Desempenho agronômico de cultivares de cebola sob diferentes tensões de água no solo
Alternative titleAgronomic performance of onion cultivars under different soil water tensions
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This work aimed to evaluate the development of five onion cultivars with drip irrigation, submitted to different water tension limits in the soil, in the Lower Basin of the São Francisco River region. The experiment was conducted in the experimental field of the DTCS/UNEB, in Juazeiro, BA, in the period from April to September 2013. Experimental delineation was adopted, in random blocks in a subdivided plot scheme, with five repetitions. The treatments were composed of three tensions for the soil water limit in the plots, at 20, 40 and 50 kPa and five onion cultivars in subplots Atacama, 1206, Predileta, Serena, and Vale Ouro IPA-11. The variables analyzed were total productivity, commercial productivity, efficiency of the use of water, soluble solid content, titratable acidity, average bulb weight, and dry matter content of commercial bulbs. Cultivars Serena and Vale Ouro IPA-11 presented better answers regarding the characteristics of total and commercial productivity. The water tension limit in the soil of 20 kPa provided the best agronomic performance among the cultivars evaluated.