The research was carried out between 2019 and 2021 in the Bozovici Depression, Pătaș territory, located in the west of the country. The climate of the area is characterized by average annual temperatures between 9 - 100C, with not too hot summers and moderately harsh winters. The multiannual average of atmospheric precipitation varies between 670 – 750 mm. The soil type was eutric semicarbonate alluviosol. The texture is coarse sandy loam between 0-120 cm, the soil reaction is slightly alkaline with pH-7.6, the humus content 2.72%, the nitrogen index (IN) 2.66, the degree of saturation in bases 97.7 %. The effect of variable doses of nitrogen applied on a constant background of phosphorus and potassium administered alone and on backgrounds of manure and green manures was investigated. The synthesis results of the 3 experimental years show that on average the 4 gradations of the nitrogen dose (N100, N120, N140, N160), applied on a constant background of P90K90 gave a harvest of 24,676 kg/ha tubers. In the variant in which the same doses of mineral fertilizers were applied on a basis of 20 tons/ha of manure, the harvest was 28,833 kg/ha tubers, so higher by 16%, respectively the increase in the harvest was 4157 kg/ha Ha. In the variant in which fertilization was done with the same doses of mineral fertilizers, but on the basis of green fertilizers, the increase was only 10%, respectively 2487 kg/ha. On average over the 3 graduations, fertilization only with mineral fertilizers, the fund in which mineral fertilizers were applied together with manure and respectively with green fertilizers, nitrogen fertilizers increased the yield by 10% compared to the N100 variant in the N120 variant, by 20% in the N140 variant and by 35% in the N160 variant. The yield differences were assured as very significant. The paper also covers the evolution of starch content and production.

potato, organomineral fertilization

agronomy

Presentation: poster