Influence of fertigation on some factors determining quality in variety of tomatoes “Nikolina F1”
Keywords:
tomatoes, field production, soil moisture, fertilizing, biochemical parametersAbstract
A field trial on a cinnamonic forest soil with an experimental crop - an average early tomato variety “Nikolina F1” was carried. As factors in the study were included 50 and 100% irrigation rates and increasing rates with mineral fertilization: N15P8K15; N20P12K20 and N25P16K25. The influence was established of irrigation and fertilization rates on some quality indicators. The results obtained showed a higher content of dry matter, total sugars and total dyes in fruits obtained at reduced irrigation rate, than that at 100% irrigation rate. In contrast to the ascorbic acid and the total acid where higher average contents were recorded in biological optimal irrigation rate. In both irrigation norms contents of dry matter and total acids increased with increasing the fertilizer rate. For common sugars and ascorbic acid at the higher irrigation rate, the vitamin C content increased along with fertilizer norms, and the lower irrigation rate was inversely proportional. In the experience, there were no legal differences in the content of common dyes and lycopene depending on the increase in the fertilizer rate.
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