Abstract：
The extensive use of mineral fertilizers has a negative impact on the environment, whereas wastewater and microalgal biomass can provide crops with nutrients such as nitrogen, phosphorus, and potassium, and have the potential to be used as a source of fertilizers in circular agriculture. In this study, a step-by-step resource utilization study of algae-containing wastewater generated from microalgae treatment of swine wastewater was carried out. When wheat seedlings were cultivated in the effluent after microalgae separation, the root fresh weight, seedling fresh weight, and total seedling length were increased by 3.44%, 14.45%, and 13.64%, respectively, compared with that of the algae-containing wastewater, and there was no significant difference in seedling fresh weight, total seedling length, maximum quantum yields of PSII photochemistry (Fv/Fm), and performance index (PIABS) from that of the Hogland solution group, which has the potential to be an alternative liquid fertilizer. Under salt stress, microalgae extract increased the contents of GA3, IAA, ABA, and SA in wheat seedlings, antioxidant enzymes maintained high activity, and the PIABS value increased. Low-dose microalgae extract (1 mL/L) increased the root fresh weight, seedling fresh weight, longest seedling length, and total seedling length by 30.73%, 31.28%, 16.43%, and 28.85%, respectively. Algae extract can act as a plant biostimulant to regulate phytohormone levels to attenuate the damage of salt stress and promote growth.
摘要：
矿物肥料的大量使用对环境产生了负面影响,而废水和微藻生物质可以为作物提供氮等养分，磷，钾，并有可能在循环农业中用作肥料来源。在这项研究中,对微藻处理养猪废水产生的含藻废水进行了逐步资源化利用研究。当小麦幼苗在微藻分离后的废水中培养时，根鲜重，幼苗鲜重,幼苗总长度增加了3.44%，14.45%，和13.64%，分别,与含藻废水相比，幼苗鲜重没有显着差异，总幼苗长度，PSII光化学的最大量子产率（Fv/Fm），和Hogland解决方案组的性能指标(PIABS)，它有可能成为替代液体肥料。在盐胁迫下，微藻提取物增加了GA3，IAA，ABA,和小麦幼苗中的SA，抗氧化酶保持高活性，和PIABS值增加。低剂量微藻提取物（1mL/L）增加了根鲜重，幼苗鲜重,最长的幼苗长度，幼苗总长度减少30.73%，31.28%，16.43%,和28.85%，分别。藻类提取物可以作为植物生物刺激剂，调节植物激素水平，减轻盐胁迫的伤害，促进生长。
