Published in Scientific Papers. Series B, Horticulture, Vol. LXVIII, Issue 1
Written by Katya DIMITROVA, Yordanka KARTALSKA, Nikolay PANAYOTOV
The study estimated the effect of biostimulant Protifert LN 6.5, with either foliar or soil treatment at three different doses - 1%, 2%, and 3% on the epiphytic and rhizosphere microflora of pepper seedlings of two varieties - Kurtovska kapia 1619 (KK) and Bulgarski rоtund (BR). Irrespectively of the type of treatment, the higher number of epiphytic and rhizosphere bacteria was observed when the biostimulant was applied at dose of 2% but the effect was dependent on the pepper variety. Analysis showed that the type of treatment significantly affected only the microflora in the area of application. The doses of 1% and 3% did not affect the number of bacteria and in general, the estimated values was lower than those for control plants. The beneficial effect of biostimulants based on amino acids is related to improvement of nutrients absorption and the mineralization of organic matter which can increase soil microorganisms abundance. Further research can focus on mechanism of action of biostimulants and their specific effects on plant growth and productivity and on microflora.
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