Acacia Plantation Development and the Configuration of Tree Farmers' Agricultural Assets and Land Management—A Survey in Central Vietnam

Since 1990 acacia-based tree plantations have fast expanded in Vietnam, now supporting a multi-billion-dollar export-oriented wood industry which is transforming from woodchip production to value-added products. Within this dynamic context, tree farmer associations have started to produce sawlogs under FSC (Forest Stewardship Council) certification. In this paper, we retrace the development of plantation assets, investigating farmers’ current livelihoods and land management, specifically considering various aspects of sustainability. We interviewed 180 tree farmers in three districts (lowland–upland regions) of Thừa Thiên Huế Province, including sawlog producers with and without FSC and smallholder producers of woodchips. Acacia planting in ‘barren lands’ was initiated through state programs in the 1990s (low-/midlands) and 2010s (uplands). Farmers now producing FSC sawlogs were among the first to gain forestland tenure; they now own large plantations (on good terrain), are in tune with policies and maintain resources/capacities to adopt management in line with FSC standards. Yet, most farmers also retain plots for easy-to-manage and low-risk woodchip production. Soil/vegetation conservation depends on farmers’ status/capacities and environmental awareness; FSC membership added economic-political benefits. Findings are discussed within a regional historic context. Plantations contribute to economic development, but issues persist/emerged in terms of land equity and environmental governance, risks (e.g., plant pathogens), and spaces/impetus for farm-based innovation and adaptiveness

The acacia plantation boom in Thừa Thiên Huế Province, Central Vietnam: A survey of tree farmers' shifting livelihoods, environmental perceptions, and occupational perspectives

The rise of exotic-species-based plantation forestry in biodiverse tropical countries transforms livelihoods and environmental qualities in various ways. Through 180 structured interviews of different types of acacia plantation owners (producers of woodchips/sawlogs, with/without membership in a recent Forest Stewardship Council [FSC] program) we investigated such transformations in three districts along a lowland-upland gradient in Thừa Thiˆen Huế Province, Central Vietnam. We focused on how trajectories of livelihood and income changes related to the farmers’ perceptions on environmental changes, and how this, in turn, was linked to the farmers’ assessments of opportunities, risks, and concrete plans in tree cultivations. Sawlog producers (especially with FSC-certification) in the lowlands had been among the first to plant acacias in the 1990s, and in 2018 usually owned large plantations. In contrast, most farmers producing just woodchips were smallholders. Before acacias the farmers’ livelihoods were often more diversified in terms of agricultural products. Since then, many farmers (especially in the lowlands) abandoned rice/cassava production and/or livestock keeping to concentrate on wood production, willingly and/or as an outcome of land conversion (enclosure) to privatised plantations. Farmers’ incomes and material assets usually increased (especially FSC-farmers), but most smallholders still depended on incomes from subsidiary wage labor. Within a context of ‘development’ improvements were also seen in infrastructure (buildings, roads, water provisioning) and public services (education, health). Considering acacia planting most farmers (especially FSC-farmers in the lowlands) saw environmental improvements in terms of soil fertility and landscape amenity, but not wildlife habitat. Most farmers also saw plantation value (especially on longer rotations) in terms of natural hazards mitigation (i.e. floods, droughts, soil erosion), but storms were also noted as the main risk to plantations (especially in the uplands). Another emerging risk was posed by plant diseases affecting acacias in the mid-/lowlands. Projective future plans to change plantation areas and/or crop rotations depended on the farmers’ economic strengths in terms of plantation land or other capital. Regarding future risks most farmers noted environmental impacts (storms, plant diseases) rather than economic factors (with wood market prices considered stable). Overall, the results suggest an appreciable value of acacia plantations to farmers, however with some marked distinctions between richer (FSC-certified) and poorer (smallholder) farmers as well as farmers in different regions with distinct terrain and land use management histories. We discuss such distinctions whilst also noting relevant study limitations connected to the complex socio-politics of land titling and uses, especially in the uplands

Acacia Plantation Development and the Configuration of Tree Farmers’ Agricultural Assets and Land Management—A Survey in Central Vietnam

