Showing results for: Grazing and grassland
An academic debate on the controversial possibility of decreasing greenhouse gas emissions via increased beef production in the Brazilian Cerrado finds a new set of commentators, who have responded to an original paper by de Oliveira Silva et al. earlier in 2016 in the same journal, Nature Climate Change.
Recent assessments have strongly suggested that meeting the widely agreed target of limiting global warming to less than 2°C will require the deployment of substantial carbon sinks in addition to measures to curb greenhouse gas (GHG) emissions. This perspective article examines the latest research and thinking on the ability of agricultural soil management to reduce GHG emissions and promote soils as carbon sinks, and the practical feasibility of implementing available soil management practices
In a 2013 TED talk entitled ‘How to fight desertification and reverse climate change’ the Zimbabwean ecologist, Allan Savory, claimed that the ‘holistic management’ grazing management method that he has developed and promoted over 40 years, could stop global desertification and reduce atmospheric carbon dioxide to preindustrial levels, within a few decades.
This review article provides a summary of the multiple environmental and societal costs and benefits of livestock production. Homing in on climate change, it reviews the range of GHG mitigation options that have been proposed both on the supply side (actions that potentially reduce emissions per unit of production, or absolute emissions, considering both changes in practice and in policy) and those on the demand side (e.g. reductions in meat consumption, waste reduction).
As methane produced by ruminants is a potent greenhouse gas (GHG), many researchers and organisations have pointed to the necessity of reducing ruminant stocks around the world. In this study, the authors argue that with the right crop and grazing management, ruminants might not only reduce overall GHG emissions, but could, in fact, facilitate increases in soil carbon, and reduce environmental damage related to current cropping practices.
These two studies discuss afforestation projects in relation to 1) land availability and sheep farming in Scotland, and 2) the biodiversity losses that may be associated with such projects.
Future demand for food and for land is set to grow. A key question is therefore: how can we most productively use land for food, in order balance the multiple competing demands for the ecosystem services it provides? One way this has been investigated previously is by looking at crop yields and how to increase them. Another way, focussing instead on the consumption side, has looked at the metric of dietary land footprint.
According to this UK study there is a potential for improving soil carbon assessments if inventories increasingly assess soils below the current common level of 30 cm. The researchers estimate that over double the amount of carbon is stored in all UK grassland soils when looking at a depth of 1 metre compared to estimates where only the top 30 cm of soil is considered.
This report by Friends of the Earth discusses how ecological resources essential for producing food can be protected and how we can feed a growing population by focusing on creating a more sustainable, democratic and fair food system for all.
Taking as their starting point a hypothetical zero-deforestation for agricultural production, where people would refrain from clearing any further forests for agricultural purposes, the researchers behind this study look at both supply side and demand side measures to assess how changes in production and diet can assist in halting deforestation
This new paper published in Nature Climate Change, assesses the mitigation potentials achievable through improved livestock management practices and moderating meat consumption. It estimates that livestock-oriented measures could account for up to half of the mitigation potential of the global agricultural, forestry and land-use sectors but emphasises that the gap between technical potential and social and economic feasibility is likely to be large.
In this study, researchers from the Netherlands and Italy investigate the long-term (past and future) changes in phosphorus (P) budgets in grasslands used for grazing and in connection with croplands. The authors recognise a lack in the literature of studies characterising the P cycle in relation to grasslands and croplands, and - as grass-dependent livestock demand is increasing – they seek to address this lack of understanding.
Two recent systematic literature reviews conclude that both organic milk and meat contain around 50% more beneficial omega-3 fatty acids than conventionally produced products. The team led by Newcastle University, reviewed 196 papers on milk and 67 papers on meat and found clear differences between organic and conventional milk and meat, especially in terms of fatty acid composition, and the concentrations of certain essential minerals and antioxidants.