| Autor: |
Venâncio JB; Center for Agrarian Sciences, Federal Rural University of the Semi-Arid Region, Mossoró 59625-900, Brazil., Dias NDS; Center for Agrarian Sciences, Federal Rural University of the Semi-Arid Region, Mossoró 59625-900, Brazil., Medeiros JF; Center for Agrarian Sciences, Federal Rural University of the Semi-Arid Region, Mossoró 59625-900, Brazil., Morais PLD; Center for Agrarian Sciences, Federal Rural University of the Semi-Arid Region, Mossoró 59625-900, Brazil., Nascimento CWAD; Department of Agronomy, Federal Rural University of Pernambuco, Recife 52171-900, Brazil., Sousa Neto ON; Department of Engineering, Federal Rural University of the Semi-Arid Region, Angicos 59515-000, Brazil., Andrade LM; Center for Agrarian Sciences, Federal Rural University of the Semi-Arid Region, Mossoró 59625-900, Brazil., Pereira KTO; Center for Agrarian Sciences, Federal Rural University of the Semi-Arid Region, Mossoró 59625-900, Brazil., Peixoto TDC; Center for Agrarian Sciences, Federal Rural University of the Semi-Arid Region, Mossoró 59625-900, Brazil., Rocha JLA; Center for Agro-Food Science and Technology, Federal University of Campina Grande, Pombal 58840-000, Brazil., Ferreira Neto M; Center for Agrarian Sciences, Federal Rural University of the Semi-Arid Region, Mossoró 59625-900, Brazil., Sá FVDS; Center for Agrarian Sciences, Federal Rural University of the Semi-Arid Region, Mossoró 59625-900, Brazil. |
| Abstrakt: |
Salt stress during pre-harvest limits the shelf life and post-harvest quality of produce; however, silicon nutrition can mitigate salt stress in plants. Thus, we evaluated the effects of salinity and fertilization with Si, in pre-harvest, on the morpho-physiological characteristics of onion bulbs during shelf life. The experiment was set up in randomized complete blocks, with treatments arranged in split-split plots. The plots had four levels of electrical conductivity of irrigation water (0.65, 1.7, 2.8, and 4.1 dS m -1 ). The subplots had five fertilization levels with Si (0, 41.6, 83.2, 124.8, and 166.4 kg ha -1 ). The sub-sub plots had four shelf times (0, 20, 40, and 60 days after harvest). Irrigation water salinity and shelf time reduced firmness and increased the mass loss of onion bulbs during shelf life. Salt stress reduced the contents of sugars and total soluble solids of onion bulbs during storage; however, Si supply improved the contents of these variables. Salinity, Si supply, and shelf time increased the concentrations of pyruvic and ascorbic acids in onion bulbs during shelf life. Si doses between 121.8 and 127.0 kg ha -1 attenuated the impacts caused by moderate salinity, increasing the synthesis of metabolites and prolonging the onion bulbs' shelf life. |
