Impact of different fertilization systems on the content of total, protein and nonprotein nitrogen in plants cultivated in crop rotacion on typical chernozem | Impactul diferitor sisteme de fertilizare asupra continutului azotului total, proteic si neproteic al plantelor cultivate in asolament pe cernoziom tipic
2013
Bizgan, I., Academia de Stiinte a Moldovei, Chisinau (Republic of Moldova). Inst. de Genetica, Fiziologie si Protectie a Plantelor
The aim of our researches was to compare the impact of two fertilization systems on the concentration of total, protein and nonprotein nitrogen in plants. The researches were performed based on a long-term experiment established on a plot (typical chernozem) with six-field rotation. Three crops were selected for study: corn for grain (Zea mays L.), sugar beet (Beta vulgaris) and winter wheat (Triticum durum). Since 1991, the following fertilization systems were used on this land: 1)mixed use of mineral and organic fertilizers (NPK 75, 130, 175 kg/ha and farmyard manure 10 and 15 t/ha); organic fertilizers (manure) - 15 t/ha; 3) control variant - without fertilizers. The following chemical parameters of plants were studied: total nitrogen and non-protein nitrogen which were determined by photometric indophenol method and also protein nitrogen which was determined by the difference between total nitrogen and non-protein nitrogen. It was found that sugar beet and winter wheat recorded significantly higher values for these indices as a result of mineral and organic fertilizers administration, while in the case of corn as a result of manure use.
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