Considerando a crescente demanda por mudas florestais e escassez de matérias-primas dos substratos utilizados para o crescimento das plantas, faz-se necessário avaliar novos componentes formulações que assegurem qualidade mudas. Nesse experimento foram estudados desenvolvimento clonais Eucalyptus urophylla x E. grandis, provenientes miniestacas, em função nove composições substrato produzidos partir vermiculita granulometria fina, casca arroz carbonizada fibra coco tubetes 50 mL. Foram...

One important element influencing the efficiency of automated timber harvesting is harvester maintenance. However, understanding this effect limited, which can lead to more frequent harvest interruptions and consequently higher production costs. Data modeling be used evaluate how mechanical aspects affect maintenance in plantation forests, help with forest planning. This study aimed ascertain if characteristics may utilized develop a high-performance model capable properly forecasting using...

The correct capture of forest operations information carried out in plantations can help the management mechanized harvesting timber. Proper must be able to dimension resources and tools necessary for fulfillment helping strategic, tactical, operational planning. In order facilitate decision making managers, this work aimed analyze performance machine learning algorithms estimating productivity timber harvesters. As predictors productivity, we used availability hours use, individual mean...

http://dx.doi.org/10.5902/198050985082Os componentes utilizados na produção de substratos influem diretamente no ciclo vegetativo, qualidade e consequentemente nos custos das mudas. Nesse experimento estudou-se o desenvolvimento, mudas Eucalyptus grandis Hill ex Maiden × urophylla S. T. Blake, por meio propagação sexuada, utilizando 12 composições substrato. A análise dos resultados evidenciou que os puros, a exceção da fibra coco, não apresentaram características físicas adequadas para...

Background: In the context of mechanized timber harvesting, alterations in technical parameters, such as skidding distance and terrain slope, have potential to influence productivity production costs associated with self-propelled grapple skidder. Furthermore, these variables are inherently uncertain, which could potentially cause forest managers make inaccurate decisions. The objective was analyze whether four distances two slope classes skidder Eucalyptus planted forests from a stochastic...

To produce cuttings with quality, the most appropriate nutritional management strategies should be sought to reduce wastage of fertilizer, while accounting for characteristics each substrate. This study evaluated effect substrates and doses controlled-release fertilizer on quality Eucalyptus grandis Hill ex Maiden x urophylla S. T. Blake cuttings. The consisted several mixtures: vermiculite+carbonized rice chaff+coconut fibre (1:1:1); vermiculite+coconut (1:1); chaff (1:1). These mixtures...

This study aimed to evaluate the effect of substrates made composted sewage sludge and irrigation depths on growth quality E. grandis x urophylla cuttings optimize water management for each substrate. The were obtained from with sugarcane bagasse or Eucalyptus bark, namely: (1:3 v:v); bark v:v) a mixture both in volumetric proportion 2:1 (v:v). Commercial substrate composed Sphagnum peat, vermiculite rice husk (3:1:1 v:v: v) was used as control. tested 11, 14 17 mm, applied two daily...

Choosing the ideal number of rotations planted forests under a silvicultural management regime results in uncertainties cash flows forest investment projects. We verified if there is parity Eucalyptus wood price modeling through fractional Brownian motion and geometric to incorporate managerial flexibilities into projects forests. use empirical data from three production cycles with grandis × E. urophylla projection discounted flows. The price, assumed as uncertainty, was modeled using...

With the growing demand for investment projects in renewable energy, it is essential economic feasibility analysis to consider inherent uncertainties of these and enable more accurate decisions. In this way, we analyze whether photovoltaic panels produce electrical energy a forest nursery are economically viable through real options. We with an initial USD 90,417 panels. The managerial flexibilities deferral, expansion 30.0% production capacity, project’s abandonment were inserted into...

The amount of available water for nursery irrigation is forecasted to decline on this decade and over or deficit watering seedlings may have adverse consequences. To produce quality accelerate the restoration ecosystems prevent further environmental damage, management should be reformed, especially endangered species, such as Aspidosperma polyneuron Müll. Arg. objective work was evaluate effect three gross depths (8, 11 14 mm) applied daily two frequencies (two four times a day) growth,...

Research Highlights: The mean leaf angle and crown projection area can be used as criteria for grouping tree seedling species in different irrigation zones nurseries with overhead microsprinkler systems, preventing water fertilizer waste, increasing growth. Background Objectives: There are important gaps current functional knowledge about how plant architecture, especially the angles of seedlings, affect nutrient solution capture systems. These contribute to waste nurseries. This research...

