This study aimed at verifying the efficiency of early selection, and estimating the genetic parameters in Dipteryx alata. The 66 half-sib families were obtained from three seed provenances at the Brazilian Savannah of the state of Minas Gerais. The experiment was carried out in a randomized block design with 3 replications and 5 plants per plot. Data diameters at breast height (DBH) and total height (TH) were taken at the ages of 64, 125 and 138 months. REML/BLUP methodology was applied in the D. alata different provenances and progenies. Analysis indicated significant genetic variability (P < 0.01) between and within provenances. Both traits, DBH and TH, presented high narrow sense heritability for the ages analyzed. High genetic correlation occurred between DBH and TH traits, and between ages (age-age); thus, it allowed indirect selection, as well as early selection with high genetics gains.

The present work aimed to evaluate the wood of fourteen genetic materials (nine species, between native and exotic, and five clones of Eucalyptus) cultivated under two post-planting irrigation regimes in the Brazilian semiarid region. For each genotype, six trees (11 years old) were selected and subjected to two initial irrigation regimes (up to 12 months and up to 36 months) after planting. Discs of different stem heights were taken: 0% (base), breast height (DBH), 20%, 40%, 60%, 80%, and 100%. Samples were extracted along the radial axis of each disk at three regions (the pith-adjacent region, intermediate region, and bark-adjacent region). Samples were subsequently saturated in water to determine their density via the water displacement method. The irrigation systems caused changes in the pattern of radial and longitudinal variation in the clones regarding the proportion of woody material in the stem. Among the native species, Angico stood out with a high density and little juvenile wood, and Pau d’arco, with a low density and a high rate of juvenile wood. Among the exotic species, Nim presented a high density and a low rate of juvenile wood, and Chichá presented a high rate of juvenile wood and a low density. In the Eucalyptus hybrids, VE38 stood out with a high density. Overall, there was an influence from irrigation management, observed with greater intensity in exotic species for Mahogany and Acacia and for the VE41 and AEC1528 clones of Eucalyptus. The values of basic densities in the trees varied from 0.35 to 0.85 g·cm⁻³. There was good adaptation of native and exotic species and clones to the planting area in the Semiarid region.

The use of management strategies or changes in the cultivation environment can reduce the impacts of irrigation water salinity on plant development. Therefore, in this research, physiological responses, initial growth, and plant quality of Anadenanthera colubrina (Vell.) Brenan (Angico Branco) were evaluated under different levels of shading and electrical conductivity of the irrigation water, seeking to identify the most favorable conditions for the development of this species using brackish water. The experiment was carried out in randomized blocks with split plots and four replications. The plots were formed by four environments with different shading levels: 0 (full sun), 30, 50, and 70%, and the subplots, formed by five increasing levels of electrical conductivity of the irrigation water: 0.4, 1.6, 2.8, 4.0, and 5.2 dS.m−1. The following variables were evaluated: substrate electrical conductivity, leaf gas exchange, plant height, biomass production, and Dickson quality index at 40 days in a nursery. The use of artificial shading favored plant development and photosynthesis rate, even when irrigated with moderate and high salinity water. The DQI showed that A. colubrina plants presented higher quality index when produced under intermediate shading (30% and 50%), with yield losses below 20% when irrigated with water with electrical conductivity up to 2.8 dS.m−1.

The aim of this study was to characterise the lignocellulosic fractions of pruning waste from tree speciesshowing potential for furniture production in Acaraú, Ceará. The experiment was conducted in a completely randomised, splitplotdesign, with the plots corresponding to two water regimes (irrigated for one year and irrigated for three years) and thesub-plots to eight tree species, with three replications. The chemical attributes were determined after seven years. Except for theinsoluble lignin content, there was a significant effect from the different species in terms of the chemical properties of the wood.The results for the lignocellulosic fractions show the possibility of developing technological ways of adding value to thesewaste products, especially considering their lignin content. The different species also showed potential for use in producingcellulose pulp, with the exception of Handroant hus impetiginosus due to its high ash content. The results of this study offer newperspectives for future research into the use of forestry waste. O objetivo deste trabalho foi caracterizar frações lignocelulósicas dos resíduos oriundos da poda de espécies arbóreas com potencial moveleiro em Acaraú – CE. O experimento foi conduzido seguindo um delineamento inteiramente casualizado, em arranjo com parcelas subdivididas, sendo as parcelas correspondentes aos dois regimes hídricos (irrigado até um ano e até três anos) e as sub-parcelas às oito espécies com três repetições. Aos sete anos foram determinados os atributos químicos. Verificou – se efeito significativo para as espécies quanto às propriedades químicas da madeira, exceto para os teores lignina insolúvel. Os resultados das frações lignoceulósicas indicam possibilidade de desenvolver rotas tecnológicas para agregação de valor desses resíduos, notadamente considerando seus teores de lignina. As espécies também demostraram potencial para serem utilizados na produção de polpa celulósica, com exceção do Pau d’arco roxo devido ao alto teor de cinzas. Os resultados encontrados nesse estudo abrem portas para pesquisas futuras com o aproveitamento de resíduos florestais.

