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Effect of silicon application to Eucalyptus camaldulensis on the population of ...
Queiroz, Dalva Luiz de; Camargo, Joelma Melissa Malherbe; Dedecek, Renato Antonio; Oliveira, Edilson Batista; Zanol, Keti Maria RochaThe use of silicon in forestry has increased recently as it is directly related to improved resistance to insect pests. The red gum lerp psyllid, Glycaspis brimblecombei, occurs in all eucalypt producing regions in Brazil. Two field experiments were conducted to study the effect of silicon applied to Eucalyptus camaldulensis on the psyllid population. In the first experiment, the applications were made via soil...
Chemical and mineralogical soil atributes from Comperj area due to variations i...
Gomes, João Bosco Vasconcellos; Curcio, Gustavo Ribas; Dedecek, Renato Antonio; Ramos, Michele RibeiroEstablishing Comperj (petrochemical complex Petrobras and partner companies at Itaboraí city, Rio de Janeiro State, Brazil) involves a great impact on natural environment, while it is an opportunity for actions of environmental compensation. The objectives of this study were to characterize soil chemistry and mineralogy of Comperjarea, based on landscape, particle size distribution and soil morphology, also con...
Calcium and potassium silicates and the growth of Eucalyptus grandis seedlings
Bognola, Itamar Antonio; Clasen, Lina Avila; Franciscon, Luziane; Gava, Jose Luiz; Dedecek, Renato Antonio; Silva, Fernando Márcio daThe use of silicate is a practice that has been frequently adopted in annual crops, although few studies have been conducted in order to verify its efficiency in forest tree species. The main objective of this research was to evaluate the effect of calcium and potassium silicates in the growth of seedlings of Eucalyptus grandis. The experiment was conducted in a greenhouse, in Alambari county, State of São Paul...
Soil Physical and Chemical Attributes and Their Relation to Pinus taeda Growth ...
Bellote, Antonio Francisco Jurado; Dedecek, Renato AntonioIn order to evaluate the effect of soil chemical and physical attributes on the productivity of 20 year-old Pinus taeda stands planted on different soil types and with different growth rates, four sites were selected based on previous inventory, in two municipalities in the State of Paraná. Experimental plots were established on these areas where dominant trees were selected. Data on DBH and height were recorde...
Carbon Accumulation in Pinus taeda Estimated by X-rays Densitometry and Trunk A...
Bellote, Antonio Francisco Jurado; Dedecek, Renato Antonio; Lavoranti, Osmir José; Tomazello Filho, Mario de Castro; Andrade, Guilherme de CastroThe objective of this work was to evaluate Pinus aeda growth and based on X-ray methods of densitometry and bole analyses to develop mathematical models to estimate carbon amount accumulated on trees of different ages varying on DBH. Five P. taeda plantations were selected on sites of different soils, thinning intensity and growing rate. On each site dominant trees were selected and discs cuts from different h...
Effects of Burning Harvesting Residues on Soil Chemical and Biological Characte...
Pomianoski, Danielle Janaina Westphalen; Dedecek, Renato Antonio; Montoya Vilcahuaman, Luciano JavierThe effect of burning residues was evaluated on soil chemical and biological characteristics under bracatinga (Mimosa scabrella Bentham) agroforestry system. This system uses to burn residues to assure revegetation of new harvest and to control weeds. Treatments tested were revegetation using fire and without fire and a test plot consisting of native forest. The period of sampling started on May 2002 until Augu...
Nutrition and Productivity Alterations in the Pinus taeda L. Caused by Cellulos...
Rodrigues, Celina Milani; Bellote, Antônio Francisco Jurado; Dedecek, Renato Antonio; Gomes, Fernando dos SantosBrazil produced in 2004, around 8 million tons of paper and 9,4 million tons of cellulose. Through the increasing production of paper and cellulose, the industries of this segment have generated a great amount of residues that requires viable future alternatives of disposal. Among these alternatives there is an application proposal of the cellulose residues in the forest growing. Thus, an experiment composed by...
Mineral nutrients, biomass and litter deposition on Eucalyptus plantation under...
Bellote, Antonio Francisco Jurado; Dedecek, Renato Antonio; Silva, Helton Damin daIt was evaluated the effect of different residue management systems in the plant nutrition status, nutrient contents in the litter and litter biomass yield, on Eucalyptus grandis plantation. Samples were taken on four residue management systems: (i) removal of all residues from previous harvesting and NPK fertilization; (ii) maintenance of all residues on soil surface and NPK fertilization; (iii) removal all at...
Influence of soil characteristics on black-wattle (Acacia mearnsii ) productivi...
Rachwal, Marcos Fernando Gluck; Curcio, Gustavo Ribas; Dedecek, Renato AntonioBlack-wattle growth is different on soils with distinct characteristics. To evaluate this influence, plant growth and wood production variables were quantified on black wattle growing on five soil classes with different morphological, physical and chemical characteristics, on SETA S.A. commercial plantation at seven years of age, on Butiá County, RS. It was measured the black wattle growth on the following soil...
Average Soil Particles Diameter to Predict some Soil Physical Properties
Milde, Gilson Antonio; Dedecek, Renato Antonio; Gava, José LuizThe main purpose of this work was to estimate soil physical characteristics that are time consuming, developing mathematical models based on others characteristics obtained routinely on soil laboratories. Thirteen soils were selected varying from 40 to 590 g kg-1 of clay content. From these soils, undisturbed and bulk samples were obtained at 5 cm to 15 cm soil layer, and determined in laboratory, chemical (so...