The synthetic growth regulators Mival and Moddus 250 ME in potato cultivation
Part II. The influence of growth regulators on structure of the tuber yield
Barbara Sawicka
Katedra Szczegółowej Uprawy Roślin, Akademia Rolnicza, Lublin (Poland)
Abstract
The effect of growth regulators on the structure of potato tubers yield was evaluated in field experiment carried out in 1993–1995 on podsoloic soil derived from light loam in Parczew. The experiment was designed as sub-blocks in inter-related system, with three replications. The first class factor were growth regulators (Mival at concentration of 0.05%, Moddus ME — 0.2% and distilled water as a control), the second class factor were two date of application of growth regulators (before planting and before flowering) and third class factor composed of five potato cultivars (Drop — very early, Perkoz — early, Irga — medium early, Grot — medium late and Elba — late) Manuring and mineral fertilization were applied at the rate of 100 kg N, 100 kg P2O5, 150 kg K2O and 250 dt·ha-1 of farm manure. Growth regulators contributed to the decrease of weight share of tubers 3–4 cm in diameter with simultaneous increase of tubers 4–5 cm and >6 cm in diameter in total yield. Additionally, applied growth regulators caused increase of number and weight of tubers per plant and seed potato yield in comparison with control.
Keywords:
cultivars, date of applications, growth regulators, potato, structure, yield of tubersReferences
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Authors
Barbara SawickaKatedra Szczegółowej Uprawy Roślin, Akademia Rolnicza, Lublin Poland
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