Qualidade do calcário sob diferentes condições de armazenamento na Região das Missões

Abstract

The acidity of the soil caused by aluminum toxicity has direct interference in the physiology of plants affecting the absorption of nutrients. The elevation of the pH of the soil to levels approaching 6.0 and 6.5 enhances the availability of nutrients in the soil, being achieved through the liming. The soil correctives are materials from rocks, composed of ECaCO3, and must have minimum levels of these constituents to be considered as correctives. The region of missions is composed in its majority by acidic soil, which entails the use of liming as a means of enabling productivity. To view addition, this study sought to evaluate the basic attributes that constitute the correctives traded in the region of missions, and to evaluate the quality of the same in relation to the description of the physical and chemical properties of these materials in your marketing. For this, samples were taken of correctives on properties in the region of Missions, the physical and chemical data of the correction described in the purchase and your type of storage, in Big Bag or in the field. The samples passed by laboratory analysis for determination of their attributes on the reactivity, power of neutralization, relative power of total neutralization and contents of CaO and MgO. The results showed that in relation to the reactivity materials are of acceptable quality, storage has no influence on this attribute. In the power of neutralization, 65% of samples has dubious quality/lower and storage for golf negatively influences significantly this parameter. In relation to the relative power of total neutralization, the samples showed lower quality/doubtful in 70% of the total, this parameter is negatively affected more significantly in storage in the field, being that all samples that showed lower quality storage/doubtful. It is concluded that the re of samples is acceptable and the storage type does not influence this parameter. Most of the lime used has a lower quality than that reported by suppliers in the parameters of the PN and PRNT, these being influenced in a negative way by two types of stores, but more significantly in storage in the field.