Cattle Manure Alters the Soil Nutritional Status and Soybean Yield (Glycine max L. Merr.)

Soybean is one of the most important crops globally, despite significant numbers the crop in the Cerrado biome presents low natural fertility with a higher demand for fertilization. Seeking to improve the production of culture by reducing costs there is the possibility of using organic waste, which can be a very advantageous and interesting option when well used. The objective of this work was to evaluate the physiological, nutritional, and productive aspects of soybean crops grown with cattle manure associated with chemical fertilizers. The experimental design was in randomized blocks with eight replications (4 for destructive analyses and 4 for grain harvesting). The treatments were composed of 5 doses of cattle manure (0.0, 2.5, 5.0, 10.0, and 20.0 t ha-1) and control treatment (Control) without fertilization, without the use of manure and mineral fertilizer. The cattle manure provided a positive increase in the increase of levels of Ca, Mg, M.O, P, K, Fe, Zn and in the characteristics of plant height, stem diameter, soybean node number, dry weight of shoot, Falker chlorophyll index, root length and dry weight of root. The dose of 20.0 t ha-1 was the best response dose for soil nutritional conditioning for both physical and chemical characteristics, with an average increase of 68.26% in a comparison with only the use of conventional mineral fertilization.