This study aimed to analyze the scientific landscape of research on the cultivation and management of Eucalyptus from 1986 to 2026. The findings indicate that Eucalyptus production plays a strategic role in Brazilian forestry, particularly in tropical regions and within the Cerrado biome, where forest plantations contribute substantially to the supply of timber, biomass, and raw materials for the pulp and energy sectors. However, environmental constraints, including highly weathered soils, climatic variability, and recurrent periods of water deficit, may limit plantation growth and productivity, thereby requiring management practices and genetic improvement strategies capable of enhancing both productivity and the sustainability of these forest systems. A quantitative, descriptive, and exploratory bibliometric review was conducted in accordance with PRISMA guidelines. Data were collected from the Scopus database using descriptors related to Eucalyptus cultivation and silviculture within the TITLE-ABS-KEY field. The initial search retrieved 37.767 records, which were subsequently reduced to 1.006 documents after thematic and geographical refinement. Following the removal of duplicates and the application of eligibility criteria based on the screening of titles, abstracts, and full texts, the final dataset comprised 28 scientific articles. The results reveal a steady increase in scientific output over recent decades, with a marked concentration of publications in journals specializing in forest sciences, particularly Forest Ecology and Management. The findings also point to the strong leadership of Brazilian institutions and the consolidation of international research networks, accentuate the global relevance of studies focused on productivity, management, and sustainability in Eucalyptus plantations.

É possível desenvolver a silvicultura no semiárido brasileiro? Essa foi a questão que motivou esta pesquisa. A demanda global por madeira intensificou-se nas últimas décadas. Portanto, é necessário atender às demandas regionais e estimular o aumento da produtividade dos plantios florestais em regiões onde a silvicultura ainda não está consolidada. Este estudo avaliou a produtividade de espécies florestais nativas e exóticas, e de clones de Eucalyptus, sob diferentes regimes de irrigação no Semiárido brasileiro. O estudo foi conduzido em um plantio experimental na região semiárida do Estado do Ceará, entre 2011 e 2021. Em um plantio que inicialmente apresentava 38 espécies, entre nativas e exóticas, além de 7 clones de Eucalyptus, todos submetidos a dois regimes de irrigação distintos (irrigados por até 12 meses e por até 36 meses), foram selecionadas quatro espécies nativas, cinco espécies exóticas e cinco clones com potencial silvicultural para implantação na região. Os indivíduos deste grupo foram avaliados cerca de 11 anos após o plantio. Durante o período de análise, foram contabilizadas as mortalidades e obtidas as variáveis dendrométricas: altura total e altura comercial, diâmetro à altura do peito, áreas transversal e basal, volume do fuste, volume total, fator de forma e aumento médio anual no volume de madeira produzido. Concluiu-se que o cultivo comercial de espécies florestais na região semiárida brasileira é possível, desde que sejam selecionadas espécies adaptadas às condições edafoclimáticas locais. Estes resultados podem impulsionar o desenvolvimento da silvicultura na região semiárida do Nordeste brasileiro. Palavras-chave: plasticidade; manejo da irrigação; déficit hídrico; dendrometria. Silviculture in the Brazilian Semiarid region: growth and productivity of forest species in different irrigation regimes Is it possible to produce forestry in the Brazilian semi-arid region? That was the motivating question of this research. The global demand for wood has intensified in recent decades. Therefore, there is a need to meet regional demands and stimulate increased productivity of forest plantations in regions where forestry is not yet consolidated. This study evaluated the productivity of native and exotic forest species and Eucalyptus clones under different irrigation regimes in the Brazilian Semi-arid Region. The study was conducted in an experimental plantation between 2011 and 2021 on a plot in the Ceará State, in a semiarid region. A plantation that initially included 38 native and exotic species and seven Eucalyptus clones, all subjected to two different irrigation regimes (irrigated for up to 12 months and irrigated for up to 36 months), resulted in the selection of four native species, five exotic species, and five clones with silvicultural potential for implementation in the region. Individuals in this group were evaluated approximately 11 years after planting. During the analysis period, mortality was recorded, and the following dendrometric variables were obtained: total and commercial height, diameter at breast height, cross-sectional and basal areas, stem volume, total volume, shape factor, and average annual increase in timber production. Thus, it is concluded that commercial cultivation of forest species in the Brazilian semiarid region is possible, provided that species adapted to the respective edaphoclimatic conditions are selected. Keywords: plasticity; irrigation management; water deficit; dendrometry.