Mehrdad Ranjbar; Hadi Ghorbani; Mehdi Ghajar Sepanlou
Volume 18, Issue 4 , Winter 2017, , Pages 753-764
Abstract
In order to investigate the effect of long-term application of Municipal Solid Waste Compostand chemical fertilizer on concentration of macro elements (N, P and K) in the soil and rice, an experiment was carried out as a randomized complete blocks design with three replications and 14 fertilizer treatments ...
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In order to investigate the effect of long-term application of Municipal Solid Waste Compostand chemical fertilizer on concentration of macro elements (N, P and K) in the soil and rice, an experiment was carried out as a randomized complete blocks design with three replications and 14 fertilizer treatments in 2014. Fertilizer treatments included the control (without fertilizer and organic fertilizer), fertilizer treatments (based on the soil analysis), and treatments of 15, 30 and 45 tons of municipal solid waste compost per hectare as simple form along with 1/4, 2/4 and 3/4 of chemical fertilizer. Results showed that 7-year application of municipal solid waste compost increased significantly the concentration of some macro nutrients (nitrogen, phosphorus and potassium) in soil and rice grain compared with the control treatment (P<0.01). The highest concentration of macro elements in soil was obtained in 45 tons of municipal solid waste compost plus 75% fertilizer treatment, which showed 73.68% increase in nitrogen concentration, 230% increase in the concentration of phosphorus and 30.74% increase in potassium concentration in comparison to the control treatment. The highest concentration of potassium element in rice grain was obtained 45 tons in municipal solid waste compost plus 75% fertilizer treatment. The lowest concentration of macro elements was in soil and rice in the control treatment and chemical fertilizer. Finally, Municipal Solid waste compost can be combined for fertilizer to increase the concentration of some macro elements in soil and rice.
Atena Gholipur; Mehdi Ghajar sepanlu; Mohammad ali Bahmaniar
Volume 17, Issue 4 , Winter 2016, , Pages 881-892
Abstract
In order to study the effect of municipal solid waste application with or without chemical fertilizer on the concentration of heavy metals in soil and rice plant, an experiment was conducted with randomized complete block design in three replications and fourteen treatments in Research Station of Sari ...
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In order to study the effect of municipal solid waste application with or without chemical fertilizer on the concentration of heavy metals in soil and rice plant, an experiment was conducted with randomized complete block design in three replications and fourteen treatments in Research Station of Sari Agricultural and Natural Resources University in 2009 and 2010. The treatments included control treatment, chemical fertilizer, 15, 30 and 45 ton/ha municipal solid waste compost and chemical fertilizer at three levels (25, 50 and 75 percent). Results indicated that applying compost for two years showed no significant effect on any of the available heavy metals in soil. However, significant increases were observed for Lead (Pb2+) in root, and Pb2+, Cd2+, Nicle and Cobalt in shoot and Cadmium (Cd2+) in grain. Meanwhile, the highest amount of heavy metals was concentrated in 45 t/ha of municipal solid waste + 75 percent chemical fertilizer treatment. Thus, using municipal solid waste compost, the amount of the heavy metals increased in soil and rice plant but their concentrations were below their toxicity limit.