BRS Pampa: cultivar de arroz irrigado de alta produtividade e excelência na qualidade de grãos.

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Desenvolvimento de cultivares de arroz irrigado subtropical do programa de melhoramento genético da Embrapa: ensaios de VCU no RS, safras 2010/11 a 2013/14.

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BRS A701 CL: nova cultivar de arroz irrigado para o sistema Clearfield no Rio Grande do Sul.

A Embrapa apresenta seu novo lançamento comercial, a BRS A701 CL, fonte de tolerância aos herbicidas do grupo das imidazolinonas, sendo considerada de segunda geração. A BRS A701CL foi desenvolvida utilizando gene que confere resistência a herbicidas da classe das imidazolinonas, identificado na própria espécie Oryza sativa L., não havendo necessidade de ?importação? de genes de outras espécies para a composição do genoma da nova cultivar. Os testes de campo foram iniciados em 2010/11 e, em 27/10/2015 o Ministério da Agricultura, Pecuária e Abastecimento (MAPA) concedeu o registro nº 34460 para cultivo no Rio Grande do Sul

Linking land-use and land-cover transitions to their ecological impact in the Amazon.

Human activities pose a major threat to tropical forest biodiversity and ecosystem serv-ices. Although the impacts of deforestation are well studied, multiple land-use andland-cover transitions (LULCTs) occur in tropical landscapes, and we do not knowhow LULCTs differ in their rates or impacts on key ecosystem components. Here, wequantified the impacts of 18 LULCTs on three ecosystem components (biodiversity,carbon, and soil), based on 18 variables collected from 310 sites in the BrazilianAmazon. Across all LULCTs, biodiversity was the most affected ecosystem component,followed by carbon stocks, but the magnitude of change differed widely amongLULCTs and individual variables. Forest clearance for pasture was the most prevalentand high-impact transition, but we also identified other LULCTs with high impact butlower prevalence (e.g., forest to agriculture). Our study demonstrates the importanceof considering multiple ecosystem components and LULCTs to understand the conse-quences of human activities in tropical landscape

A social and ecological assessment of tropical land uses at multiple scales: the Sustainable amazon network

Science has a critical role to play in guiding more sustainable development trajectories. Here, we present the Sustainable Amazon Network (Rede Amazônia Sustentável, RAS): a multidisciplinary research initiative involving more than 30 partner organizations working to assess both social and ecological dimensions of land-use sustainability in eastern Brazilian Amazonia. The research approach adopted by RAS offers three advantages for addressing land-use sustainability problems: (i) the collection of synchronized and co-located ecological and socioeconomic data across broad gradients of past and present human use; (ii) a nested sampling design to aid comparison of ecological and socioeconomic conditions associated with different land uses across local, landscape and regional scales; and (iii) a strong engagement with a wide variety of actors and non-research institutions. Here, we elaborate on these key features, and identify the ways in which RAS can help in highlighting those problems in most urgent need of attention, and in guiding improvements in land-use sustainability in Amazonia and elsewhere in the tropics. We also discuss some of the practical lessons, limitations and realities faced during the development of the RAS initiative so far