| Abstrakt: |
In order to evaluation of phytoremediation capability of Chenopodium quinoa Willd along with application of three types of biochar in cadmium contaminated soil, a factorial experiment was conducted in a completely randomized design with four replications in 2021. The treatments of this experiment include five levels of Cd (0, 25, 50, 75, and 100 mg Cd / kg soil from the source of cadmium nitrate) and four types of biochar (pomegranate and plum wood, wheat straw, North forest wood, and control). In this experiment, root dry weight and shoot dry weight decreased by 88.7 and 126.8% in response to increasing cadmium concentration, respectively. Pomegranate and plum wood biochar and wheat straw biochar increased root dry weight (18.8% and 40%, respectively) and shoot dry weight (35.8% and 79.4%, respectively). While the North forest wood biochar reduced root dry weight by 18.8% and shoot dry weight by 31.8%, with increasing cadmium concentration in soil, roots and shoots of quinoa increased by 484883.3, 90634.7, and 115805.4%, respectively. Application of pomegranate and plum wood biochar and wheat straw biochar reduced the concentration of cadmium usable in soil, cadmium concentration in roots and shoots. While, the North forest wood biochar on all levels, except the control, increased the concentration of usable cadmium in the soil, the concentration of cadmium in the roots and shoots of quinoa. With increasing cadmium concentration, tolerance index decreased by 129.4% compared to control. Due to the high tolerance index, translocation factor and bioaccumulation factor, the use of this plant in remediation can be recommended. On the other hand, the use of pomegranate and plum wood biochar and wheat straw biochar can reduce the concentration of cadmium in soil, root and shoot, as well as can improve plant yield, therefore, can be used for phytostabilization and reduce heavy metals in plant organs. On the other hand, the use of North forest wood biochar with the ability of increasing the concentration of cadmium in the soil, root and shoot can be used as an aid to increase of plant extraction. According to the results of this study, farmers can be advised to use pomegranate and plum wood biochar and wheat straw biochar in fields containing heavy metals such as cadmium to reduce these heavy metals. On the other hand, the use of North forest wood biochar should be avoided due to increased mobility of heavy metals in the fields. [ABSTRACT FROM AUTHOR] |
