Hossein Aliabadi Farahani's research while affiliated with Young Researchers Club and other places

Tests were done on the effects of treatments of titanium dioxide spray on corn (Zea mays L.). The study was conducted as a factorial experiment in a randomized complete block design with four replications. Treatments consisted of two factors; the first factor was stage of plant growth that spraying was applied (vegetative stage, appearance of male flowers and female flowers); and the second factor was that of different concentrations of titanium dioxide nanoparticles (Tio2) that consisted of spray with water (control), titanium dioxide or bulk, nano titanium dioxide at concentrations of 0.01% and 0.03%. Results showed that effect of nano Tio2 was significant on chlorophyll content (a and b), total chlorophyll (a + b), chlorophyll a/b, carotenoids and anthocyanins. The maximum amount of pigment was recorded from the treatment of nano Tio2 spray at the reproductive stage (appearance of male and female flowers) in comparison with control. Thus, an application of nanoparticles (nanao Tio2) can facilitate an increase in crop yield, especially corn yield.

This experiment was carried out using by a split plot design with four replications to determination of Zn-foliar application influence on quality and quantity features in Phaseolous vulgaris under different levels of N and K fertilizers at Iran in 2010. The factors were included nitrogenous fertilizer (250 kg urea/ha, 300 kg urea/ha and 350 kg urea/ha) in main plots and subplots were included potassium fertilizer and Zn-foliar application (120 kg K/ha, 6/1000 Zn-foliar application and 120 kg K/ha whit 6/1000 Zn-foliar application together) that sprayed by the results of soil analysis. Our data showed that N, K and Zn-foliar application significantly affected Zn in pod, nitrate in pod, carbohydrate percentage, carbohydrate yield, protein percentage, protein yield, chlorophyll of leaf, radiation use efficiency, extinction coefficient, number of plant in m 2, number of cutting in plant, number of pod in plant, number of pod in m 2, number of seed in pod, 100 seed weight, fresh pod yield, seed yield, biological yield, HI and plant height. The results of this experiment showed that the Zn-foliar application increased all features in bean and also, reduced N fertilizer rate without reduction in more plant characteristics. The results can be used in agronomy and increase the quantitative and qualitative features for achieve to the sustainable agriculture.

To evaluate the beneficial impact of nitrogen fertilizer on droughted calendula (Calendula officinalis L. var. 'Qazvin') some yield characters were investigated. In this experiment, the interactive effects of different N fertilizer and water restriction on oil variations and percentage in Iran during 2009 were studied. The experimental unit had designed by achieved treatment in factorial on the basis completely randomized block design with four replications. Certain factors were including N fertilizer (0, 30, 60 and 90 kg urea/ha) and water stress. In this study, calendula water supply was determined by indicated irrigation conditions by water evaporation from evaporation pan (40, 80 and 120 mm water evaporation). The results showed that however application of N fertilizer significantly increased the yield compounds such as: oil content, seed yield, oil percentage, head diameter, thousand seed weight and number of seeds in head in p ≤ 0.01 of plants. Although, the non-drought stress treatment significantly increased yield compounds which were achieved under irrigation conditions (non-drought). The findings indicated that application of N fertilizer persist less damaging of drought stress result and it enabled plant to significantly increased its photosynthesis by root development and chlorophyll production under the drought conditions.

