Pesquisa agropecuária: uma análise histórica da produção científica da Epagri

Vianna, Luiz Fernando de Novaes

doi:10.5965/223811712132022315

Cited by 2 publications

(2 citation statements)

References 19 publications

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“…In the 1970s and 1980s, research and technological developments in rural areas were focused on productivist models that emerged from the "green miracle" (genetic research, development and massive use of chemical fertilizers and pesticides, and a focus on increasing productivity). Currently, the new paradigm seeks to maintain the productive capacity of food for a still growing population, but with greater integration with ecosystems and natural dynamics (agroecology, agroforestry systems, organic agriculture, and direct sowing) [89].…”

Section: Discussionmentioning

confidence: 99%

Predictive Scenarios of LULC Changes Supporting Public Policies: The Case of Chapecó River Ecological Corridor, Santa Catarina/Brazil

Souza

Morgado

Costa

et al. 2023

Land

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The studies of spatial-temporal land use and land cover (LULC) change patterns, supported by future scenarios and simulation methods based on the assumption of natural socio-economic and territorial driving forces, allow us to go beyond an accurate diagnosis of the dynamics that have occurred so far, providing a picture of possible alternative futures, and are fundamental in assisting with the planning and policy-making in the territory. In this paper, we use LULC maps and explanatory variables aggregated in five dimensions (physical/natural, economic, sociocultural, technological, and demographic) to identify which are the main drinving forces in the evolution process and the simulation of LULC dynamics for 2036, using as a case study the Chapecó River ecological corridor (Chapecó EC) area. The Chapecó EC was created by the state government in 2010 with the goal of combining nature conservation with local and regional development. In this region, in the last two decades, the loss of areas of natural grassland and forest was on average five times higher than the average recorded in the state. Based on scenario-building methods using artificial neural networks, six predictive scenarios were elaborated, based on three socioeconomic scenarios (current conditions, growth, and socioeconomic recession) and two territorial intervention options (actions). This includes an action based on maintaining the current LULC, and another action of a conservationist nature with the recovery of forest and natural grassland areas to the proportions of areas found in 1990. The results indicate that if the current LULC is maintained, forest, pasture and agriculture areas tend to increase, while silviculture and natural grassland areas decrease, driven by economic and physical/natural driving forces. If there is a conservationist action, natural grassland and pasture areas tend to increase and silviculture and agriculture tend to lose area due to economic, technological, and physical/natural driving forces. These trends have revealed that the natural grassland preservation/restoration, the encouragement of conservationist agricultural practices combined with economic strategies, and the technological development of the rural sector seem to form the basis of economic development combined with biodiversity conservation.

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Section: Discussionmentioning

confidence: 99%

Predictive Scenarios of LULC Changes Supporting Public Policies: The Case of Chapecó River Ecological Corridor, Santa Catarina/Brazil

Souza

Morgado

Costa

et al. 2023

Land

Self Cite

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“…Nevertheless, I argue that within the current socio-economic conditions, silvopastures and multistrata agroforestry systems can be considered (relatively) low-hanging fruits for farmers to achieve improved ecological performance. From a technological point of view, the tools to transition to integrated crop-livestock-forestry systems are available and actively promoted by Brazilian state funded agencies such as Embrapa (Gori Maia et al, 2021) or extension services such as Epagri (Vianna, 2022). For multistrata agroforestry systems, labour demand was in most cases lower than in corresponding monocultures (Chapter 5), making these systems attractive alternatives for small-to medium sized fruit producing farms with labour shortages.…”

Section: Outlook: Relevance For Farmersmentioning

confidence: 99%

On the complexity of agroforestry systems

Steinfeld

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Tropical soils are prone to rapid degradation if not managed well, and agroforestry systems have the potential to restore degraded soils and support agricultural production together with other ecosystem services. In Brazil, an increasing number of pioneering farmers are establishing agroforestry systems on previously cleared farmland. However, while there are a wide range of agroforestry systems, this diversity has hardly been quantified, and it is not clear how these systems differ in their capacity for nutrient cycling to reverse soil degradation. The objectives of the study were to assess innovative agroforestry systems in terms of taxonomic and functional diversity, spatial structure and management, and to assess how these systems differ in terms of structural complexity and their potential for nutrient cycling. We assessed a LiDAR-derived stand structural complexity index (SSCI), interrow spacing, stem density, tree species richness and diversity, community weighted means (CWM) of foliar nitrogen and wood density, livestock density, pruning and mowing regimes in 30 agroforestry systems in the state of São Paulo, Brazil. We used N, P, K, Ca and Mg stocks in litter as a proxy for nutrient cycling. The agroforestry systems could be broadly categorized into silvopastures, multistrata and successional agroforestry systems. These types spanned a gradient of structural complexity, and this complexity was positively associated with tree species richness and planting density. Litter nutrient stocks were positively associated with pruning and mulching, and negatively associated with CWM of wood density, indicating the importance of pioneer trees. Overall, our results suggest that densely planted, pruned agroforestry systems that contain high species richness, including pioneer trees, contain relatively high amounts of N, P, K, Ca and Mg in their litter. These findings provide insight in the key characteristics of agroforestry systems to support nutrient cycling, and can inform the design of agroforestry systems for the regeneration of degraded agricultural land.

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Pesquisa agropecuária: uma análise histórica da produção científica da Epagri

Cited by 2 publications

References 19 publications

Predictive Scenarios of LULC Changes Supporting Public Policies: The Case of Chapecó River Ecological Corridor, Santa Catarina/Brazil

Predictive Scenarios of LULC Changes Supporting Public Policies: The Case of Chapecó River Ecological Corridor, Santa Catarina/Brazil

On the complexity of agroforestry systems

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