Abstract:

This study was carried out to determine the effects of different water stress levels on the vegetative and generative properties of cotton (Gossypium hirsutum L.) and the effects of foliar sulfur applications on the elimination of the effect of water stress. In the experiment, the effects of foliar applied sulphur [non sulphur (S0) together with 150 ml da-1(S1), 250 ml da-1 (S2) and 350 ml da-1(S3)] under three different irrigation levels (I100, I66, I33, I0) of available soil water capacity was investigated. Evapotranspiration (Et) decreased slightly in the first year and increased in the second year as the sulfur doses increased. Sulfur doses caused a polynomial increase in biomass in the first year and in LAI in the second year. The redness length on the main branch increased linearly as water stress increased. When compared to control treatment, increasing irrigation water resulted increase in total dry matter, plant length and leaf area index by 112-49%, 46-64 %, 56-360%. The same values for the first and second year were found to be 14-4%, 0.80-28% and 10-12% when compared to those of S0. The period from combing to the period when the first flower is seen is the most important development period affecting the yield parameter. It has been observed that the most sensitive period to drought is the flowering period. Although the foliar application of sulfur increased the chlorophyll content, it did not have a significant effect on vegetative and generative properties.

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