处理过的生活污水对观赏向日葵作物人工湿地系统养分平衡的影响

Jazmin Del Carmen de la Cruz Magaña, D. Sandri, S. Cajamarca, Daniel Fernando Salas Méndez, Jesus Manuel Perez Clara
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摘要

本研究旨在评估人工湿地(CW)中观赏向日葵灌溉的原水和处理废水(RWW和WW)的营养动态,并与(of)和(WF)无机施肥(RYL)中的淡水(Fw)进行比较。该研究于2019年7月10日至10月2日进行。废水用10kg RYL灌入罐中。在11个样品中,对CW和UnS(未栽培系统)的进水和出水中的盐量进行了评估。该研究还评估了以下方面:株高(PH)、茎粗(SD)、叶片数(NL)、叶面积指数(LAI)、头状花序内径(IDc)、头状花序外径(ODc)、芽中花瓣数(NP)、收获后天数(DAH)、地上部分鲜生物量(FPAP)、地上部分干生物量(DPAP)、头状花序鲜生物量(FPc)、头状花序干生物量(DPc)、地上向日葵营养成分含量、RYL化学成分。连续水对K+、Ca2+和Fe的平均去除率分别为34.33、37.88、39.82和45.40%。播后70 d, WWOF处理的PH (86.54 cm)、SD (11.75 mm)、NL(21)和LAI (3646.73 cm2)均高于WWOF处理。未经施肥处理的废水(WWWF)对P、K、S、B和Mn的吸收量较高。施用肥料的淡水积累了更多的N,而WWOF积累了更多的Zn。废水提高了RYL中P的含量,降低了K+和Ca2+的含量。在连续灌溉条件下,用国产WW灌溉能给土壤提供盐分,并能促进向日葵的生长和品质
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Nutrient balance in a constructed wetland system using treated domestic wastewater on ornamental sunflower crops
This study aimed to assess the nutrient dynamics of raw and treated wastewater (RWW and WW) in constructed wetlands (CW) for the irrigation of ornamental sunflowers, compared to freshwater (Fw) in Red Yellow Latosol (RYL) with (OF) and without (WF) inorganic fertilization. The study was carried out from July 10th to October 2nd of 2019. Wastewater was applied in pots with 10 kg of RYL. The amount of salts in the RWW, influent and effluent of CW and UnS (Uncultivated System), were evaluated in eleven samples. The study also assessed the following: plant height (PH), stem diameter (SD), number of leaves (NL), leaf area index (LAI), the inner diameter of the capitulum (IDc), the outer diameter of the capitulum (ODc), number of petals in the bud (NP), days after harvest (DAH), fresh phytomass in the aerial part (FPAP), dry phytomass in the aerial part (DPAP), fresh phytomass of the capitulum (FPc), dry phytomass of the capitulum (DPc), nutrient content in the aerial sunflower, and chemical composition in the RYL. The average removal efficiency of K+, Ca2+, and Fe in the CW was 34.33, 37.88, 39.82, and 45.40%, respectively. The PH (86.54 cm), SD (11.75 mm), NL (21), and LAI 3646.73 cm2) were higher in the WWOF treatment at 70 days after sowing. Treated wastewater without fertilization (WWWF) presented higher P, K, S, B, and Mn absorption. Freshwater with fertilization accumulated greater amounts of N, and WWOF accumulated greater amounts of Zn. Wastewater increased the P content and decreased K+ and Ca2+ in RYL. Irrigation with domestic WW in CW provided salts to the soil and increased the growth and quality of sunflowers irrigated with Fw
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