Agroforestry Systems最新文献

Against the backdrop of changing production conditions and market requirements, it seems time has come to rethink Brazil’s beef production systems. We analyse the economic and environmental performance of three beef production systems: classic beef production system (CB), and two types of silvopastoral systems: the integrated crop-livestock-forestry system (ICLFS) and the natural regeneration system (NR) in a comparative case study analysis. We find that, though costs of production are the lowest for CB, only the ICLFS and NR case studies are generating long-term profits. While greenhouse gas emissions per kg live weight added are lowest in ICLFS, followed by NR and CB, per hectare (ha) emissions are highest in NR, followed by ICLFS and CB. Considering the system’s carbon removal, NR and potentially ICLFS are sequestering more than releasing. Additionally, the land required to produce beef is lowest in NR, followed by ICLFS and CB. Considering the additional outputs produced by ICLFS and NR, they showcase the potential of multifunctional production systems for future scenarios, where land scarcity puts land-demanding production systems, such as beef, under pressure. The three production systems perform differently depending on the indicators analysed. How they will reply to future challenges depends on the location and the specific environment. Yet, from the analysed systems, CB is the least sustainable, economically and environmentally.

Agroforestry practices play a vital role in improving rural income and livelihoods, yet quantifying their contributions in Ethiopia remains limited. This study investigated the contribution of agroforestry practices to rural income and livelihoods, along with factors influencing income derived from these practices. A two-stage sampling method was employed to select 160 rural households engaged in home garden and woodlot agroforestry practices. Data were collected through semi-structured questionnaires, key informant interviews, and focus group discussions. Descriptive statistics, content analysis, generalized linear model, Mann–Whitney U test, and financial analysis tools were used to analyze and interpret the data. The results demonstrated that agroforestry practices provide numerous benefits to rural households, including fuelwood, charcoal, poles, construction materials, fodder, perennial crops, food crops, and fruits for both consumption and income generation. Agroforestry practices significantly increased farm income, contributing 18.2% of the total household income. This income significantly supported annual household expenditures across various livelihood capitals. Income from woodlots was significantly higher than that from home gardens, while home gardens showed a better overall capability to improve livelihoods. Household size, agroforestry size, gender, crop income, access to seedlings, and farm elevation positively and significantly (p < 0.05) impacted agroforestry income. Overall, agroforestry practices significantly contribute to annual income and improve the human, social, natural, physical, and financial capital of rural households in the Tarmaber district. Policymakers and practitioners should consider the socioeconomic, ecological, and institutional factors influencing agroforestry income when developing policies and strategies to improve rural income and livelihoods.

Silvopastoral systems are widely used for ecological vegetation restoration in fragile areas. As the main landform of western Henan, the low hilly areas are experiencing water and soil loss because of human activities. However, the effect of silvopastoral systems on soil nutrients in low hilly areas has not been well studied. To address this issue, we established a silvopastoral experiment in the low hilly area of western Henan province in 2011, where four plots of pure forest of poplar (Populus simonii, PS), oriental thuja (Platycladus orientalis, PO), Chinese cork oak (Quercus variabilis, QV) and false acacia (Robinia pseudoacacia, RP) was planted on a natural wasteland; perennial alfalfa (Medicago sativa, MS) was intercropped with these pure forest plots as silvopastoral treatments, i.e., PS-MS, PO-MS, QV-MS and RP-MS; one plot of natural wasteland as CK. In 2018, 2019 and 2020, we examined the soil total carbon (TC) and total nitrogen (TN) of different vegetation restorations. Results showed that the silvopastoral treatments (PO-MS, QV-MS and RP-MS) generally increased the TC and TN (by ~ 53% and ~ 51% in 2018, ~ 66% and ~ 49% in 2019, and ~ 66% and ~ 67% in 2020, respectively) compared to the pure forest treatments, and were also higher than the M and PS-MS. The change in relative TC and TN between downslope and upslope positions is higher in PS and PO, lower in RP compared to the PS-MS and PO-MS, RP-MS respectively, and non-different between QV and QV-MS. In summary, soil nutrient properties are generally higher but vary among the slope positions in the silvopastoral treatments compared to pure forest treatments in the low hilly area.

