Combined Effect of Biological and Organic Fertilizers on Agrobiochemical Traits of Corn (<i>Zea mays</i> L.) under Wastewater Irrigation
2024
Hossein Shirzad | Sina Siavash Moghaddam | Amir Rahimi | Salar Rezapour | Jianbo Xiao | Jelena Popović-Djordjević
Corn (<i>Zea mays</i> L.) is an important annual grain that is cultivated as a food staple around the world. The current study examined the effect of wastewater and a combination of biological and organic fertilizers on the morphological and phytochemical traits of corn, using a factorial experiment based on a randomized complete block design with three replications. The first factor was biological and organic fertilizers at seven levels, including the control (no fertilization), bacterial biological fertilizers (NPK) along with iron and zinc Barvar biofertilizers, fungal biofertilizers made from Mycorrhiza and <i>Trichoderma</i>, biochar, a combination of bacterial and fungal biofertilizers, and a combination of bacterial and fungal biofertilizers with biochar. The second factor was irrigation at two levels (conventional irrigation and irrigation with wastewater). The traits studied included the morphological yield, phenols, flavonoids, polyphenols, glomalin, cadmium content in plant parts, and translocation factor (TF). The results disclosed that the best treatment in regard to the morphological traits was related to conventional water + biochar + mycorrhiza + <i>Trichoderma</i> + NPK. The highest phenol and flavonoid content were observed when biochar + mycorrhiza + <i>Trichoderma</i> + NPK treatments were used in both water treatments. Also, the wastewater + biochar + mycorrhiza + <i>Trichoderma</i> + NPK treatment demonstrated the highest total glomalin and phenylalanine ammonia-lyase (PAL) activity. The obtained results demonstrate that combined biological and organic fertilizer use on corn plants can effectively alleviate the deleterious effects of cadmium present in wastewater.
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