Análises de fatores que afetam o desenvolvimento de laranjeiras-peras: estudo de caso em Caçapava do Sul – RS

Abstract

The present work refers to a case study of an unproductive area for trees of the Citrus sinensis genus of the orange-pear species, located in the Municipality of Caçapava do Sul/RS. Its trunks are small and thin, its fruits are hard and reach a maximum of 2 cm in diameter, with dry pulp, rusty rind, the leaves atrophy, yellow, rust and break. Interestingly, 500 meters away, on the neighboring property, there is an excellent development of the same species of Citrus Sinensis tree, with pear orange productions in the expected quality standards. In order to understand what influences the development of orange trees, three soil samples were collected from the unproductive area (recognized as the first area) and a sample from the productive area (second area) for investigation, analysis and interpretation of the properties of this soil, in order to There are physical evidences with the low productivity of the area. The results of the unproductive area, pointed out granulometry, low content of organic matter and consequently low content of nutrients, presence of aluminum and manganese in excess, acidic acid pH. As characteristics pointed to a soil considered, they are representative of infertile orange trees. An ideal soil would be loamy loam, as it has greater porosity, good drainage, higher content of organic matter and nutrients. As samples of the sample of individual results of the area, presented similar to the results of the unproductive area, indicating that the unproductiveness of the first area, is not related to the low levels of nutrients and its physical composition. Furthermore, it is necessary to analyze other factors that may influence the poor development of pear trees.