https://www.alice.cnptia.embrapa.br/alice/handle/item/151 Artigo em periódico indexado (CNPF) 2026-04-11T14:05:49Z https://www.alice.cnptia.embrapa.br/alice/handle/doc/1186076 Título: Mobilidade de P, Cu e Zn em colunas de solo sob sistema de semeadura direta submetido às adubações mineral e orgânica. Autoria: BERTOL, O. J.; FEY, E.; FAVARETTO, N.; LAVORANTI, O. J.; RIZZI, N. E. Conteúdo: A retenção, no perfil do solo, de elementos minerais aplicados em sua superfície é fundamental para a manutenção da qualidade da água. Nesse sentido, o objetivo deste trabalho foi avaliar o efeito da aplicação de dejeto líquido de suíno e adubo mineral na lixiviação do P, Cu e Zn em colunas indeformadas de solo (25 cm de altura e 20,3 cm de diâmetro) retiradas de uma área de Latossolo Vermelho eutroférrico típico sob semeadura direta. A água foi aplicada nas colunas de forma ininterrupta, na quantidade correspondente a três volumes da porosidade total do solo (10.020 cm³), sendo a coleta e análise dos elementos subdivididas em cinco frações. Cada volume de poros (3.340 cm³) corresponde a um turno de água percolada, e o primeiro volume foi fracionado em três coletas. A concentração dos elementos no solo foi determinada nas camadas de 0 a 2,5, 2,5 a 10 e 10 a 20 cm. A retenção de P, Cu, e Zn no solo, em relação ao aplicado via dejeto líquido de suíno, foi de 99,6, 98,8 e 100 %, respectivamente. Para o P aplicado via adubo mineral, a retenção foi de 89,7 %. Independentemente do tipo de adubo, as concentrações de P, Cu e Zn no solo foram maiores na camada de 0 a 2,5 cm. Esses resultados indicam o baixo potencial de lixiviação desses elementos, o que sugere ser importante o uso de práticas de manejo e conservação do solo e da água que proporcionem a contenção e a infiltração do escoamento superficial. 2010-01-01T00:00:00Z https://www.alice.cnptia.embrapa.br/alice/handle/doc/1186083 Título: Phosphorus fertilization and yerba mate (Ilex paraguariensis A. St.-Hil.) seed quality. Autoria: ALMEIDA, D. N. de; STREMEL, J. S.; MICHELON, T. B.; VIEIRA, E. S. N.; MOTTA, A. C. V. Conteúdo: Yerba mate seedling production is inefficient and costly, as the seeds have slow and low germination (<20%) and are often embryoless. Because the plant is grown in low-fertility soils, particularly in terms of phosphorus, nutritional deficiencies in the mother trees likely contribute to poor seed quality. Therefore, this study investigates the impact of phosphorus fertilization on the seed quality of yerba mate (Ilex paraguariensis A. St.-Hil.). The experiment was conducted in a seed production area with 1,822 plants, using P2O5 doses of 0, 48, 96, 182, and 288 kg.ha-1. Seed quality was assessed by the 1% tetrazolium test, thousand-seed weight (TSW), and the seed phosphorus content was determined. The results indicated no difference between treatments in seed phosphorus content or 1,000-seed weight, which was 8.0 g. However, seed viability increased with phosphorus application, with the highest quality observed in the 288 kg P2O5 ha-1 treatment. Phosphorus-fertilized mother plants were 2.58 times more likely to produce seeds with embryos. The study demonstrated that phosphorus plays a fundamental role in seed quality, improving viability and embryo presence. 2026-01-01T00:00:00Z https://www.alice.cnptia.embrapa.br/alice/handle/doc/1186035 Título: Validation of satellite-based and gridded precipitation products for gap-filling in precipitation series in the Eastern Amazon. Autoria: SOUZA, G. N. B. de; SILVA, J. A. de F. e; RIBEIRO, K. L.; OLIVEIRA, L. R. de; SILVA, P. R. T. da; CASTELLANI, D. C.; BUENO FILHO, J. S. de S.; SANTIAGO, A. V.; VASCONCELOS, S. S.; TEIXEIRA, W. G.; ARAUJO, A. C. de Conteúdo: Accurate precipitation measurement is essential for climate, hydrological, and agronomic studies. However, in regions such as the Amazon, the scarcity of rain gauges and frequent gaps in historical series pose a significant challenge for long-term analyses. This study evaluated the performance of satellite and gridded precipitation estimates for gap-filling daily rainfall data recorded between 2019 and 2024. The observed dataset was obtained from a micrometeorological tower installed in an oil palm-based Agroforestry System (AFS) in the Eastern Amazon. The evaluation employed widely recognized statistical metrics, such as the coefficient of determination (R2), root mean square error (RMSE), mean absolute error (MAE), percent bias (PBIAS), Nash-Sutcliffe efficiency (NSE), and Willmott’s index of agreement (d). Additionally, cumulative precipitation curves from different databases were compared with the observed series to identify over- or underestimation trends. The results showed that, among the tested databases, NASA Power (NP) exhibited the best performance in terms of consistency and lower bias, making it the most suitable for filling gaps in the observed series. The analyses highlighted the importance of a careful selection of alternative databases to ensure data continuity and quality in remote tropical regions, an essential aspect for hydrological modeling studies. 2026-01-01T00:00:00Z https://www.alice.cnptia.embrapa.br/alice/handle/doc/1186017 Título: Effect of planting mixed and facilitating species on the regenerating community. Autoria: SILVA JUNIOR, R. G. da; ÂNGELO, A. C.; COSMO, N. L.; RIOS, R. C.; BRESSIANI, L. de S. T.; MASTELLA, A. D. F.; SCHNEIDER, C. R.; SOUZA, K. K. F. de; ISERNHAGEN, I.; CAPELLESSO, E. S.; OLIVEIRA, E. S. Conteúdo: Ecological restoration is essential to recovering degraded ecosystems and reestablishing fundamental environmental processes such as stability, succession, and resilience. This study evaluated whether the mixed planting of eight native forest species and the facilitator species Baccharis dracunculifolia influences Floristic community composition and diversity indices, phytosociological parameters, patterns of species community composition between treatments, and the effect of overgrowth and light on natural regeneration in areas undergoing ecological restoration. The experiment was conducted at the Canguiri Farm Experimental Station, Paraná, Brazil, using a randomized block design with two treatments and four replicates. Plots of 432 m2 were monitored four and five years after planting (2023–2024). We do not find differences between treatments regarding Floristic composition. The results indicated that both treatments mixed planting (T1) and planting with facilitating species (T2) showed an increase in floristic richness, diversity, and abundance between 2023 and 2024, with T1 maintaining slightly higher values of diversity (Shannon index) and evenness (Pielou index) over time. Baccharis semiserrata and B. dracunculifolia stood out in the phytosociological parameters, being dominant in treatments and years. The PCoA analysis revealed significantly different floristic compositions between treatments in both years. Finally, a negative effect of light was observed on diversity and evenness in T1 in 2024 and on diversity and richness in T2 in 2023. 2026-01-01T00:00:00Z