Influence of chlorine injection on soil enzyme activities and maize growth under drip irrigation with secondary sewage effluent

Assessment of residual chlorine in soil microbial community using metagenomics

“…Soil acid phosphatase (ACP) could decompose organic phosphorus compounds to produce phosphate that was used by plants and microorganisms, and thus plays a key role in the soil phosphorus cycle (Olander and Vitousek, 2000;Qian et al, 2007). The level of urease, which could degrade urea (an important nitrogen fertilizer) to CO 2 and NH 3, reflected the soil nitrogen content, and has been shown to be highly sensitive to soil pollution (Hu et al, 2013;Hao et al, 2018). In this study, the effect of chlorine on soil enzyme activity was related to the type of soil enzyme, the concentration of chlorine treatment, and the treatment time.…”

“…Previous studies on the effects of chlorination in irrigation water on plants and epiphytic microorganisms provided a research basis for the risk assessment of chlorine-containing disinfectants residual on the soil environment (Lonigro et al, 2017;Truchado et al, 2019). For example, Hao et al (2018) found that long-term agricultural irrigation with chlorinated water had a slight impact on soil enzyme activity but indicated that it was safe for field crops with precipitation leaching. Similarly, the ClO 2 treatment of irrigation water did not affect the diversity of water, soil, or crop bacterial communities.…”