Kammoun Mariem, Ghorbel Imen, Charfeddine Safa, Kamoun Lotfi, Gargouri-Bouzid Radhia, Nouri-Ellouz Oumèma
Laboratoire d'Amélioration des Plantes et Valorisation des Agro-resources, Ecole Nationale d'Ingénieurs de Sfax, Route Soukra Km 4, B.P 1173, 3038, Sfax, Tunisia.
Laboratoire d'Amélioration des Plantes et Valorisation des Agro-resources, Ecole Nationale d'Ingénieurs de Sfax, Route Soukra Km 4, B.P 1173, 3038, Sfax, Tunisia.
J Environ Manage. 2017 Sep 15;200:475-483. doi: 10.1016/j.jenvman.2017.06.016. Epub 2017 Jun 13.
The production of phosphoric acid from phosphate rock leads to an industrial by-product called phosphogypsum (PG). One ton of phosphoric acid generates 5 tons of PG that is frequently stocked near the production units. Several attempts were made to test PG valorization via soil amendment because of its phosphate, sulphate and calcium content. In this study, the use of PG in composting was envisaged. Composts were produced by mixing olive oil wastes and spent coffee grounds. Two concentrations of PG, 10% (A) and 30% (A), were tested in composting substrate in addition to control compost without PG (A). After 8 months of fermentation, the resulting composts were used in field experiments using nine different treatments conducted to evaluate the potential use of these PG-containing composts in potato plant (cv. Spunta) cultivation. Plants were grown in the field and the different composts (A, A and A) were added as fertilizer and compared to commercial compost and cattle manure. During the culture period, a number of physiological (dry weight, chlorophyll content, tuber yield) and biochemical parameters (antioxidant activities, mineral content, starch and protein content) were followed. Similarly, chlorophyll content was measured in plants cultivated on commercial or PG supplemented composts. An increment of 55.17% in potato yield was recorded with the use of A the compost. Collectively, these data reveal the positive impact of the addition of PG in composting which may be adopted as a strategy for PG valorization and its use for the production of high quality edible products.
由磷矿石生产磷酸会产生一种名为磷石膏（PG）的工业副产品。生产一吨磷酸会产生5吨磷石膏，这些磷石膏通常堆放在生产单位附近。由于其含有磷、硫酸盐和钙，人们多次尝试通过土壤改良来测试磷石膏的增值利用。在本研究中，设想了在堆肥中使用磷石膏。堆肥是通过将橄榄油废料和咖啡渣混合制成的。除了不含磷石膏的对照堆肥（A）外，还在堆肥基质中测试了两种磷石膏浓度，即10%（A）和30%（A）。经过8个月的发酵，将所得堆肥用于田间试验，设置了九种不同处理，以评估这些含磷石膏堆肥在马铃薯（品种Spunta）种植中的潜在用途。植株在田间生长，将不同的堆肥（A、A和A）作为肥料添加，并与商业堆肥和牛粪进行比较。在种植期间，跟踪了一些生理参数（干重、叶绿素含量、块茎产量）和生化参数（抗氧化活性、矿物质含量、淀粉和蛋白质含量）。同样，对在商业堆肥或添加了磷石膏的堆肥上种植的植株测量了叶绿素含量。使用A堆肥时，马铃薯产量提高了55.17%。总体而言，这些数据揭示了在堆肥中添加磷石膏的积极影响，这可作为磷石膏增值利用及其用于生产高质量可食用产品的一种策略。
