Artigo em periódico indexado (CPATSA) https://www.alice.cnptia.embrapa.br/alice/handle/item/331 2026-07-07T13:11:15Z 2026-07-07T13:11:15Z FIGUEIRÊDO, P. I. de MORAIS, I. M. de V. SILVA FILHO, J. R. V. da AMORIM, J. dos S. NOGUEIRA, D. M. ARAUJO, G. G. L. de VOLTOLINI, T. V. https://www.alice.cnptia.embrapa.br/alice/handle/doc/1187904 2026-06-28T12:38:23Z 2026-01-01T00:00:00Z

Título: Succulent forages sustain lamb performance and hydration without compromising thermoregulation in semi-arid feedlots. Autoria: FIGUEIRÊDO, P. I. de; MORAIS, I. M. de V.; SILVA FILHO, J. R. V. da; AMORIM, J. dos S.; NOGUEIRA, D. M.; ARAUJO, G. G. L. de; VOLTOLINI, T. V. Conteúdo: Forage watermelon (Citrullus lanatus var. citroides) and spineless cactus (Opuntia stricta) are succulent forages with high water content, making them potential food sources for thermoregulation and performance of confined sheep in tropical environment. This study evaluated animal performance, intake and digestibility of dry matter and nutrients, water and nitrogen balances, ingestive behavior, and thermoregulatory responses of sheep fed diets with spineless cactus or forage watermelon as partial replacements for Tifton 85 hay (Cynodon dactylon). The treatments were: 1 – Tifton 85 hay-based diet (HAY); 2 – spineless cactus-based diet (CAC) and 3 – forage watermelon-based diet (FWM). Ten replicates per treatment were used in a completely randomized design. Male, non-castrated sheep of undefined breed, aged three months with initial body weight of 21.20 ± 2.41 kg, were used. Dry matter (DM), total carbohydrate, and neutral detergent fiber intake and digestibility were not influenced by diets. However, FWM resulted in lower crude protein intake and digestibility compared to CAC. Diets with succulent forages reduced free water intake and increased total water ingestion. Nitrogen intake, absorption, and balance were lower for FWM than CAC. Average daily gain, final body weight and feeding efficiency were also not influenced by dietary treatments. Feeding time was longer for CAC than HAY, while physiological responses remained unchanged across treatments. Including forage watermelon or cactus increased dietary water intake without negatively affecting water balance, average daily gain, final body weight, nor thermoregulation when used as partial replacements for Tifton 85 hay in feedlot sheep diets.

2026-01-01T00:00:00Z ARAÚJO, C. de A. ARAUJO, G. G. L. de SIGNOR, D. SANTOS, A. P. G. MORAES, S. A. de SILVA, T. G. F. da LIMA, D. O. RESENDE, A. M. D. GOIS, G. C. VOLTOLINI, T. V. https://www.alice.cnptia.embrapa.br/alice/handle/doc/1187604 2026-06-21T10:45:29Z 2026-01-01T00:00:00Z

Título: Are greenhouse gas emissions and soil chemical characteristics affected by planting density, organic fertilization, and saline water irrigation in cactus pear cultivation? Autoria: ARAÚJO, C. de A.; ARAUJO, G. G. L. de; SIGNOR, D.; SANTOS, A. P. G.; MORAES, S. A. de; SILVA, T. G. F. da; LIMA, D. O.; RESENDE, A. M. D.; GOIS, G. C.; VOLTOLINI, T. V. Conteúdo: Understanding nitrogen dynamics in arid agricultural systems is essential for mitigating greenhouse gas (GHG) emissions in climate-constrained environments. This study evalu- ated the effects of planting density, organic fertilization, and saline water irrigation on soil chemical properties, carbon and nitrogen stocks, and emissions of CO2, CH4, and nitrous oxide (N2O) in cactus pear cultivation systems. A 2 × 2 × 2 factorial arrangement was used to test two planting densities (30,000 and 75,000 plants ha−1 ), two organic fertilizer rates (0 and 30 Mg ha−1 ), and two saline irrigation depths (0 and 25% of ET0). Higher planting density increased soil moisture and carbon content while reducing CO2 and CH4 emissions. Organic fertilization increased the soil C ratio and phosphorus availability and significantly enhanced N2O emissions, whereas unfertilized systems showed negative N2O fluxes. Saline water irrigation reduced N2O emissions, resulting in negative fluxes (−12.50 μg N m−2 h −1 ), indicating potential suppression of nitrification and denitrifica- tion pathways. None of the evaluated factors significantly affected soil nitrogen stocks. Total GHG emissions (CO2-eq) were lower in denser cultivation systems. These results demonstrate that the interaction among high planting density, organic fertilization, and supplementary saline irrigation modulates nitrogen transformations and N2O emissions in semi-arid soils, highlighting management strategies to mitigate nitrogen-derived GHG emissions in cactus-based agroecosystems.

