Variabilidade espacial de atributos químicos do solo em áreas depinusdo instituto florestal de batatais - SP

Abstract

ResumoPoucos estudos têm sido conduzidos para verificar as relações existentes entre o crescimento das florestas e os atributos químicos dos solos, responsáveis pelo potencial produtivo. O objetivo deste trabalho foi avaliar a variabilidade espacial de propriedades dendrométricas sob povoamentos de Pinus e a relação destes com os atributos químicos de um Latossolo Vermelho Amarelo do Instituto Florestal de Batatais -SP. Para o mapeamento dos teores de Ca, Mg, P e K, as amostras de solos foram coletadas nos pontos de cruzamento de uma malha com intervalos regulares de 36 m, totalizando uma área de 16 hectares com espécies de Pinus, na profundidade de 0, 0-0,20 m e 0,20-0,40 m, sendo coletadas 123 amostras em cada uma das duas profundidades, totalizando 246 amostras. Ao redor de cada ponto georreferenciado foram selecionadas nove árvores de Pinus, de maneira que cada ponto cadastrado fosse rodeado de forma uniforme, realizando-se as medidas de altura e diâmetro na altura do peito. Os dados foram submetidos à análise estatística descritiva e geoestatística. De acordo com os estudos feitos e resultados obtidos, conclui-se que as árvores de Pinus apresentaram maior crescimento, com maiores valores de altura das árvores e do diâmetro na altura do peito, nas regiões em que os teores dos atributos químicos do solo foram maiores e nas região de menor declividade. Palavras chave: Geoestatística; Propriedades dendrométricas; Dependência Espacial. Spatial variability of chemical attributes in areas of the pinus institute of batatais -sp AbstractFew studies have been conducted to verify the relationship between the growth of forests and chemical properties of the soil, responsible for production potential. The objective of this study was to evaluate the spatial variability of dendrometric properties under Pinus stands and their relation with the chemical attributes of an Oxisol of the Forest Institute of Batatais -SP. For the mapping of Ca, Mg, P and K, the soil samples were collected at the crossing points of a grid with regular intervals of 36 m, with a total area of 16 hectares with species of Pinus, in the 0, 0-0,20 m and 0,20-0,40 m, and 123 samples collected in each of the two depths, totaling 246 samples. Around each georeferenced point were selected nine trees of pine, so that each point registered were surrounded evenly by performing the measurements of height and diameter at breast height. Data were submitted to descriptive statistical and geostatistical analysis. According to the studies done and results obtained, it is concluded that the pine trees grew faster, with greater height values of trees and diameter at breast height, in areas where the levels of soil chemical properties were higher and the lower-slope region. Key words: Geostatistics; Dendrometric properties Spatial dependence. Variabilidad espacial de atributos químicos del suelo en áreas de Pinus del instituto Florestal de Batatais -SP ResumenPocos estudios han sido realizados para verificar las relaciones existentes entre el crecimiento de las selvas...

Edaphic and Topographic Factors and their Relationship with Dendrometric Variation of Pinus Taeda L. in a High Altitude Subtropical Climate

“…In relation to SB, we did not find a significant linear correlation with height (r = -0.12), contrary to the findings of Rigatto et al (2005), Bellote and Dedecek (2006), and Ruiz et al (2016). Likewise, OM showed r = -0.15 with height and r = -0.04 with DBH ( Table 5).…”

GENETIC SELECTION OF Pinus taeda L. THROUGH MULTI-ENVIRONMENT TRIAL

“…It is so, because one of the breeding zones was set based on the combination of trials in different counties (locations A and D), and because the correlation of genetic performance recorded for progenies in locations in Rio Negrinho Municipality (Locations A, B and C) was moderate. Lower tree growth in locations recording higher declivity may have contributed to soil physical and chemical differences caused by the slope topography, as also highlighted by Gomes et al (2016), Ruiz et al (2016) and Horst et al (2018) for P. taeda. The most slopped sites should present lower DBH growth potential because they favor water and nutrient exportation from the system (RUIZ et al, 2016).…”