Abstract
Improving the chemical and physical properties of saline soils is crucial for the sustainable production of sugar beet and efficient processing of beet sugar. Here, the impacts of the application of treated filter cake on sugar beet biofortification under saline soil and sugar losses into molasses during beet sugar processing were evaluated for the first time. The application of treated filter cake significantly reduced K%, Na%, and α-amino-N while enhanced sucrose content and quality index of beet root juice. Consequently, sugar loss percentage, sugar loss yield, and relative sugar loss yield were reduced, whereas recoverable sugar yield was enhanced. Linear regression analysis revealed that quality index and sugar loss yield were increased, whereas sugar loss percentage and relative sugar loss yield were reduced in response to the reduction of soil Na+ content accompanied with increasing Ca2+ content in the soil increased. The results provide treated filter cake as a promising amendment for saline soil remediation for improving biofortification of sugar beet and reducing sugar losses during beet sugar processing.
Highlights
Cultivation of sugar beet (Beta vulgaris, L.), one of the most salt-tolerant crops (Kaffka and Hembree 2004, Kaffka, et al 2005, Lv, et al 2019), in the tropical and subtropical countries is growing rapidly as an important component of the sugar industry
Linear regression analysis revealed that quality index and sugar loss yield were increased, whereas sugar loss percentage and relative sugar loss yield were reduced in response to the reduction of soil Na + content accompanied with increasing Ca 2+ content in the soil increased
The results provide treated filter cake as a promising amendment for saline soils remediation for improving biofortification of sugar beet and reducing sugar losses during beet sugar processing
Summary
Cultivation of sugar beet (Beta vulgaris, L.), one of the most salt-tolerant crops (Kaffka and Hembree 2004, Kaffka, et al 2005, Lv, et al 2019), in the tropical and subtropical countries is growing rapidly as an important component of the sugar industry. The uptake of more sodium by sugar beet roots increases the level of impurities in the beet root juice, and its quality is decreased (Draycott &Christenson 2003) It is of great importance for promoting sugar beet cultivation and production of sugar beet in saline soils dominating subtropical and tropical regions to improve the physical and chemical properties of such soils. The current study hypothesizes that because of its high calcium content, treated filter cake could effectively enhance sugar beet biofortification and reduces sugar losses into molasses during beet sugar processing. The current study was carried out to; i) convert the filter cake from an environmentally harmful byproduct to a useful material could be successfully applied for remediation of saline soils, and ii) evaluate the impact treated filter cake applied as a soil amendment on the quality of beet root juice and sugar losses during the processing of sugar beet under the saline soil condition
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