Water consumption, productivity and quality of onion under different irrigation management in organic cultivation
Journal Title: Revista Verde de Agroecologia e Desenvolvimento Sustentável - Year 2017, Vol 12, Issue 3
Abstract
Productivity and quality of onion bulbs dependent on the amount of water applied to culture. The objective of this work was to determine the water consumption, productivity and quality of onion under different irrigation management in organic farming. The experiment was developed an under randomized block, with three treatments and seven repetitions. The treatments consisted: T1 - irrigation made based on daily data of crop evapotranspiration (ETc); T2 - irrigation based on Kc values proposed in the literature (Kc-lit) for onion and ETo obtained by the TCA method; and T3 - irrigation based on the Kclit values and the ETo obtained by the FAO method. The water consumption of the crop (ETc) was obtained through daily measures evapotranspirometers. The reference evapotranspiration (ETo), obtained by the methods of the class A pan (TCA) and Penman-Monteith (FAO). The following variables were evaluated: bulb diameter, mean bulb mass, total and commercial productivity, soluble solids, titratable acidity and pungency. ETc varied from 3.9 mm d-1 (stage I) to 5.8 mm d-1 (stage III), reaching maximum daily rates of up to 7.2 mm d-1 and total for the crop cycle, 563.4 mm. Different irrigation management, did not produce significant changes in total productivity of onion grown in organic system, with an average value for the different managements, around 15 t ha-1 . The environmental conditions verified during the experimental period, with high temperatures, certainly were determinant for bulbs of pungent onion and with low acidity
Authors and Affiliations
Adheilton Rogers Pilé de Carvalho, Mário de Miranda Vilas Boas Ramos Leitão, Gertrudes Macário de Oliveira, Irai Manuela Santana Santos, Jairton Fraga Araújo
Keywords
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- EP ID EP253956
- DOI 10.18378/rvads.v12i3.4430
- Views 109
- Downloads 0
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