I. MITOVA, N. DINEV and V. VASSILEVA
“N. Poushkarov” Institute of Soil Science, Agrotechnologies and Plant Protection, BG - 1080 Sofia, Bulgaria
MITOVA, I., N. DINEV and V. VASSILEVA, 2014. Effects of mineral and organic fertilization on early potato production. Bulg. J. Agric. Sci., 20: 1182-1188
The objective of the study was to establish the influence of organic, mineral and organic-mineral fertilization on the growth, development, yield and some quality indicators for early potatoes. A field experiment in crop rotation with early potatoes of the sort Agata was staged on alluvial-meadow soil in 2011-2012. The scenario included a regime without fertilizer, a regime with mineral fertilizer, organic fertilizer (manure) and mixed organic and mineral fertilizer. The highest yield in the conducted experiment (32.42 t.ha-1) was obtained under the mixed fertilization regime. The plants under the regime with organic fertilizer showed lower biometric indicators as compared to those fertilized with mineral or organic-mineral fertilizers. As regards quality indicators, the biggest tubers (101.42 g/tuber) were obtained under the mixed fertilization regime with high content of total sugars - 5.1% and low content of nitrates - 49.79 mg.kg-1.