Abstract Phosphorus (Pi) is one of the most limiting factors in plant nutrition as it is the least mobile and available nutrient to plants in most soil conditions. The management of Pi fertilization in agriculture raises ecological, economic, and social issues, since phosphate rock minerals are the only significant global resources of Pi and they will be rapidly depleted. Eggshell waste is a big problem for food companies producing different types of egg products, since the eggshell waste is very often simply discarded and disposed at landfills, with high costs related to their disposal. The aim of this work was the characterization of eggshells as a Pi source for plants, using tomato (Solanum lycopersicum L cv Marmande) as a model species. Plants were grown hydroponically being exposed to adequate and limited Pi availability, with or without eggshell powder. Plant growth performance was characterized by analyzing changes in fresh weight, protein, chlorophyll concentration, carotenoid content, and measuring the plant’s capability to accumulate phosphate. The addition of eggshell powder to the nutrient solution significantly improved plant growth and increased protein and chlorophyll concentration, not only with respect to P-deficient control, but also with P-sufficient ones. Furthermore, eggshell powder significantly increased Pi accumulation in P-deficient plants, suggesting that eggshell waste could be a suitable material as Pi source for tomato plants, thus contributing to the environmentally friendly disposal of this waste.

中文翻译：

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蛋壳作为水培番茄 (Solanum lycopersicum L.) 幼苗磷酸盐来源的初步评估

摘要 磷 (Pi) 是植物营养中最具限制性的因素之一，因为在大多数土壤条件下，它是植物流动性和可利用性最少的养分。磷肥在农业中的管理会引发生态、经济和社会问题，因为磷矿是全球唯一重要的磷资源，而且会迅速枯竭。对于生产不同类型蛋制品的食品公司来说，蛋壳废物是一个大问题，因为蛋壳废物通常只是简单地丢弃并在垃圾填埋场处理，处理成本很高。这项工作的目的是使用番茄 (Solanum lycopersicum L cv Marmande) 作为模型物种，将蛋壳表征为植物的 Pi 来源。植物水培生长，暴露于充足且有限的 Pi 可用性，有或没有蛋壳粉。通过分析鲜重、蛋白质、叶绿素浓度、类胡萝卜素含量的变化并测量植物积累磷酸盐的能力来表征植物生长性能。在营养液中添加蛋壳粉可显着改善植物生长并增加蛋白质和叶绿素浓度，不仅在缺磷防治方面，而且在磷充足防治方面也是如此。此外，蛋壳粉显着增加了缺磷植物中磷的积累，表明蛋壳废物可能是作为番茄植株磷源的合适材料，从而有助于对这种废物进行环保处理。类胡萝卜素含量，并测量植物积累磷酸盐的能力。在营养液中添加蛋壳粉可显着改善植物生长并增加蛋白质和叶绿素浓度，不仅在缺磷防治方面，而且在磷充足防治方面也是如此。此外，蛋壳粉显着增加了缺磷植物中磷的积累，表明蛋壳废物可能是作为番茄植株磷源的合适材料，从而有助于对这种废物进行环保处理。类胡萝卜素含量，并测量植物积累磷酸盐的能力。在营养液中添加蛋壳粉可显着改善植物生长并增加蛋白质和叶绿素浓度，不仅在缺磷防治方面，而且在磷充足防治方面也是如此。此外，蛋壳粉显着增加了缺磷植物中磷的积累，表明蛋壳废物可能是作为番茄植株磷源的合适材料，从而有助于对这种废物进行环保处理。