Study of the Castor Oil Plant Pie in the Planting of the Castor Beans with Different Global Density of the Soil

It was aimed at with this work to evaluate the chlorophyll tenor in the leaves, of potassium in the pecíolos of the castor beans, the physical analysis of the soil and the tenors of the present macronutrientes in the leaves of the castor beans cultivated with growing doses of castor oil plant pie and degrees different from density of the soil. The experiment had beginning in the period of May 02, 2006 and he/she extended to September 02, 2006, in house-of-vegetation, without atmosphere control, of the National Center of Research of the Cotton (CNPA/Embrapa), in Campina Grande, State of Paraíba. It was used in the experiment the experimental delineamento in blocks casualizados, in outline of factorial analysis (4 x 4), with 3 repetitions, being the factors: four degrees of densities of the soil (1,4; 1,6; 1,8 and 2,0 kg. dm-3) and four doses of castor oil plant pie (0,0; 2,0; 4,0 and 6,0 t has -1). The variables analyzed in the experiment they were the chlorophyll tenor in the leaves, of potassium in the pecíolos of the mamoneira, the physical analysis of the soil and the tenors of the present macronutrientes in the leaves of that oleaginous one. The castor oil plant pie, important co-product of the productive chain of the castor beans, for being rich in Nitrogen and Fibers, answered the studied variables positively. The compacta o of the soil affected the absorption of nutrients in the leaves of the plants.