The increasing aridity exacerbated by climatic changes is leading to loss of perennial herbaceous plants Cenchrus ciliaris, an apomictic, polyploid grass used as forage in hot and dry areas, and is currently under threat for the increased scarcity of water. In this study, treated municipal wastewater (TWW) was used to irrigate two ploidy levels of C. ciliaris for two consecutive years. The objectives were (1) to assess the possibility of using unconventional water for watering C. ciliaris and (2) to identify at what extent TWW irrigation affected growth and nutritive properties of C. ciliaris that differed for polyploidy level. TWW irrigation positively affected growth and physiological plant parameters. In leaves of TWW watered C. ciliaris, the concentration of N_t, P and K significantly increased. The tetraploid C. ciliaris showed a better growth and quality than the hexaploid ones, appearing the most suitable cultivar to be irrigated with TWW for feed uses. In short, TWW can be strategically used for irrigating forage species with the double output of ameliorating soil properties, recovering degraded area and improving the nutritive values of fodder species contributing to the promotion of a green and sustainable circular economy, more in climatically under pressure developing countries.

中文翻译：

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处理城市废水作为使用淡水种植有价值的牧草物种水牛草（Cenchrus ciliaris L.）的选择

气候变化加剧了日益严重的干旱，导致多年生草本植物Cenchrus ciliaris的丧失，Cenchrus ciliaris是一种无融合生殖的多倍体草，在炎热和干燥的地区用作饲料，目前正受到水资源日益短缺的威胁。在这项研究中，连续两年使用经过处理的城市废水（TWW）灌溉两个倍性水平的纤毛藻。目的是 (1) 评估使用非常规水浇灌C. ciliaris的可能性，以及 (2) 确定 TWW 灌溉在多大程度上影响C. ciliaris的生长和营养特性（因多倍体水平而异）。TWW 灌溉对植物的生长和生理参数产生积极影响。在 TWW 的叶子上浇水C. ciliaris 中，N _t 、P 和K的浓度显着增加。四倍体C. ciliaris表现出比六倍体更好的生长和质量，似乎是最适合用 TWW 灌溉用作饲料的品种。简而言之，TWW可以战略性地用于灌溉饲料物种，具有改善土壤性质、恢复退化面积和提高饲料物种营养价值的双重产出，有助于促进绿色和可持续的循环经济，尤其是在气候发展压力下国家。