Influence of new biological active substances in cotton
Minka Koleva
Field Crops Institute –Chirpan, 6200, Chirpan, Bulgaria
Резюме
During 2016-2018 on the experimental field of Field Crops Institute in Chirpan
was carried experiment with cotton cultivar „Chirpan–539”. Were tested five new
biological substances applied in a phase of flowering cotton. All investigated
substances lead to an increase in yield. Especially stimulators XAR1 and NOX in
dose 300 ml/da showed equal effects on yield and yield components in the following
aspects: increased with 20,1% and 19,2% the total yield of cotton, increased with
7,4% and 4,6% the boll weight and increased with 11.5% and 4,6% bolls per plant,
respectively. Conditions of the years have the most influence on yield – 83,9 %, the
tested substances have less influence – 5,4 %.
Key words: Cotton, Biological active substances, Yield
