M. Zare; M. Chorom; N. Moallemi
Volume 37, Issue 2 , March 2015, , Pages 1-15
Abstract
Release of urban sewage in the environment is considered a serious problem to the environment and human health while its use in agriculture is recommended as a rich fertilizer in organic matter and major nutrients affecting plant growth. In this study, the use of treated urban sewage sludge, as a cheap ...
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Release of urban sewage in the environment is considered a serious problem to the environment and human health while its use in agriculture is recommended as a rich fertilizer in organic matter and major nutrients affecting plant growth. In this study, the use of treated urban sewage sludge, as a cheap organic fertilizer, a reproducible source in the nature and a municipal waste on the chemical properties of soil and essential nutrients of olive plant and soil alone and in combination with chemical fertilizer, was investigated. This study was conducted at Shahid Chamran University of Ahvaz greenhouse with 12 treatments and 3 replications within six months. Effects of sewage sludge, chemical fertilizer and combined effects on various parameters such as ECe, pH, organic matter content and essential nutrients of olive plant and soil and olive physiological characteristics were determined. Soil nutrient concentrations and physiological function of olive plants subjected to sewage sludge increased, and soil pH significantly decreased. The effect of sewage sludge and fertilizer on the vegetative components of the olive plant, including number of lateral branches, number of new leaves, height and leaf dry weight, significantly increased. Sewage sludge improved some soil chemical properties. 150 tons of sewage sludge per hectare without fertilizer treatment had the best effect on the properties of olive plants and soil. Sewage sludge increased the number of leaf, leaf area and organic matter content about twice times comparing with blank treatment but decreased 0.4 unit pH. Effect of sewage sludge on soil potassium content was fewer than P and N.
N. Mehrab; M. Chorom; S. Hojati
Volume 37, Issue 1 , September 2014, , Pages 1-11
Abstract
To evaluate the effect of two types of soil textures and zeolite enriched with ammonium on growth characteristics of wheat and water use efficiency, a factorial experiment based on a completely randomized design with three replications in greenhouse condition was conducted at Shaid Chamran University ...
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To evaluate the effect of two types of soil textures and zeolite enriched with ammonium on growth characteristics of wheat and water use efficiency, a factorial experiment based on a completely randomized design with three replications in greenhouse condition was conducted at Shaid Chamran University in the autumn of 2011. Treatments were 5% and 10% of the raw zeolite, 5% and 10% zeolite enriched with ammonium, fertilizer treatment (100 kg ha-1) and soil textures were clay loam and sandy loam. The results showed that the soil texture significantly affected the growth characteristics of wheat and water use efficiency (P<0.01). The plant nitrogen percentage, 1000-seed weight and seed yield were higher in sandy loam soil than in clay loam. Water use efficiency in sandy loam, was more than clay loam. None of the zeolite treatments had a significant effect on water use efficiency. The highest percentage of plant nitrogen fertilizer plants treated with ammonium-rich zeolite and 10%, respectively. The highest percentage of plant nitrogen was observed in chemical fertilizer treatment and 10% NH4+-zeolite and the highest seed yield was obtained in 10% NH4+-zeolite treatment. The highest C/N ratio was measured in treated with 10% raw zeolite in a sandy loam soil. Therefore, the application of ammonium zeolite enriched can be improved wheat growth characteristics and using less chemical fertilizer and thereby also saving on fertilizers helped to reduce environmental pollution.
