This research was developed under field conditions, in the Sewer Treatment Station of the Company of Water and Sewers of Paraiba state, in Campina Grande city, Brazil, with the objective of verifying the effect of treated wastewateron chemical properties of the soil cultivated with cotton. The randomized blocks experimental design was used in factorial scheme (4 x 2) with three replications, whose factors were four treated wastewater depths (278, 416, 554 and 692 mm) and two soil sampling times (before and after cultivation of colored cotton, with a rainfall of 89 mm during the crop cycle). After irrigation with effluent of stabilization pond and a rainfall of 89 mm, the contents of P, K~+, Ca~(2+), H~+ and the capacity ofcationic change of the soilincreased, while the contents of Na~+, Mg~(2+) and the sodium exchangeable percentage decreased.
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机译：该研究是在巴西坎皮纳格兰德市（Paraiba State）的水和下水道公司的下水道治疗站的现场条件下开发的目的是验证棉花栽培土壤的处理废物化学性质的效果。随机嵌段实验设计用于阶乘方案（4 x 2），具有三种复制，其因素是四个处理的废水深度（278,416,554和692mm）和两次土壤采样时间（呈彩色棉花之前和培养前后。在作物周期期间降雨量为89毫米）。用稳定池的流出物灌溉和降雨量为89毫米，P的含量为p，k〜+，ca〜（2+），h〜+和土壤中的容量，而Na〜+的内容物， Mg〜（2+）和钠可交换百分比减少。
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