IMPACT OF FOLIAR FERTILIZATION ON PRODUCTIVITY OF NEW INTRODUCED CULTIVARS OF PADDY RICE

Abstract

The interest to the introduced rice cultivars (Oryza sativa L.) is explained by the
search for more suitable varieties with good adaptability and high yield to be
grown under the agro-climatic conditions in Bulgaria. The new foliar treatment
products on the market - Folur, Amalgerol and Lithovit, have also provoked our
interest. The survey was carried out in 2013 - 2015, applying the two-factor field
experiment following the split plot method. Two Turkish - Osmanchik 97 and
Gala, along with four Italian cultivars – Lince, Cameo, Puma and Brio were set as
factor one. The foliar product Folur (2 l/da), Amalgerol (1.2 l/da) and Lithovit
(0.300 kg/da) were set as factor two. The following factors were studied:
phenological development of the cultivars, productive tillering capacity and yield.
It has been specified that Osmanchik 97 and Gala had a shorter vegetative period.
Lince stood out against the 6 tested cultivars by highest tillering results – 4.70
number of tillers/plant and was sharply outlined from the standard – Osmanchik
97, Puma and Brio. The tested products Folur and Lithovit had proven their effect
on the formation of more productive tillering capacity – by 7.7% and 13.1%
respectively. The highest yield was observed with Cameo (954.5 kg/da) and Brio
(949.1 kg/da), which surpassed the Osmanchik 97 (control) by 8.6% and 8%
respectively. The Amalgerol treatment proved to have the strongest positive impact
on productivity and increased the average yield of the tested cultivars by 11.3%.