Effect of compost on phytoremediation of salt and nitrate by mungbean
Document Type : Research Paper
Authors
1 agriculture and natural resource faculty, gonbad kavoos university
2 Department of Civil Engineering, University of Asia Pacific
3 department of watershed management, Gonbad Kavous University.
4 agriculture and natural resource faculty, gonbad kaous university
Abstract
Due to the importance of land contamination due to industrial and agricultural activities, the present study was conducted to study the effect of compost on the nitrate uptake ability of mung bean. This factorial design was carried out in a randomized complete block design in the greenhouse of Gonbadkavus University in 1977. Factors studied were nitrate + compost composition at 7 levels including nitrate at concentrations of 10, 30 and 50 mg / L alone, nitrate at concentrations of 10, 30 and 50 mg / L with compost and control treatment ( Soil without compost and nitrate) and soil depth at three levels including 0-10, 10-20 and 20-30 cm. At the planting and maturing stages, some growth parameters including fresh and dry weights of shoots and roots, nitrate concentrations in soil and plant organs, salinity in soil and plant organs were measured. The results showed that the highest nitrate concentration (30.32 mg / L) was obtained in compost + nitrate with 50 mg / L (SCn3) treatment and the lowest nitrate concentration (3.14 mg / l) was observed in pods. The shoot of the plant was in control treatment. At maturity stage, the highest nitrate concentration (10.33 mg / L) was related to plant root in nitrate treatment with 50 mg / L (Sn3) and the lowest nitrate concentration (1.5 mg / L) was related to control leaf. The highest fresh weight of plant at the pod and ripening stage was related to plant root + compost and 50 mg / l nitrate (scn3) were 36.97 and 17.69 g, respectively. The lowest fresh weight of the plant was 4.87 g (control treatment) in the pod heading stage and in the leaf treatment stage and compost + irrigation with 30 mg / l nitrate (Scn2) concentration of 6.41. It was warm. The highest plant dry weight (103.2 g) was related to plant root and irrigation with 50 mg / L nitrate (Sn3) and the lowest plant dry weight (26.7 g) was related to plant leaf and control. According to the results, nitrate uptake by root and shoot of mungbean increased with increasing compost. At high nitrate concentrations, the effect of compost on nitrate uptake by mungbean was greater and nitrate was transferred to the shoots.
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