EFFECT OF DIFFERENT CONCENTRATIONS OF KELPAK BIOREGULATOR ON THE FORMATION OF ABOVE-GROUND BIOMASS COCKSFOOT
 
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Departament of Grassland and Green Areas Creation, University of Natural Sciences and Humanities in Siedlce, ul. B. Prusa 14, 08 -110 Siedlce, Poland
Publish date: 2013-01-15
 
J. Ecol. Eng. 2013; 14(1):48–52
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ABSTRACT
Studies with growing cocksfoot (cv. Amila) were performed in polyurethane ring with a diameter of 36 cm and a height of 40 cm, which were dug to a depth of 30 cm and filled with soil material. As the experimental factor the trade name of bioregulator Kelpak SL was used, which includes natural plant hormones (auxin and cytokinin). The following aqueous solutions of growth regulator were used: 20, 40, and 60% and control (no preparation). Kelpak were applied to all three regrowth in the form of spray at a dose of 3cm3•ring-1 in the shoots elongation phase of the grass. The full use of experimental objects was in 2011-2012. At that time, the detailed study include aboveground biomass yield (g DM•ring-1), leaf length (cm), width of the base of the leaf blade (cm), leaf greenness index (SPAD). On the basis of morphological leaf characters the ratio of leaf blade shaping and the ratio of their surface were calculated. The study showed a significant influence of growth regulator on the development of aboveground biomass of cocksfoot. The greatest effect was obtained with the use of sprays of solutions with a concentration 40 and 60%.