Kamal Sadat Asilan; Seyed Ali Mohammad ModarresSanavy; Saeed Ghahary; Mehrdad Moradi Ghahderijan; Mahdi Panahi
Volume 12, Issue 4 , January 2015
Abstract
In order to study theability of hull extracts of Iranian rice cultivars on germination and seedling growth of barnyard grass, two laboratory and greenhouse experiments were conducted ina completely randomized block design with factorial arrangement and three replications. This study wasundertaken to ...
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In order to study theability of hull extracts of Iranian rice cultivars on germination and seedling growth of barnyard grass, two laboratory and greenhouse experiments were conducted ina completely randomized block design with factorial arrangement and three replications. This study wasundertaken to evaluate the allelopathic potential aqueous extract of 20 hull rice (Oryza sativa) cultivars on growth factor of barnyard grass (Echinochloa cruss-galli). This research was performed in 2007 at the Department of Agronomy of Tarbiat Modares University. Aqueous extract of hull rice in four concentrations (control, 5, 10 and 15%) were used for germination test and seedling growth of barnyard grass seeds. In the laboratory, we found that a few varieties product and released allelochemical for inhibiting and more cultivars stimulation growth of barnyard grass. Khazar variety showed the highest inhibition on germination percentage, germination rate, shoot length, root length, root dry weight and shoot dry weight. In addition, the breeding and domestic varieties were inhibitor and simulator of barnyard grass respectively. In the field experiment, Khazar cultivar reduced germination percentage, germination rate, root length, root dry weight, total dry weight and shoot dry weight of barnyard grass and Neda cultivar showed the greatest inhibition on shoot length. This study show that there are differences among the varieties of rice for allelopathic inhibition of barnyard grass seeds and genetic and morphological rice characteristics could be used as selection markets for allelopathic rice varieties and maybe used as a natural herbicide to reduce the population of barnyard grass in field. Increasing concentration of aqueous extract increased effects of inhibition and stimulation of various cultivars on barnyard grass. Survey morphological and genetic traits of rice varieties showed an existing relationship allelopathy potential of rice on barnyard grass.
Sanaz Shoghi Kalkhoran,; Amir Ghalavand; Seyed Ali Mohammad Modares Sanavi
Volume 9, Issue 2 , January 2012
Abstract
In order to study the quantitative and qualitative characteristics of sunflower (Alestar hybrid) under the effects of bio fertilizer and winter wheat as a green manure,in combination with the integrated nitrogen sources (chemical-farmyard manure, FYM), an experiment was carried out on experimental farm ...
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In order to study the quantitative and qualitative characteristics of sunflower (Alestar hybrid) under the effects of bio fertilizer and winter wheat as a green manure,in combination with the integrated nitrogen sources (chemical-farmyard manure, FYM), an experiment was carried out on experimental farm at the Faculty of Agriculture of Tarbiat Modares University in Tehran (Iran) during 2008. The experimental design was a split plot in a randomized complete blocks design with three replications in which seven fertilizer treatments, namely F1 (100% FYM), F2 (75% FYM + 25% chemical), F3 (50% FYM + 50% chemical), F4 (25% FYM + 75% chemical), F5 (100% chemical), F6 (50% FYM + 50% chemical + green manure) and F7 (75% FYM + 25% chemical + green manure), were randomized to the main plot units and two levels of bio fertilizer I1 (inoculation) and I0 (control) to the sub-plot units. The results revealed that for grain and biological yield, yield components in integrated systems was significantly more than in organic and chemical systems. The highest grain yield (3034.5 kg/ha), head weight (90.06 g), head diameter (19.40 cm), 1000 seed weight (67.99 g) and seed number in head (925.5) were obtained in the F6treatment (F6>F3>F4>F7>F2>F5>F1). Inoculation of bio fertilizer improved the grain yield and yield components, oil and protein content and the oil quality of sunflower compared with untreated plants. Saturated fatty acids decreased significantly, while unsaturated fatty acids (linoleic acid and oleic acid) increased in response to raising the organic manure and using bio fertilizer.
Majid Gholamhoseini; Amir Ghalavand,; Seyed Ali Mohammad Modarres Sanavy; Ehsan Jamshidi
Volume 5, Issue 1 , October 2007
Abstract
In order to study the effect of Iranian zeolite application namely clinoptilolite in animal manure, on yield and yield component of sunflower under different irrigation regimes, an experiment was conducted during 2005-2006 year, at Research Field of Tarbiat Modares University, Faculty of Agriculture, ...
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In order to study the effect of Iranian zeolite application namely clinoptilolite in animal manure, on yield and yield component of sunflower under different irrigation regimes, an experiment was conducted during 2005-2006 year, at Research Field of Tarbiat Modares University, Faculty of Agriculture, located at 16 KM Tehran-Karaj Highway, as spilt plot arrangement in randomize complete block design with four replications. Irrigation regimes including: irrigation after consuming 35% of available soil moisture (W1), irrigation after consuming 70% of available soil moisture (W1) that were randomized to the main plot units and subplots were different fertilizer treatments including: providing 100% N of plant requirement from urea chemical fertilizer (F1), providing 60% and 40% N plant requirement from urea chemical fertilizer and animal manure respectively (F2), providing 60% and 40% plant requirement N from urea chemical fertilizer and animal manure compost respectively accompany with zeolite in amount of 5% of animal manure weight (F3), providing 60% and 40% plant requirement N from urea chemical fertilizer and animal manure compost respectively accompany with zeolite in amount of 5% of animal manure weight (F4), providing 60% and 40% plant requirement N from urea chemical fertilizer and animal manure compost respectively accompany with zeolite in amount of 5% of animal manure weight (F5). Result showed that different irrigation regimes and fertilizer levels and their interactions significantly affected on grain yield, oil percent and yield, protein percent, 1000 seed weight, head diameter, grain number in head, final dry matter and leaf chlorophyll content at flowering stage. The highest grain yield was obtained from F4 and F5 treatments in W1 irrigation regime with of 2641.6 and 2602.4 kg/ha respectively. Therefore the best treatments in this experiment were W1F4 and W1F5.