Since 1990 acacia-based tree plantations have fast expanded in Vietnam, now supporting a multi-billion-dollar export-oriented wood industry which is transforming from woodchip production to value-added products. Within this dynamic context, tree farmer associations have started to produce sawlogs under FSC (Forest Stewardship Council) certification. In this paper, we retrace the development of plantation assets, investigating farmers’ current livelihoods and land management, specifically considering various aspects of sustainability. We interviewed 180 tree farmers in three districts (lowland–upland regions) of Thừa Thiên Huế Province, including sawlog producers with and without FSC and smallholder producers of woodchips. Acacia planting in ‘barren lands’ was initiated through state programs in the 1990s (low-/midlands) and 2010s (uplands). Farmers now producing FSC sawlogs were among the first to gain forestland tenure; they now own large plantations (on good terrain), are in tune with policies and maintain resources/capacities to adopt management in line with FSC standards. Yet, most farmers also retain plots for easy-to-manage and low-risk woodchip production. Soil/vegetation conservation depends on farmers’ status/capacities and environmental awareness; FSC membership added economic-political benefits. Findings are discussed within a regional historic context. Plantations contribute to economic development, but issues persist/emerged in terms of land equity and environmental governance, risks (e.g., plant pathogens), and spaces/impetus for farm-based innovation and adaptiveness

Tree species diversity and utilities in a contracting lowland hillside rainforest fragment in Central Vietnam

Methods In the rainforest remnant tree species and various bio-physical parameters (relating to soils and terrain) were surveyed on forty 20 m × 20 m sized plots. The forest's vegetation patterns and tree diversity were analysed using dendrograms, canonical correspondence analysis, and other statistical tools. Results Forest tree species richness was high (172 in the survey, 94 per hectare), including many endemic species (>16%; some recently described). Vegetation patterns and diversity were largely explained by topography, with colline/sub-montane species present mainly along hillside ridges, and lowland/humid-tropical species predominant on lower slopes. Scarcity of high-value timber species reflected past logging, whereas abundance of light-demanding species, and species valued for fruits, provided evidence of human-aided forest restoration and ‘enrichment’ in terms of useful trees. Exhaustion of sought-after forest products, and decreasing appreciation of non-wood products concurred with further encroachment of exotic plantations in between 2010 and 2015. Regeneration of rare tree species was reduced probably due to forest isolation. Conclusions Despite long-term anthropogenic influences, remnant forests in the lowlands of Vietnam can harbor high plant biodiversity, including many endangered species. Various successive future changes (vanishing species, generalist dominance, and associated forest structural-qualitative changes) are, however, expected to occur in small forest fragments. Lowland forest biodiversity can only be maintained if forest fragments maintain a certain size and/or are connected via corridors to larger forest networks. Preservation of the forests may be fostered using new economic incentive schemes

Uses, toxicity levels, and environmental impacts of synthetic and natural pesticides in rice fields – a survey in Central Thailand

<p>Nowadays, pesticides are used pervasively in Asian rice production areas. Nonetheless, information is scarce regarding chemicals’ application and synergistic toxicity and longer-term impacts on paddy ecosystems. In Phranakhon Si Ayutthaya and Ang Tong (AT) provinces, 40 conventionally and 31 organically managed farms were visited. The farmers provided information on types and levels of pesticides used, and indices describing pesticide ‘toxic exposures’ were calculated. In the dry and wet seasons, the fields were surveyed for soil organic carbon (OC) and nitrogen (N) and rice densities and sizes. Using multivariate statistics, interrelationships among variables were investigated. Overall, 12 types of herbicides (all synthetic), 27 insecticides (13 natural), and 6 molluscicides (1 natural) were recorded. Pesticide exposures differed between provinces; organic farms used more natural products. OC was positively correlated with ‘toxic exposure’ levels, probably resulting from effects of pesticides on carbon-reducing processes. Additionally, molluscicides and herbicides explained OC levels. N varied spatially, probably resulting from flooding regimes; management influences were unnoticeable. In the dry season, rice growth was decreased on fields exposed to plentiful synthetic insecticides, whereas in the wet season, use of herbicides and molluscicides enhanced the growth. Further research is advisable to better establish long-term costs and benefits of different pesticide regimes in rice fields.</p

Additional file 1: of Tree species diversity and utilities in a contracting lowland hillside rainforest fragment in Central Vietnam

Additional figures and tables. (PDF 2324 kb

Additional file 2: of Tree species diversity and utilities in a contracting lowland hillside rainforest fragment in Central Vietnam

Detailed summary of plant species data of the HPC-forest. (PDF 1843 kb