科研之友
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摘要
this study aimed to analyze the vegetation structure and soil characteristics of two deciduous forests, hereafter referred to as funil 1 and funil 2, located in the araguari river valley, triangulo mineiro region. sixty 10℅20 m plots were laid out in each forest. all trees with a minimum circumference of 15 cm at 1.30 m above ground were sampled. soil samples were collected from 20 plots in each forest. canonical correspondence analysis (cca) was used to check relationships between species distribution and soil characteristics. funil 1 had a density of 1695 ind./ha and basal area of 16.25 m2/ha. a total of 64 species, 49 genera and 32 families were found in the area. funil 2 had a density of 937.5 ind./ha, basal area of 14.02 m2/ha and a total of 46 species, 39 genera and 22 families. shannon's index for funil 1 and funil 2 was 2.76 and 2.59, respectively. pielou's evenness index was the same in both environments (j' = 0.66). chemical analysis of forest soils showed high similarity. in contrast, there were significant physical differences between funil 1 and funil 2 soils. soil humidity of funil 1 and 2 changed during the year (anova f = 367.67; df = 3; p < 0.001); december was the wettest month and september, the driest month. canonical correspondence analysis showed that most of the species were distributed throughout the area in both forests, differing only abundance.