به طور کلی مدل¬های شبیه¬سازی تخمین عملکرد محصول دارای دو زیر برنامه اصلی می¬باشند یکی زیر مدل بیلان آب که وظیفه آن شبیه سازی رطوبت لایه¬های خاک می¬باشد و دیگری زیر مدل عملکرد محصول که با استفاده از مقادیر شبیه سازی شده رطوبت خاک، تخمینی از عملکرد محصول را ارئه می¬نماید. نقش زیر مدل بیلان آب خاک در این مدلها بسیار مهم می¬باشد و در صورتی که وظیفه خود را به خوبی انجام ندهد در نهایت مدل در تخمین عملکرد محصول با خطا مواجه خواهد شد. يكي از اين مدلها مدل MEDIWY (Model for Estimation of Dryland and Irrigated Wheat Yield) بوده كه براي گندم زمستانه رقم عدل در شرايط آبي و ديم و در شرايط آب و هوايي منطقه باجگاه واقع در استان فارس ارائه شده است. با توجه به کاربردی بودن مدل MEDIWY اهتمام ورزیده شده تا زیر مدل بیلان آب خاک در این مدل مورد بحث و بررسی بیشتری قرار گیرد. در پژوهش حاضر زیر مدل بیلان آب خاک مدل MEDIWY با یک مدل دیگری به نام مدل LEACHW که یک مدل توانا برای شیبه¬سازی رطوبت لایه¬های خاک می¬باشد، برای منطقه مراغه واقع در استان آذربایجان شرقی مورد مقایسه و ارزیابی قرار گرفت. شاخص¬های آماری مورد نظر برای ارزیابی مدل-ها در برآورد عمق آب پروفیل خاک به دست آمد. به طور کلی شاخص¬های آماری به دست آمده از طریق مدل LEACHW دارای مقادیر عددی مناسب¬تری نسبت به شاخص¬های به دست آمده از طریق مدل MEDIWY می¬باشد .میزان خطای متوسط در برآورد رطوبت خاک در مدل LEACHW از 52/1 تا 31/3 درصد و در مدل MEDIWY از 12/9 تا 22/14 درصد متغیر می¬باشد که نشان دهنده برتری نسبی مدل LEACHW به MEDIWY در برآورد رطوبت خاک می¬باشد. بنابراین با تعدیل زیر مدل بیلان آب خاک در مدل MEDIWY و استفاده از مدل LEACHW به جای آن، می¬توان دقت مدل MEDIWY را برای تخمین عملکرد محصول افزایش داد.

This study was conducted as split-plot field experiment in a randomized complete block design with four replications for one year planting. The main factors were the sowing dates (10 th August, 1 st September and 20 th September) and sub factors were the planting densities (4, 8 and 12 plants/m 2). The results showed that sowing date and planting density significantly affected grain yield, essential oil yield, essential oil percentage, root length, root diameter, flowering stem number and root yield. Means comparison showed that the highest grain yield and root yield were achieved under the 8 plants/m 2 planting density and 10 th August sowing date, the highest root length and flowering stem number were achieved under 12 plants/m 2 planting density and 10 th August sowing date, the highest root diameter was achieved under 4 plants/m 2 planting density and 10 th August sowing date, the highest essential oil yield was achieved under 8 plants/m 2 planting density and 20 th September sowing date and the highest essential oil percentage was achieved under 4 plants/m 2 planting density and 20 th September sowing date. It was thus concluded that sowing date and planting density are the main factors influencing the quantity and quality characteristics of valerian. Our finding may give applicable advice to commercial farmers and agricultural researches for management and concern on planting density strategy and estimate of sowing date carefully for increase of quantity and quality characteristics in medicinal and aromatic plants farming and is better that such studies may be validated further by conducting for two or more years.

To investigate the beneficial impacts of domestic waste water on soil properties, we conducted an experiment in the lysimeter by measuring certain features essentially related to soil characteristics. The objectives in this study were (i) the domestic waste water in filtration by soil and (ii) the effect of domestic waste water on soil properties. In this experiment, we had 15 lysimeters that 1 -5 lysimeters were irrigated by domestic waste water and primary drainage water was accumulated from these lysimeters and 6 -9 lysimeters were irrigated by primary drainage water and secondary drainage water was accumulated and 10, 11 and 12 lysimeters were irrigated by secondary drainage water. In order to compare soil properties, 13, 14 and 15 lysimeters were irrigated by agronomical water and finally, soil and water properties were analyzed in each stage. The results showed that, soil could filter the domestic waste water and reduced BOD 5 and COD of domestic waste water. Also, irrigation with domestic waste water increased nutritive elements in soil that can be source of nutrition for plants. The findings may give applicable advice to commercial farmers and agricultural researchers for management and proper use of water.

