The effects of water stress on crop production and water productivity of two native pepper cultivars (Capsicum spp.) under various drip irrigation regimes in Southwest Nigeria are presented in this study.
The research was carried out in the Teaching and Research Farm of Agricultural and Bio-Environmental Engineering of Federal Polytechnic, Ilaro, Nigeria, during the 2018 and 2019 cropping seasons.
The study used two pepper types (Capsicum chinense and Capsicum frutescens) and four drip irrigation regimes: 100 percent, 75 percent, 50 percent, and 25 percent of actual crop evapotranspiration (ET100, 75, 50, 25) that were duplicated four times in a randomised complete block design (RCBD). In the second year, late in the season, the experiment was repeated. Water was provided 3 weeks after transplanting (WAT), after which growth metrics, crop water productivity, and crop yield were tracked and statistical analyses were performed.
Water productivity, crop yield, and other crop growth metrics such as plant height, number of leaves, fruit length, and weight were all greater for the two pepper types under the ET100 and ET75 irrigation regimes than they were for the ET50 and ET25 irrigation regimes for the two seasons. In all of the treatments, there was a significant difference (p0.05) in the growth metrics. The water productivity components for ET100 and ET75 irrigation regimes, however, did not differ significantly (p>0.05). The ET75 drip irrigation system has the highest water production.
As a result, the ET75 regime was suggested for the two pepper cultivars in order to ensure their long-term cultivation and production in the research region.
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