Jiaxiang Gong , Nan Chen , Chuanping Feng , Ning An , Yeping Li , Yongheng Zhan , Yang Yue , Shuang Liu
{"title":"Exploring the role of sewage phosphorus-recycling ceramsite in promoting hydroponic growth of narcissus: Mechanistic insights","authors":"Jiaxiang Gong , Nan Chen , Chuanping Feng , Ning An , Yeping Li , Yongheng Zhan , Yang Yue , Shuang Liu","doi":"10.1016/j.scienta.2025.114005","DOIUrl":null,"url":null,"abstract":"<div><div>Adsorption methods are widely applied in the field of sewage treatment, particularly concerning, the disposal of adsorbents as solid wastes, which has attracted considerable attention. One potential approach is to harmlessly utilize these materials as substrates for soilless cultivation. Nevertheless, the effects on plant growth and the underlying mechanisms of using sewage adsorbent-recycling materials as soilless cultivation substrates remain unclear. Clarifying these aspects is crucial for assessing the feasibility of reusing adsorbent-recycling materials. This study conducted soilless cultivation experiments on narcissus using phosphorus-recycling ceramsite (PC) after adsorption treatment of phosphorus-containing sewage to investigate its impact on plant growth. The results indicated that compared to commercial ceramic granules and control experiments, PC significantly promoted the growth of narcissus. Specifically, the average leaf lengths of narcissus in PC cultivation were 1.77- and 1.40-fold longer than in the control and commercial ceramic granule treatments after 30 d, respectively. The effects and contributions of various hydroponic solution indicators were assessed through Mantel analysis, Spearman correlation analysis, and random forest algorithm. The findings confirmed that phosphorus content and pH in the hydroponic solution had a substantial impact on narcissus growth (<em>p</em> < 0.01). Additionally, bioactive substances in the hydroponic solution were detected by three-dimensional fluorescence excitation-emission spectroscopy (3D-EEM) and LC-MS. In summary, the mechanisms by which PC promotes narcissus growth primarily include: environmental stress on roots was reduced by PC by providing essential mineral elements and phosphorus to the hydroponic solution while mitigating pH decline; the accumulation of autotoxic substances such as cinnamic acid and apoptosis-inducing substances like stachyose in the hydroponic solution is inhibited, while the production of growth-promoting substances is enhanced; microbial content in the hydroponic solution is reduced to minimize toxicity and competitive effects. This study not only proposes new insights into the mechanism of hydroponic substrates affecting narcissus growth but also offers new perspectives for the harmless reuse of adsorbed solid waste.</div></div>","PeriodicalId":21679,"journal":{"name":"Scientia Horticulturae","volume":"341 ","pages":"Article 114005"},"PeriodicalIF":4.2000,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Scientia Horticulturae","FirstCategoryId":"97","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0304423825000561","RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"HORTICULTURE","Score":null,"Total":0}
引用次数: 0
Abstract
Adsorption methods are widely applied in the field of sewage treatment, particularly concerning, the disposal of adsorbents as solid wastes, which has attracted considerable attention. One potential approach is to harmlessly utilize these materials as substrates for soilless cultivation. Nevertheless, the effects on plant growth and the underlying mechanisms of using sewage adsorbent-recycling materials as soilless cultivation substrates remain unclear. Clarifying these aspects is crucial for assessing the feasibility of reusing adsorbent-recycling materials. This study conducted soilless cultivation experiments on narcissus using phosphorus-recycling ceramsite (PC) after adsorption treatment of phosphorus-containing sewage to investigate its impact on plant growth. The results indicated that compared to commercial ceramic granules and control experiments, PC significantly promoted the growth of narcissus. Specifically, the average leaf lengths of narcissus in PC cultivation were 1.77- and 1.40-fold longer than in the control and commercial ceramic granule treatments after 30 d, respectively. The effects and contributions of various hydroponic solution indicators were assessed through Mantel analysis, Spearman correlation analysis, and random forest algorithm. The findings confirmed that phosphorus content and pH in the hydroponic solution had a substantial impact on narcissus growth (p < 0.01). Additionally, bioactive substances in the hydroponic solution were detected by three-dimensional fluorescence excitation-emission spectroscopy (3D-EEM) and LC-MS. In summary, the mechanisms by which PC promotes narcissus growth primarily include: environmental stress on roots was reduced by PC by providing essential mineral elements and phosphorus to the hydroponic solution while mitigating pH decline; the accumulation of autotoxic substances such as cinnamic acid and apoptosis-inducing substances like stachyose in the hydroponic solution is inhibited, while the production of growth-promoting substances is enhanced; microbial content in the hydroponic solution is reduced to minimize toxicity and competitive effects. This study not only proposes new insights into the mechanism of hydroponic substrates affecting narcissus growth but also offers new perspectives for the harmless reuse of adsorbed solid waste.
期刊介绍：
Scientia Horticulturae is an international journal publishing research related to horticultural crops. Articles in the journal deal with open or protected production of vegetables, fruits, edible fungi and ornamentals under temperate, subtropical and tropical conditions. Papers in related areas (biochemistry, micropropagation, soil science, plant breeding, plant physiology, phytopathology, etc.) are considered, if they contain information of direct significance to horticulture. Papers on the technical aspects of horticulture (engineering, crop processing, storage, transport etc.) are accepted for publication only if they relate directly to the living product. In the case of plantation crops, those yielding a product that may be used fresh (e.g. tropical vegetables, citrus, bananas, and other fruits) will be considered, while those papers describing the processing of the product (e.g. rubber, tobacco, and quinine) will not. The scope of the journal includes all horticultural crops but does not include speciality crops such as, medicinal crops or forestry crops, such as bamboo. Basic molecular studies without any direct application in horticulture will not be considered for this journal.
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