Background: Experts in ecological restoration have discussed the cost reduction to make forest financially feasible. This is very important developing countries, such as Brazil, and for smallholder farmers; however, economic studies do not usually consider uncertainties their analysis. Therefore, this study aimed analyze, under conditions of uncertainty, how tropical tree seedlings produced polyethylene bags, tubes, biodegradable containers (Ellepot®) interfere with costs implementation...

QUALIDADE MORFOLÓGICA DE MUDAS INGÁ SOB DIFERENTES MANEJOS HÍDRICOS LUIZ GUSTAVO MARTINELLI DELGADO¹; RICHARDSON BARBOSA GOMES DA SILVA² E MAGALI RIBEIRO SILVA¹ 1Departamento de Ciência Florestal, Faculdade Ciências Agronômicas, UNESP - Universidade Estadual Paulista, Campus Botucatu, SP. CP 237, CEP 18610-307. E-mails: lgmdelgado@hotmail.com; magaliribeiro@fca.unesp.br2Faculdade Orígenes Lessa, ALEC – Associação Lençoense Educação e Cultura, Lençóis Rod. Osni Matheus, km 108. E-mail:...

In forest nurseries, irrigation management becomes more complex as different seedlings of tropical species, with architectures, are grown close to each other. this context, there gaps in knowledge about the physiological responses species mean leaf angles when subjected depths. Thus, work aimed analyze whether affect efficiency and, consequently, tree seedlings. Six were submitted three depths (6, 9, and 12 mm) applied daily by micro-sprinklers a completely randomized design split plot...

Tactical planning in timber harvesting involves aspects related to forest macro-planning and, particularly, the allocation of resources and sequencing activities, all which affect yards roads productivity machines. Data-driven approaches encourage use information obtained from data enhance decision-making efficiency support development short-term strategies. Therefore, our investigation was intended determine whether a data-driven approach can generate sufficient input for modeling forwarder...

In the context of increased demand for timber, forest managers must consider best practices in management and harvesting operations. Depending on systems adopted, uncertainties cost components may reflect volatility productivity expected value project. We investigated whether have an influence mechanized timber investment project with a feller buncher. Monthly buncher volatilities were measured based absolute percentage variation deviation components. modeled using geometric Brownian motion...

Weather is a significant factor influencing forest health, productivity, and the carbon cycle. However, our understanding of these effects limited for many regions ecosystems. Assessing impact weather variability on harvester productivity from plantation forests may assist in planning through use data modeling. We investigated whether combined with timber harvesting attributes could be used to create high-performance model that accurately predict Eucalyptus plantations using machine...

The implementation and discussion of Payment for Environmental Services (PES) programs has gained prominence in environmental policy. However, there are still knowledge gaps regarding economic indicators that fundamental the analysis viability financing PES projects. Thus, obtaining information related to investment projects can contribute future decision-making. In this context, objective was estimate Equivalent Uniform Annual Cost (EUAC) subwatersheds State São Paulo under conditions...

Reduced-impact logging is a key aspect of sustainable forest management in the Brazilian Amazon. Real Options Analysis (ROA) improves evaluation certified projects, increases their value, and supports investor confidence. This study evaluates economic viability investment project areas Amazon, using ROA to incorporate uncertainty managerial flexibility into decision-making process. The analysis focused on an Ombrophilous Dense Forest its first cutting cycle, with 30 species diameter at...

Diagnosing climate variability and environmental change in floodable regions is essential for understanding mitigating impacts on natural ecosystems. Our objective was to characterize degradation the Brazilian Pantanal by identifying changes vegetation water cover over a 30-year period using remote sensing techniques. We evaluated surface physical–hydric parameters, including Land Use Cover (LULC) maps, Normalized Difference Vegetation Index (NDVI), Modified Water (MNDWI), Moisture (NDMI),...

IS IT POSSIBLE TO SAVE WATER WITHOUT LOSING QUALITY IN THE GUANANDI SEEDLING PRODUCTION? RICHARDSON BARBOSA GOMES DA SILVA1 AND MAGALI RIBEIRO SILVA2 1PhD Student in Forest Science, School of Agronomy, UNESP - Univ Estadual Paulista -. Botucatu, SP, Brazil. E-mail: richardsonunesp@gmail.com2Assistant Professor, Paulista, Campus magaliribeiro@fca.unesp.br 1 ABSTRACT In this study we examined if the irrigation depths (8, 11 and 14 mm), applied daily, splitted two frequencies (two four times a...