Soybean is the most important source of protein known to mankind; it is also one of the cheapest and most readily available sources of protein with high nutritional value, similar to animal proteins. Soybean is the first place in the legumes group, because of its high protein content and the fat, lecithin, vitamins and enzymes it contains, and it is hard to find another plant that in such a short time or able to synthesize such a large amount of valuable substances. This paper addresses the influence of mineral fertilization on the protein and oil content of the Felix variety, the ARDS Turda creation. The research was carried out at ARDS Lovrin, on a typical chernozem, in a long-term fertilizing experience. The role of unilateral and combined fertilization with nitrogen and phosphorus was studied. The doses of nitrogen administered were N0, 25, 50, 75, 100 and doses of phosphorus P0, 40, 80, 120, 160. By combining these doses have resulted 25 experimental variants. The obtained results were interpreted by the variant analysis method. The value of the protein increases with increasing fertilizer doses to a certain level after which here is a capping. The lowest percentage of the protein is recorded in the control, unfertilized variant, 32.4%, and the highest by the combined application of the two types of fertilizer, in the variant N75P120 - 41.4%. The study of the fat content in the Felix variety revealed that the best results were obtained under the conditions of the interaction between the two studied macroelements, with the highest recorded value of 20.15%. Analyzing the results we can state that the percentage of protein and oil increase with increasing doses of nitrogen administered, are relatively constant in case of unilateral application of phosphorus and achieves the highest values for the combined application of nitrogen and phosphorus.

soybean, protein, oil content, fertilization.

field crops and pastures

Presentation: poster