Abstract
ABSTRACT Indication of salt-tolerant cotton cultivars can make the agricultural exploitation with saline water irrigation feasible in the Brazilian semi-arid region. Thus, this study aimed to evaluate the gas exchanges and growth of cotton cultivars irrigated with saline water. The study was conducted in pots adapted as drainage lysimeters under greenhouse conditions, using a sandy loam Entisols as substrate. Treatments were distributed in completely randomized design, in 5 x 2 factorial arrangement, relative to five levels of irrigation water electrical conductivity - ECw (1.5, 3.0, 4.5, 6.0 and 7.5 dS m-1) and two cotton cultivars (BRS 368 RF and BRS Safira). Increase in irrigation water salinity inhibits the vegetative growth and gas exchanges of the cotton cultivars BRS Safira and BRS 368 RF. Leaf area and instantaneous carboxylation efficiency are the most affected variables. Physiological and growth performance of the cultivar BRS Safira in response to water salinity was higher than that of BRS 368 RF.
Highlights
Cotton cultivation has presented itself as an agricultural activity of considerable socioeconomic importance, especially for the Brazilian agribusiness, with an estimated production of 1,789 t ha-1 for the 2017/18 season
In both irrigation water and soil, salts can compromise the agricultural exploitation with economic viability, because they cause osmotic, toxic and nutritional effects, limiting plant growth and production, besides leading to degradation in soil physical structure when the concentration of adsorbed sodium prevails over those of other cations (Tavares Filho et al, 2012)
This study aimed to evaluate the gas exchanges and growth of two cotton cultivars irrigated with saline water
Summary
Cotton cultivation has presented itself as an agricultural activity of considerable socioeconomic importance, especially for the Brazilian agribusiness, with an estimated production of 1,789 t ha-1 for the 2017/18 season. Increase in irrigation water salinity inhibits the vegetative growth and gas exchanges of the cotton cultivars BRS Safira and BRS 368 RF.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Revista Brasileira de Engenharia Agrícola e Ambiental
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
