SEED COTTON YIELD AND YIELD COMPONENTS AFFECTED BY THE MINERAL FERTILIZATION AND THE WEATHER CONDITIONS

Published in Scientific Papers. Series A. Agronomy, Vol. LXV, Issue 1
Written by Angelina MUHOVA, Stefka STEFANOVA-DOBREVA

The aim of the study was to determine the reaction of cotton to different fertilizer rates and combinations under the influence of different weather conditions. In 1966 a long-term stationary fertilizer experience was established at the Field Crop Institute in Chirpan, Bulgaria. The results represent 2019 and 2020 crop years. The experiment was based on two-field crop rotation. Cotton variety Philipopolis was grown with durum wheat, without irrigation. The following doses of nitrogen and phosphorus were applied: 40, 80, 120 and 160 kg ha_-1. Potassium fertilizer was used at a rate of 80 kg ha. N₀P₀K₀ was adopted as a control. N₁₆₀P₄₀ had the greatest effect on seed cotton yield and boll weight; N₁₆₀P₈₀ - lint yield and ginning; N₁₆₀P₁₂₀ - plant height; N₁₂₀P₁₂₀ - number of boll per plant and N₄₀P₈₀ - fiber length. The strongest correlation was observed between lint yield and ginning (P = 0.902***), and fiber length was negatively related to all traits. Yield and yield components can be strongly influenced by different weather conditions.

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{simplepopup popup="false" name="Citation64"}MUHOVA A., STEFANOVA-DOBREVA S. 2022, SEED COTTON YIELD AND YIELD COMPONENTS AFFECTED BY THE MINERAL FERTILIZATION AND THE WEATHER CONDITIONS. Scientific Papers. Series A. Agronomy, Vol. LXV, Issue 1, ISSN 2285-5785, 440-446. {/simplepopup}