were high in both pastures, but significantly (P≤ 0.05) higher in TbL. No significant differences …