Nutrição fosfatada e rendimento do feijoeiro sob influência da calagem e adubação orgânica

Abstract

Being an essential nutrient in several cellular functions, the phosphorus frequently limits the development of the bean plant due its high capacity of adsorption to mineralogical components of the soil and low availability for the plants absorption. Soil management practices, such as the increase in the level of organic matter and liming are quite effective in the reduction of the phenomenon of adsorption of P in the soil and increase of its availability for plant absorption. Aiming to evaluate the effect of doses of bovine manure and lime on the phosphate nutrition and production of the bean plant, four experiments were conducted in the greenhouse of the Soil Science Department of the Federal University of Lavras. The experimental design was completely randomized, in a 5x4 factorial scheme with four replications, in pots containing 3 dm3 of soil samples from an Orthic Quartzarenic Neosol (RQo), a Dystrophic Red–Yellow Latosol, medium texture (LVAd–1), a Dystrophic Red–Yellow Latosol, clayey texture (LVAD–2), and a Dystrophic Red Latosol, very clayey texture (LVd), in which three bean plants were cultivated. The treatments were constituted by the application of five doses of bovine manure (0; 2.5; 5.0; 7.5, and 10 % of the volume of the soil) and four liming levels (0; 0.5; 1, and 2 times the recommended dose to reach V=60%). It were evaluated the production of dry matter of aerial part and grains and the P accumulation in dry matter of total aerial parts of beans plants. The liming and organic fertilization promoted increases in the absorption and accumulation of P, and production of grains of the bean plant, which presented the best responses with the dose of 10 % of bovine manure combined with the level 1 of liming.