Nutritive interactions due to mineral fertilization and their influence on maize yield quality
1986
Hera, C. | Idriceanu, A. | Dobrescu, E. | Mihaila, V. | Rusu, P. (Institutul de cercetari pentru cereale si plante tehnice, Fundulea (Romania)) | Chardas, G. | Pattakou, V.
Within the Greek-Romanian cooperation programme trials were carried2048out concerning the influence of N and P fertilizers application on the mineral nutrition of maize hybrids cultivated in similar experimental variants, both at the Fundulea Institute and at the Pedology Institute in Lycovrissy-Athens. Nitrogen rates were applied in doses of 50 kg to 200 kg N/ha, while phosphorus rates in doses of 40 kg to 160 kg P2O5/ha. Nitrogen-phosphorus interaction has determined the increase of protein percentage in the maize grains and has led to the achievement of high protein quantities in the yield. The changes of the protein percentage were accompanied by variations, within reduced limits, of the essential amminoacids lysine and triptophan. On various phosphorus basal dressings the maximum lyzine and triptophan content was obtained with the application of 50 kg N active ingredient/ha to the hybrid cultivated at Fundulea, under non irrigation, and of 100 kg N active/ha to the hybrid cultivated in Greece, under irrigation. The analysis of maize plants during 3-4 leaves stage has showed that the zinc concentration decreases (without reaching the minimum limit) when the phosphorus dose increa
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