This experiment was carried out using a split plot design with three replications to study the effect of drought stress on oil yield variations in winter rapeseed cultivars at Iran. The factors including irrigation regimes (control, irrigation interrupted from flowering stage, irrigation interrupted from silique formation stage and irrigation interrupted from seed filling stage) in main plots and cultivars (Zarfam, Okapi and Licord) in subplots were studied. Our data showed that rapeseed cultivars significantly affected oil yield, grain yield, thousand grain weight, silique number per plant and grain number per silique in P ≤ 0.01, whereas drought stress had significant effect on thousand grain weight in P < 0.05 and grain number per silique in P ≤ 0.01. The results of this experiment showed that the highest oil yield and thousand grain weight were achieved by Okapi cultivar under control irrigation, highest grain yield and silique number per plant were obtained by Licord cultivar under control irrigation and highest grain number per silique was achieved by Zarfam cultivar under control irrigation and high drought tolerance index was exhibited by Licord cultivar. Our findings indicated that drought stress reduced oil yield of rapeseed cultivars sorely.

n this experiment, we had 15 lysimeters, thatwere planted coriander (Shahre Rey variety) in 1 to 5 lysimeters and were irrigated by domesticwastewater with BOD5 about 150mg/lit and primary drainagewaterwere accumulated at 2010. In the 6 to 9 lysimeters was planted coriander (Shahryar variety) and were irrigated by primary drainage water and then, were accumulated secondary drainage water. We have irrigation 10, 11 and 12 lysimeters by secondary drainage water that was planted inside the coriander (Varamin variety). In order to compare plants characteristics, in 13, 14 and 15 lysimeters were planted Shahryar variety, Shahr-e Rey variety and Varamin variety respectively and were irrigated by agronomical water. The results showed that the soil could reduce BOD5and COD from150 and 232 mg/lit to 11 and 18mg/lit respectively in secondary drainagewater. The essential oil yield of Shahryar variety 17% increased under irrigation by secondary drainage water into irrigation by agronomical water. Therefore, the use of secondary drainage water can be increase the quantity and quality yields in plants and the other hand, protects sweet water resources.

This experiment was carried out to study the ecophysiological influences of zeolite and selenium on water deficit stress tolerance in different rapeseed cultivars at Karaj, Iran using a factorial-split-plot design with three replications during 2009 -2010. The main-plot factors included: irrigation regimes (control and irrigation interrupted during the flowering stage), zeolite (non-application and 10 ton/ha) and selenium (non-application and 30 g/l) while the sub-plot factor included three cultivars (Opera, SLM 046 and Modena) of winter rapeseed (Brassica napus L.). The results showed that total dry weight (TDW), life area index (LAI), relative growth rate (RGR) and crop growth rate (CGR) were all highly significantly different among the rapeseed cultivars, whereas drought stress had effects of practical significance on TDW, LAI, RGR and CGR and zeolite and selenium applications reduced the water deficit stress damages. The results also showed that the highest TDW, LAI, RGR and CGR were obtained from Opera cultivar by zeolite and selenium applications under no-drought condition. The findings firmly established that drought stress sorely reduces physiological growth indices of winter rapeseed cultivars under conditions of Karaj in Iran while, zeolite and selenium applications were reduced the water deficit stress damages.

In this study, interactive effects of different potassium application and water restrict on: root penetration at Iran. The experimental unit had designed by achieved treatment in factorial on the basis completely randomized block design with three replications. Certain factors including potassium and non-potassium applications (0 and 200 kg/ha), certain field crops (maize, sorghum and millet) and water supply were studied. In this study crops water supply was determined by indicated irrigation conditions by keeping leaf relative water content (RWC) > 95% (non-drought stress condition or irrigation conditions) and drought condition by RWC = 60 -70%. We noticed, however K fertilizer significantly increased the root penetration of plants. Although the non-drought stress treatment significantly increased root penetration and highest root penetration of maize was achieved under irrigation conditions (non-drought), but the highest roots penetration of sorghum and millet were indicated under the drought condition. Whereas K application persist less damaging of drought stress result and it enabled plant to significantly grew its root and penetrating along soil depth under the drought condition. Our finding may give applicable advice to farmers and agricultural researchers for management and concern on fertilizer strategy and carefully estimate soil potassium supply within arid or semi arid regions as most challengeable issues of environmental safety.