Instituto de Investigaciones Oceanológicas, Doctorado en Medio Ambiente y Desarrollo, Universidad Autónoma de Baja California, Carretera Transpeninsular Ensenada-Tijuana No 3917, Fraccionamiento Playitas, C.P. 22860, Ensenada, Baja California, Mexico.
Instituto de Ciencias Agrícolas, Universidad Autónoma de Baja California, Carretera Delta s/n, C.P. 21705, Ejido Nuevo León, Baja California, Mexico.
Bull Environ Contam Toxicol. 2019 Jun;102(6):829-835. doi: 10.1007/s00128-019-02611-3. Epub 2019 Apr 9.
In 2014 reclaimed water (RW) started to be used for agricultural irrigation of 200 ha in Maneadero Valley, Baja California, Mexico. The RW had relatively high electrical conductivity (4-5 dS m), and K, Mg, PO and Cl concentrations relative to irrigation guidelines. However, no accumulation of these elements, nor total nitrogen, was observed in the studied soils. The main effect of RW irrigation was the downcore leaching of Cl and Na below 120 cm, causing an increase in electrical conductivity in the lower soil horizons. Al, Fe and Zn showed a twofold to eightfold accumulation in the top soil layer after 2 years. Moderate to severe chemical clogging of dripping systems and potential biological clogging are likely to occur. Mexican national guidelines for the reuse of RW do not take into account specific variables that could change the quality of agricultural soil or lead to clogging of drip irrigation systems.
2014 年，墨西哥下加利福尼亚州马内拉多谷开始使用再生水（RW）灌溉 200 公顷土地。与灌溉指南相比，该 RW 的电导率（4-5 dS m）以及 K、Mg、PO 和 Cl 浓度相对较高。然而，在所研究的土壤中没有观察到这些元素的积累，也没有观察到总氮的积累。RW 灌溉的主要影响是将 Cl 和 Na 在下 120 厘米以下向下淋洗，导致较低土壤层的电导率增加。在 2 年后，Al、Fe 和 Zn 在表层土壤中积累了 2 到 8 倍。滴灌系统可能会发生中等至严重的化学堵塞和潜在的生物堵塞。墨西哥国家 RW 再利用指南没有考虑到可能改变农业土壤质量或导致滴灌系统堵塞的具体变量。
