Distribuição diamétrica e relações hipsométricas para Eucalyptus Cloeziana F. Muell, localizado na Floresta de Inhamacari

Abstract

In order to optimize forest production and meet the requirements and needs of the consumer, it is important to have good knowledge and planning of forests through the control of its density, because for that to happen it can be used the distribution diametric, which allows estimating the number of trees per hectare existing in each class of diameter. Much research has been carried out on mathematical models that can be adapt the hypsometric relationship and there is also concern about the wide use of these models considering important factors. This work had as a general objective to analyze the diametric distribution and estimate hypsometric equations for an Eucalyptus stand cloeziana F. Muell, located in the Forest of Inhamacari, locality of Machipanda in the District of Manica as a function of the diameter at the height of the chest. The sampling unit used was the transect, the 14 transects had an area of ​​6.728 ha and a sampling intensity of 11.89%, had constant width of 20 meters and, as the shape of the plots is irregular, the length of the transects was variable, in which the DBH of all trees found in the transects in the universe of 3395 trees. The DAP was introduced according to its diametric class with an interval of 5 cm class, with a minimum DBH of 5 cm and the number of trees was calculated in all plots per hectare. For hypsometric relations, DBH and height of the 16 trees were measured respectively and 12 mathematical models were adjusted using the regression procedure. He can- it can be said that the histograms of diametric distribution of Eucalyptus cloeziana plots in Inhamacari, show that the number of trees per hectare in the stands is concentrated in the larger diametric classes, ie, [20-25 [and [30-35 [in cm. In the selection of the model, considered the coefficient of determination statistics Adjusted R 2 (%) = 52.3203, standard error of the estimate as a percentage of the average Syx (%) = 12.2093. The diametric distribution showed normal forest curve and the hypsometric relationship can be described by Trorey's model 3:(TRADUÇÃO NOSSA)