Use of egg shell as source of correction of soil acidity

Abstract

There are few studies in the literature related to the use of organic residues as soil acidity correctors. Eggshell is mainly composed of calcium carbonate, which is an important nutrient responsible for helping plant metabolism. The objective was to evaluate the efficiency of the use of eggshell in correcting soil acidity compared to dolomitic limestone. The experiment was conducted in a greenhouse, at the agrarian science institute, in the soil science area of ​​the Federal Rural University of the Amazon - UFRA, campus Belém-PA. A completely randomized design was used with nine treatments distributed in four replications. The treatments were allocated in pots with a capacity of 3 dm3 in which the amounts were 2.25; 4.5; 5.25; and 6 g of eggshell and dolomitic lime were applied according to chemical analysis of the soil. The experiment lasted 90 days, in which the pH was evaluated at 30, 45, 60 and 75 days while driving. Positive effects of the correctives applied were obtained in the different dosages used, in relation to the pH, in the evaluation periods of the treatments. Due to the ease of acquisition of the eggshell, this can be considered a good alternative for small producers because it is considered a residual product.