Variabilidade espacial dos atributos químicos do solo em povoamento de Tectona grandis

Abstract

VARIABILIDADE ESPACIAL DOS ATRIBUTOS QUÍMICOS DO SOLO EM POVOAMENTO DE Tectona grandisRESUMO: Considerando a necessidade por informações que visem a identificar e medir as relações espaciais dos fatores edáficos que limitam o desenvolvimento dos povoamentos de teca, neste trabalho, objetivou-se caracterizar a variabilidade espacial dos atributos químicos pH, fósforo, potássio, cálcio, magnésio, matéria orgânica e alumínio do solo e compará-las em dois períodos de avaliação, ao segundo e nono ano de idade, de um povoamento de teca no estado de Mato Grosso, Brasil. Foram alocadas 46 unidades amostrais e coletadas amostras de solo, a 0-0,2 m de profundidade, para a posterior modelagem geoestatística. Foram observadas alterações espaciais dos atributos químicos do solo entre as avaliações, o que permite recomendar adubações e correções de acidez do solo em regiões específicas da área florestada, visando ao estabelecimento dos indivíduos pós-plantio e o desenvolvimento daqueles conduzidos pós-desbastes. SPATIAL VARIABILITY OF THE SOIL CHEMICAL ATTRIBUTES IN Tectona grandis STANDABSTRACT: Considering the need for information aimed at identifying and measuring the spatial relationships of edaphic factors that limit the development of teak stands, the objective of this study was to characterize and compare the spatial variability of soil chemical attributes: pH, phosphorus, potassium, calcium, magnesium, organic matter and aluminum at two and nine years old teak stand localized in State of Mato Grosso, Brazil. Plots were allocated and soil samples were collected at 0-0.2 m depth for geostatistical modeling. Spatial changes of soil chemical attributes were detected and possible fertilization and corrections of soil acidity in specific regions of the stand for the establishment of trees and their development after thinning were recommend.

Diagnosis and Spatial Variability of Soil Fertility and Crop Production in a Teak Area in Eastern Pará State.

“…The samples with values greater than 20 g kg -1 had the best classification of OM (Alvarez et al, 1999). Pelissari et al (2014) found OM values in a nine-year-old teak plantation located in Mato Grosso that ranged from 15 to 35 g kg -1 , which are values similar to those found in this paper.…”

Spatialization of Soil Chemical and Physical Attributes in an Agroforestry System, Seropédica, Brazil

“…In Nossa Senhora do Livramento (Mato Grosso, Brazil), geostatistics were used to characterize the spatial variability of the chemical attributes of the soil in a population of Tectona grandis over two evaluation periods (PELISSARI et al 2014). Their results differed from the results of this current study, specifically: the Gaussian and exponential models were fitted to the variable pH; the spherical and Gaussian models were fitted to Ca + , Mg 2+ , and Al…”

Growth and yield of teak stands at different spacing

“…Although the Inceptisol is more restrictive to teak cultivation (Medeiros, 2016) due to the occurrence of rock fragments in the soil mass (Santos et al, 2013), plant growth can be benefited by the nutrient reserves present in the soil, as observed by Tonini et al (2009) and Medeiros et al (2015). In addition, teak requires soils with higher phosphorus content and base saturation (Favare et al, 2012), and does not tolerate the presence of hydrogen and aluminum (Pelissari et al, 2014a(Pelissari et al, , 2014b, which were found in the Inceptisol evaluated in this work (Table 1).…”