Nutrient management in coffee-based agroforestry systems plays a critical role in soil nitrogen (N) cycling, but has not been well documented. The objective of this study was to evaluate the effect of coffee canopy management and fertilization on soil N dynamics. This study used a randomized complete block design (2 × 3 × 2) with four replications. There were three factors: 1) coffee canopy management (T1: Pruned, T2: Unpruned), 2) fertilizer type (O: Organic, I: Inorganic; M: 50% Organic + 50% Inorganic), and 3) fertilizer dose (D1: low, D2: medium, D3: high). Soil N dynamic indicators (i.e., total N, ammonium (NH₄⁺), nitrate (NO₃⁻), net N-NH₄⁺, net N-NO₃⁻, soil microbial biomass N) were measured at two soil sampling depths (0–20 cm and 20–40 cm). Results showed that pruning increased soil total N and microbial biomass N (MBN) by 10–56% relative to unpruned coffee trees. In contrast, the unpruned coffee canopy had 15–345% higher NH₄⁺, NO₃⁻, net N-NH₄⁺, net N-NO₃⁻, and microbial biomass N concentration than pruned coffee. Mixed fertilizer application increased NO₃⁻ and net N-NH₄⁺ accumulation by 5–15% relative to inorganic and organic fertilizers. In addition, medium to high dose fertilization led to a 19–86% higher net N-NO₃⁻ concentration and microbial biomass N as compared to low dose fertilization. The treatment of no pruning and mixed fertilizer at low to medium doses was the optimal management strategy to maintain soil available N, while pruning combined with organic fertilizer has the potential to improve soil total N and MBN.

In West Africa, and Benin particularly, local forest resources can potentially contribute to both increasing and stabilizing soil productivity. However, these resources continue to be neglected with efforts instead concentrated on promoting exotic species. This study aimed to prioritize local agroforestry species on agricultural landscape by investigating the gendered, socio-demographic and agro-pedological factors of local knowledge and use of agroforestry species amongst small-holder farmers in Benin. An agroforestry inventory combined with an ethno-agroforestry survey was conducted on 364 farms with 364 farmers. A cluster analysis based on farmers' socio-demographic and agroecological factors was used to cluster farmers into two homogeneous agroforestry systems. Median score, species diversity and ecological networks were established for these two systems. Results illustrate that gendered difference exist between the priority that farmers give to multi-purpose species and this prioritization depends on priority ecosystem services for farmers and gender. Therefore, it would be useful first to consider gender and specific needs of each category of farmer to optimize the choice of agroforestry species to be promoted in such systems. The successful introduction of identified species through extension programs requires more advanced research related to the real contribution of these species to farmland fertilization, as well as the nutrient transmission pathways to associated crops in an agroforestry system to address simultaneously specific ecological, economic and socio-cultural sustainability criteria, as well as improved crop production.

The use of unconventional feedstuffs aims to incorporate alternative dietary options to contribute to the sustainability of livestock systems. The purpose of this study was to investigate the impact of incorporating Tithonia diversifolia (TD) into sugarcane (SC) silage on nutritional quality and ruminal fermentation in an in vitro gas production assay. The underlying hypothesis was that the increased protein content in silage with the addition of TD may result in a reduction in total gas production, including methane, due to potential modifications in the substrate fermentation profile. Treatments were formulated based on the inclusion of TD in SC silage, on a dry matter basis, as follows: TC: 100% SC; T25 = 75% SC + 25% TD; T50 = 50% SC + 50% TD; T75 = 25% SC + 75% TD. For the preparation of silages, forage samples were collected, subjected to pre-drying for approximately 24 h, then chopped, mixed according to each proposed treatment, and packed into mini silos (± 2 kg each) with increasing levels of TD. The silos were opened after 30 days, and samples were collected for chemical composition analysis and in vitro gas production assay. Silages with the addition of TD showed higher levels of crude protein and neutral detergent fiber compared to pure sugarcane silage. The addition of TD reduced total gas and methane production. The inclusion of Tithonia diversifolia in sugarcane silage demonstrated potential to enhance the nutritional quality of feed for ruminant production systems.