Wastewater from Fish Farms for Producing Eucalyptus grandis Seedlings

ABSTRACT This work aimed to evaluate the development and quality of Eucalyptus grandis seedlings produced with different dosages of wastewater from fish farming. The experiment was arranged in a completely randomized design with five treatments and four replicates. The treatments were fish wastewater (FW); daily nutritional solution (DNS), combinations of 50% DNS + 50% FW; 25% DNS + 75% FW and solution with weekly application (WNS). The best growth and development results of the eucalyptus seedlings were observed for the solutions applied daily and weekly. The 50% DNS + 50% FW combination did not differ from daily and weekly nutritional solutions for Dickson’s quality index. Fertigation only with wastewater from fish farming resulted in lower growth and development of the seedlings, but the use of the combination of 50% FW + 50% DNS enabled the production of seedlings of similar quality to those fertigated with nutritional solutions.

摘要：本研究旨在评估不同剂量养鱼废水培育的巨桉（Eucalyptus grandis）幼苗的生长表现与品质。试验采用完全随机设计，设置5个处理组与4次重复。各处理分别为：养鱼废水（FW）、每日营养液（DNS）、50% DNS + 50% FW混合液、25% DNS + 75% FW混合液，以及每周施用营养液（WNS）。结果表明，每日和每周施用营养液的处理组，巨桉幼苗的生长发育表现最优。在迪克森品质指数（Dickson’s Quality Index）方面，50% DNS + 50% FW混合液处理与每日、每周营养液处理无显著差异。仅采用养鱼废水进行施肥灌溉的处理会导致幼苗生长发育水平较低，但使用50% FW + 50% DNS的混合配方，可培育出与营养液施肥灌溉处理品质相当的幼苗。