Hossein Mirzaei-Takhtgahi; Hooshang Ghamarnia; Milad farmanifard
Abstract
In this research, the effect of vemicompost on yield and yield components of tomato and okra was investigated under irrigation with contaminated water. The experiment included two treatments using vermicompost and control with three replications; and it was conducted at the Campus of Agriculture and ...
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In this research, the effect of vemicompost on yield and yield components of tomato and okra was investigated under irrigation with contaminated water. The experiment included two treatments using vermicompost and control with three replications; and it was conducted at the Campus of Agriculture and Natural Resources of Razi University. Vermicompost was applied at 25 ton per hectare in two stages: 10 t/ha at the crop cultivation period, and 15 t/ha one month after cultivating. The effect of vermicompost growth indexes including plant height, stem diameter, fruit diameter and weight, chlorophyll index, stem and leaf dry matter percentage and yield were investigated. The comparison of the average yield of tomato and okra showed that only fruit weight of tomatoes was statistically significantly different, and there was no statistically significant difference between the two treatments in other characteristics. In tomatoes treated with vermicompost, plant height, stem diameter, chlorophyll index, stem and leaves dry matter percentage were increased by 2.3%, 0.3%, 7.3%, 5.6% and 9.1 percent and fruit diameter, fruit weight and yield were decreased 25.5%, 42.6% and 73.2 percent, respectively compared with the control. Also, in okra under application of vermicompost, plant height, stem diameter, fruit diameter, fruit weight, chlorophyll index and yield were increased by 10.3%, 1.2%, 10.4%, 13.3%, 3% and 35.7%, while stem and leaves dry matter percentages were increased by 5.5% and 11.7%, respectively, compared with the control. Considering the significant reduction in tomato fruit weight and reduction of its fruit diameter and yield, as well as reduction of stem and leaves dry matter in okra, and in light of the high risk of using contaminated water and possible contamination of the fruit and reduction of its quality and health, the use of vermicompost for these crops under irrigation with contaminated water is not recommended. In general, the use of contaminated water is unacceptable for human and animal foods.
Hossein Mirzaei-Takhtgahi; hooshang ghamarnia
Abstract
This study was conducted to investigate accumulation of Cu, Fe, Zn, Cd, and Mn in different vegetables such as spinach (Spinacia oleracea), fenugreek (Trigonella foenum-graceum) and dill (Anethum graveolens) under irrigation with contaminated water of Ghareso River and well water (control), as two treatments. ...
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This study was conducted to investigate accumulation of Cu, Fe, Zn, Cd, and Mn in different vegetables such as spinach (Spinacia oleracea), fenugreek (Trigonella foenum-graceum) and dill (Anethum graveolens) under irrigation with contaminated water of Ghareso River and well water (control), as two treatments. This study was carried out on root and shoot of three vegetables with three replications as split-plot in a randomized complete block design. The results showed that contaminated water significantly increased the concentration of Cu, Fe, Zn, and Mn in spinach (P Mn > Zn > Cu > Cd. Fe had the highest and Cd had the lowest accumulation in plants. The concentration of Cu and Fe in the shoot and root of spinach, fenugreek, and dill was higher than the WHO standard. The contents of Zn and Mn in the shoot and root of spinach, fenugreek, and dill were below the permissible limit of some standards, but more than the other standards. The amount of Cd in the shoot and root of the examined vegetables was higher than the permissible limit of all standards.
m f; h gh; Meghdad Pirsaheb; Nazir Fatahi
Abstract
Crisis of renewable water resources and rising demand for access to fresh water in arid and semi-arid countries is increasing. Therefore, it is indispensable to conserve water resources with high quality for urban purposes and drinking and use water resources with lower quality (such as treated wastewater) ...
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Crisis of renewable water resources and rising demand for access to fresh water in arid and semi-arid countries is increasing. Therefore, it is indispensable to conserve water resources with high quality for urban purposes and drinking and use water resources with lower quality (such as treated wastewater) for other purposes such as agriculture and industry. In these conditions, having adequate information and local data in different parts of the world is essential. Thus, the main purpose of this study was to investigate the effects of two-year long-term irrigation with treated municipal wastewater in comparison with well water (as the control treatment) on the physical properties of soil. The soil physical properties were measured in three layers, each with three replications, and included saturation hydraulic conductivity (Ks), soil moisture characteristic curve, moisture content at field capacity (θFC) and permanent wilting point (θPWP) as well as “available water”, bulk and practical density, and porosity of the surface soil to depth of 90 cm . The study was conducted using a two-year split plot design. The rsults of statistical analysis showed that there was no uniform trend between various parameters and the influence of irrigation treatments at different depths of soil parameters were different. Results showed that the soil Ks in treatments irrigated with wastewater increased, compared to the control treatments, by 109%, 25%, and 75% in depths of 0-30, 30-60, and 60-90 cm, respectively. In addition, application of treated wastewater caused increase in the soil moisture content at θFC and θPWP point, but reduced the amount of total available water content. The effect of irrigation with treated wastewater decreased surface soil bulk density and increased its practical density. Also, the soil porosity in the 0-30 and 30-60 cm layers was lower compared to the control treatment, but was higher in 60-90 cm layer. Generally, it can be concluded that the use of treated wastewater improves soil physical conditions, but the application of untreated sewage water and TWW for irrigation is not recommended for edible crops.