Journal
HORTICULTURAE
Volume 8, Issue 7, Pages -Publisher
MDPI
DOI: 10.3390/horticulturae8070564
Keywords
clay soils; deficit irrigation; magnetic water; osmoregulants; salinity; water relationships
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Funding
- King Khaled University [RGP2/67/43]
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The use of magnetized water and proline can significantly improve the growth and yield of pomegranate shrubs in saline clay soils, reducing fruit cracking and improving fruit quality.
Water scarcity is becoming a global problem. The shift from traditional irrigation systems to deficit irrigation increased soil salinity, particularly in clay soils. The use of magnetized water (MW) and biostimulants can induce plant resistance to drought and salinity stress. To assess the role of MW and proline (P) on 'Taifi' pomegranate shrubs' growth, productivity, and fruit quality under such conditions, a split-plots experiment was conducted for two seasons using three irrigation levels (100%, 75%, and 50%), based on the crop water requirements (CWR), and four treatments including foliar spray of tap water (control) and P, irrigation with MW, and MW + P. The most pronounced effect was referred to MW + P at 75% CWR that improved shrubs' chlorophyll content and nutritional status, reduced endogenous proline content, and enhanced vegetative growth with minimum consumptive water use (CWU), optimum water use efficiency (WUE), maximum water productivity (WP), utmost yield and average fruit weight, lowest percentage of fruit cracking, and fairly good total soluble solids (TSS), vitamin C and anthocyanin contents. Overall, MW + P at 75% CWR improved the resistance mechanism of pomegranate shrubs in saline clay soils, plus improving the growers' net profit. MW generally reduced soil salinity, expressed as reduced pH, EC, Na+, and Ca2+ values.
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