حمید رحیمیان مشهدی Articles List

List of Articles حمید رحیمیان مشهدی

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1 - Interaction between Nicosulfuron dose and timing on Johnson grass and maize competition indices
Fatemeh Eynollahi Mostafa Oveisi Hamid Rahimian Mashhadi

Chemical weed control is a main component of management programs of crop productions. Timely herbicide application significantly increases herbicide efficiency. A field experiment was conducted to study the effect of Nicosulfuron timing and dose on S. halepense competit More

Chemical weed control is a main component of management programs of crop productions. Timely herbicide application significantly increases herbicide efficiency. A field experiment was conducted to study the effect of Nicosulfuron timing and dose on S. halepense competition with maize. Experiment was split-plot in three replications. Main plots were herbicide dose of 0, 1, 1.5, 2, 2.5 kg/ha and sub plots were herbicide timings of 2-4 l, 4-6 l, 6-8 l of maize growth. Growth parameters of maize including height, leaf area (LA) and total biomass (TB) were measured. Results showed, the highest height, LA and TB were obtained from Nicosulfuron application at 1.5 Kg/ha in 2-4 l of maize and no significant difference was shown to herbicide recommended dose or higher. With delay in herbicide application, the height and TB of S. halepense increased and its competition with maize got raised. It caused decrease in maize growth indices. Current study showed main effect of herbicide dose in changing weed-crop interactions. Successful management would change competition in advantage to crops using lower herbicide doses to achieve both economic and environmental purposes in sustainable crop protection. Manuscript profile
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2 - Germination modeling of Eryngium caeruleum seeds with hydro thermal time model
Mohammad Lotfi asle giglo Mostafa Oveisi Hamid Rahimian- mashhadi Behnaz Pourmorad kaleibar Mohammad Hossein Naeimi

This study was conducted to evaluate the effect of temperature and moisture on germination of Eryngium caeruleum seeds as factorial experiment in a completely randomized design with three replications at weed science laboratory, college of agriculture and natural resour More

This study was conducted to evaluate the effect of temperature and moisture on germination of Eryngium caeruleum seeds as factorial experiment in a completely randomized design with three replications at weed science laboratory, college of agriculture and natural resources, university of Tehran. Factors were seven temperatures (5, 10, 15, 20, 25, 30 and 35°c) and seven levels of moisture (0, -2, -4, -6, -8, -10 and -12 bar) and hydro thermal time model used for description of Eryngium caeruleum germination. Germination parameters including base temperature (Tb), optimum temperature (To), the minimum moisture needed for start of germination (Wpb), decreasing coefficient (b) and standard deviation (Sigma) were obtained 2.39, 23.52, -0.93, 0.13 and 0.34 respectively, affected by different levels of temperature and moisture by using hydro thermal time model. The results also showed that germination percentage and rate increased up to -4 bar in base temperature and these germination characteristics reached to their highest level in optimum temperature. According to the results of this study, it can be said that the seeds of Eryngium caeruleum do not have resistance to the water stress at very low and very high temperatures, and have the maximum resistance at 20°c. Manuscript profile

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List of Articles حمید رحیمیان مشهدی