Meta-analysis of the Effects of Salinity Stress on Cotton (Gossypium spp.) Growth and Yield in Iran

Abstract

Research on the impact of inputs has a long history in thecountry; however, because of the dispersion and diversity inthe results of various experiments, it is difficult to achieve ageneral conclusion. In this study, a meta-analysis approachhas been used to overcome this problem in order to achievea single result by integrating and re-analyzing the findings ofindependent experiments. For this purpose, scientific articlespublished by researchers of the country regarding the effectof salinity stress on cotton yield were investigated. Articleswere selected so that, in their meta-analysis of data requiredto perform there. The data necessary for the implementationof the meta-analysis is present in them. The results of thisstudy showed that from 1996 to 2017; 15 papers and thesiswere published on the effects of salinity stress on yield, earlymaturing and number of bolls in upland cotton(Gossypiumhirsutum L.). With increasing salinity stress,yield and number of bolls decreased. The standardized valuesfor salinity stress effect on cotton yield were significant in allfive treatments (control via salinity, control via 2-3 dS m-1,control via 4-5 dS m-1, control via 6-7 dS m-1, control via 8-9 dS m-1) compared to control (P