2026-01-01T00:00:00Z SHAHZAD, F. DORON, M. SARGENT, S. A. FREITAS, S. T. de BRECHT, J. K. https://www.alice.cnptia.embrapa.br/alice/handle/doc/1187398 2026-06-14T17:54:49Z 2026-01-01T00:00:00Z

Título: Is it possible to substitute MAP with or without ethylene scrubbing for CA in marine transport of tree-ripe mango? Autoria: SHAHZAD, F.; DORON, M.; SARGENT, S. A.; FREITAS, S. T. de; BRECHT, J. K. Conteúdo: Mangos from South America can require 4 or more weeks for marine transport to the USA. To achieve these shipping durations, green (unripe) fruit are currently transported in air at 7-9°C (i.e., below their chilling threshold temperature). This results in poor quality, especially flavor, in the marketplace. Controlled atmosphere (CA) can allow mature-green mangos to be stored for up to 6 weeks at 12°C, but sensory quality is questionable; alternatively, tree-ripe mangos can be stored in CA for up to 4 weeks at 7°C with good flavor. Unfortunately, CA marine transport is not considered to be a feasible approach for these mango exports due to high expense and logistical issues. To overcome these obstacles, we targeted shipping tree-ripe mangos in modified atmosphere packaging (MAP) at lower temperatures with ethylene scrubbers to supplement MAP effects in inhibiting overripening during extended transport. We first determined the optimum O 2 and CO 2 concentrations for storage of ‘Tommy Atkins’, ‘Kent’, and ‘Keitt’ mangos using CA, then worked with Breatheway ® MAP and RYPEN™ ethylene control filters to duplicate the optimum CA in storage experiments simulating marine transport from South America to US markets. The study concluded with three commercial shipments from Brazil to New Jersey (‘Kent’ and ‘Tommy Atkins’) and Peru to California (‘Kent’). The optimum CA was 6 kPa O 2 plus 5 or 10 kPa CO 2 for ‘Tommy Atkins’ and 4 kPa O 2 plus 5 or 10 kPa CO 2 for ‘Keitt’. The MAP equilibrated at 6 kPa O 2 + 9 kPa CO 2 for both cultivars. The CA and MAP both slowed ripening in terms of softening, external and internal color changes, and changes in soluble solids and titratable acidity. Scrubbing reduced ethylene in the MAP by 85% and further inhibited ripening-related softening and color changes. Sensory evaluation confirmed that fruit in MAP remained less ripe than the controls during shelf life. Commercial shipping tests of mangos in MAP with or without ethylene scrubbing, from Brazil to New Jersey, USA and from Peru to California, USA, confirmed the lab results.

2026-01-01T00:00:00Z OLIVEIRA, P. S. T. de AZEVEDO, G. A. de PEREIRA, R. Y. F. SILVA, A. F. ANDRADE, H. A. F. de CORDEIRO, K. V. BARROSO, V. B. MACHADO, N. A. F. MATOS, R. R. S. da S. https://www.alice.cnptia.embrapa.br/alice/handle/doc/1187359 2026-06-14T17:54:20Z 2022-01-01T00:00:00Z

Título: Production of cassava seedlings on substrates based on decomposed buriti stem. Autoria: OLIVEIRA, P. S. T. de; AZEVEDO, G. A. de; PEREIRA, R. Y. F.; SILVA, A. F.; ANDRADE, H. A. F. de; CORDEIRO, K. V.; BARROSO, V. B.; MACHADO, N. A. F.; MATOS, R. R. S. da S. Conteúdo: n the cassava (Manihot esculenta Crantz) cultivation system, planting seedlings directly in the field is widely used. However, establishment of plants by this method is slow, taking about 15 days to start the formation of shoots and roots. The plant in this phase is not very competitive, which leads to the formation of uneven and low-productivity areas. Production of seedlings on substrates is an alternative that can improve the uniformity of the plant stand, as well as allow more careful selection of the best propagules. Viability of this propagation method depends on the substrate, which must have ideal physical and chemical properties to meet the needs of the crop. The objective of this work was to evaluate the use of decomposed buriti stem (Mauritia flexuosa L. f) as a substrate in the propagation of cassava seedlings. The substrates were composed of decom- posed buriti stems and soil in the following proportions: 0:100; 20:80; 40:60; 60:40; 80:20; and 100:0 (volume). The addition of decomposed buriti stem improved development of the aerial part, provided greater survival for cassava seedlings in an increasing linear fashion, and promoted increases in the levels of N, P, K, Ca, and Mg of cassava seedlings. It was determined that there is agronomic efficiency in the use of buriti residue for the production of cassava seedlings.

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