14. Influence of Soil Drought during Flowering-Boll Formation Stage on the Productivity of Three Cotton Cultivars

Author: Minka Koleva, Andon Vassilev

DOI: 10.22620/agrisci.2010.04.014


The influence of drought during the flowering-boll formation stage on the productivity of three cotton cultivars – Helius, Avangard-264 and Chirpan-539 was studied. It was established that soil drought at the rate of 35-40% of the field water capacity (FWC) suppressed the growth, caused falling off of the formed bolls and reduced both the number and weight of bolls. The average reduction of the productivity was in the range of 23-35%. No significant cultivar differences regarding tolerance to drought were established.