Mitigating toxicity of arsenic in sunflower (Helianthus annuus L.) with phosphate rock and farmyard manure using contrasting soil textures.

IF 3.4 4区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES
Muhammad Awais Piracha, Muhammad Ashraf, Rizwana Kausar, Muhammad Asif, Ali Raza Siddiqui, Syed Ayyaz Javed, Abid Niaz, Zafar Abbas, Shabana Nazeer
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Abstract

Arsenic (As) immobilization in soil using inorganic/organic amendments may improve the productivity of As-contaminated soils. However, the degree of immobilization may vary depending on soil texture, phosphorus and organic matter content. A pot study was designed to investigate the effect of phosphate rock (PR) and farmyard manure (FYM) on As solubility in three soil types (sand, loam and clay), its transfer to plant parts and the resultant impact on physiology and achene yield of Helianthus annuus L. under alkaline calcareous condition. Plants were treated with As (60 and 120 mg kg-1 soil), PR (5 and 20 g kg-1 soil) and FYM (5 and 20% w/w) with a control. After sixteen weeks of growth period, results showed that As solubility decreased by 22.07-44.85% and 21.33-36.35% in sand, 17.55-45.80% and 30.83-45.98% in loam, while 22.81-36.89% and 20.92-42.41% in clay soils at As-60 and As-120, respectively with varied PR+FYM combinations compared to control. Integrated PR+FYM application restricted As movement from soil to plant, reducing achene As concentration by 22.22-41.26%, 26.08-43.47%, and 25.80-45.16% in sand, loam and clay soils, respectively, at As-120 compared to without PR+FYM. Thus, integrated PR+FYM application could be recommended to enhance the productivity of As-contaminated marginal lands by sunflower cultivation.

磷矿和农家肥对向日葵砷毒性的缓解作用。
利用无机/有机改良剂在土壤中固定砷可以提高砷污染土壤的生产力。然而,固定化程度可能因土壤质地、磷和有机质含量而异。采用盆栽试验,研究了在碱性钙化条件下,磷灰石(PR)和农家肥(FYM)对向日葵(Helianthus annuus L.) 3种土壤(砂、壤土和粘土)中砷的溶解度、砷向植株部位的转移及其对向日葵生理和瘦果产量的影响。以As(60和120 mg kg-1土壤)、PR(5和20 g kg-1土壤)和FYM(5和20% w/w)作为对照。生长16周后,不同PR+FYM组合下,As溶解度在As-60和As-120条件下分别比对照降低22.07-44.85%和21.33-36.35%,在壤土中分别降低17.55-45.80%和30.83-45.98%,在粘土中分别降低22.81-36.89%和20.92-42.41%。PR+FYM综合施用限制了As从土壤到植物的移动,在As-120时,与不施用PR+FYM相比,沙土、壤土和粘土中瘦果As浓度分别降低22.22-41.26%、26.08-43.47%和25.80-45.16%。因此,可以推荐PR+FYM综合施用,以提高砷污染边缘向日葵田的生产力。
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来源期刊
International Journal of Phytoremediation
International Journal of Phytoremediation 环境科学-环境科学
CiteScore
7.60
自引率
5.40%
发文量
145
审稿时长
3.4 months
期刊介绍: The International Journal of Phytoremediation (IJP) is the first journal devoted to the publication of laboratory and field research describing the use of plant systems to solve environmental problems by enabling the remediation of soil, water, and air quality and by restoring ecosystem services in managed landscapes. Traditional phytoremediation has largely focused on soil and groundwater clean-up of hazardous contaminants. Phytotechnology expands this umbrella to include many of the natural resource management challenges we face in cities, on farms, and other landscapes more integrated with daily public activities. Wetlands that treat wastewater, rain gardens that treat stormwater, poplar tree plantings that contain pollutants, urban tree canopies that treat air pollution, and specialized plants that treat decommissioned mine sites are just a few examples of phytotechnologies.
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