Browsing by Author "Kazemeini, Seyed Abdolreza"
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Item Chemical control of downy brome, littleseed canarygrass and green foxtail in rapeseed in southern ıran(Uludağ Üniversitesi, 2012) Valaie, Niusha; Kazemeini, Seyed Abdolreza; Hamzehzarghani, HabiballahIn order to investigate the effect of herbicide and choice of adjuvant on three grass weed species; downy brome (Bromus tectorum), littleseed canarygrass (Phalaris minor) and green foxtail (Setaria viridis); a greenhouse study was conducted in a factorial experiment laid out in randomized complete block design. Treatments included herbicide at five levels (propaquizafop, fluazifop-p-butyl, cycloxydim, sethoxydim and quizalofop-p-ethyl) each applied at two concentrations and either with/without adjuvant (volck or citoweet). The performance of herbicides and adjuvants was evaluated by rating the effect of treatment on an ordinal scale in each experimental unit at 10 and 20 days after planting (DAP). The results showed that herbicide efficiency rating distributions were significantly different between two times (10 and 20 DPA). Application of quizalofop-p-ethyl and propaquizafop were recorded as the best herbicide treatments in controlling the weeds used in this study 10DAP, however the difference between herbicides faded at 20 DAP. Also, no significant effect was found for concentration of herbicides and type of adjuvant. In addition, 30 days after herbicide application, maximum dry weight and leaf area of canola was recorded for cycloxydim, propaquizafop and quizalofop-pethyl, respectively whereas minimum dry weight and leaf area of canola was observed in pots sprayed with sethoxydim and fluazifop-p-butyl respectively.Item Efficacy evaluation of sulfosulfuron, metsulfuron-methyl plus sulfosulfuron, mesosulfuron-methyl plus ıodosulfuron-methyl and ıodosulfuron plus mesosulfuron herbicides in winter wheat (triticum aestivum L.)(Uludağ Üniversitesi, 2013) Malekian, Babak; Ghadiri, Hossein; Kazemeini, Seyed Abdolreza; Edalat, MohsenIn order to investigate the effect of sulfosulfuron, metsulfuron-methyl plus sulfosulfuron, mesosulfuron-methyl plus iodosulfuronmethyl and iodosulfuron plus mesosulfuron on weed control and wheat biological and grain yield, a two-year field experiment was conducted in Shiraz, Iran, during 2011-2012 and 2012-2013 growing seasons. The experimental design was randomized complete blocks with four replications. Treatments were sulfosulfuron at 18, 20.25 and 22.5 g a.i. ha -1 , metsulfuron-methyl plus sulfosulfuron at 28, 32 and 36 g a.i. ha -1 , mesosulfuron-methyl plus iodosulfuron-methyl at 14.4, 18 and 21.6 g a.i. ha -1 , iodosulfuron plus mesosulfuron at 18, 24 and 30 g a.i. ha -1 and two weedy and weed free checks. Compared with the weedy check, application of herbicides in both growing seasons reduced weed biomass and increased wheat biological and grain yield. Among herbicide treatments, metsulfuron-methyl plus sulfosulfuron at 36 g a.i. ha -1 reduced weed dry matter by 98. 6% and 97.55% in 2011-2012 and 2012-2013, respectively, and the lowest weed dry matter was observed with this treatment. In both years, maximum wheat biological yield was obtained in weed free check that was not significantly different from metsulfuron-methyl plus sulfosulfuron at 36 g a.i. ha -1 . The highest wheat grain yield was obtained with metsulfuron-methyl plus sulfosulfuron at 36 g a.i. ha -1.Item Impact of sowing date and tillage method on morphophysiological traits and yield of corn(Uludağ Üniversitesi, 2017-04-05) Zaremohazabieh, Sara; Kazemeini, Seyed Abdolreza; Ghadiri, Hossein; Edalat, MohsenEnvironmental variations related with different sowing dates have an altering effect on the growth and development of corn plants. A field experiments were conducted to evaluate the effect of sowing date and tillage method on corn growth and yield. The treatments included two tillage systems (conventional and no tillage) and seven sowing dates (11-May, 18-May, 25-May, 1-Jun, 8- Jun, 15-Jun and 22-Jun). The interaction between tillage method and sowing date showed that the highest kernel yield (KY), biological yield (BY) and harvest index (HI) were observed at first sowing date and conventional tillage method and the lowest KY, HI and BY were obtained in no-tillage method and latest sowing date in both years. Delay in sowing from 11-May to 22-Jun decreased significantly the plant height, leaf number, leaf area index and yield by 6.43, 7.98, 17.36 and 42.7% in 2014 and 7.93, 8.87, 14.88 and 40.01% in 2015, respectively. The highest crop growth rate (CGR) was observed in conventional tillage (56 and 49 (g day 1m -2 )) as compared to no-tillage (45.7 and 46.5(g day-1m -2 )) in 2014 and 2015, respectively. The leaf area index (LAI) had a positive and significant correlation with corn height, leaf number and yield.Item Interrelationships between nitrogen rate and wild oat density on oilseed rape yield components(Uludağ Üniversitesi, 2016-10-07) Karimi, Hadis; Kazemeini, Seyed Abdolreza; Valaie, NiushaIn order to evaluate the effect of nitrogen on oilseed rape yield and yield component under wild oat densities, a field experiment was conducted in Shiraz University, Iran, during 2008-2009 and 2009-2010 growing seasons. The experimental design was split plot with three replications. Treatments included four nitrogen levels (zero, 50, 100, and 150 kg ha-1 ) and four densities of wild oat (zero, 15, 30, and 45 plants m 2 ). The result showed that number of pods per main stem and secondary branches, number of seeds per main and secondary pods, 1000-seed weight, grain and biological yield was significantly increased by enhancement of nitrogen levels from zero to 150 kg ha-1 at weed-free treatments. Also, weed interference significantly reduced grain yield up to 41% under 50 and 100 kg ha-1 nitrogen application in comparison 150 kg ha-1 . Regardless of oilseed rape yield, weed dry weight was significantly increased with increasing the nitrogen levels, suggesting that high levels of nitrogen favor the crop over the weeds. This experiment suggested that oilseed rape grain and biological yield was affected more by high nitrogen levels at maximum weed density.Item Water stress and plant within row spacing effects on safflower yield in competition with wild oat(Uludağ Üniversitesi, 2015-10-08) Naderi, Ruhollah; Kazemeini, Seyed Abdolreza; Noroozi, MajidA Two-year field experiment was carried out in 2009 and 2010 at Agricultural College of Shiraz University, Iran to evaluate the effects of different water stress and plant within row spacing on safflower yield and photosynthetic characteristics in weedy conditions. Results showed that drought stress at 75 % FC (field capacity) caused a reduction of 15 % in seed yield but this treatment had no significant difference with well watered. Yield reduction of 31 % was also observed at 50 % FC. The greatest seed yield was also found at plant within row spacing of 5 cm (302.6 ±23 kg m-2 ). The yield reduction caused by weed competition was 57%. Compared to well water, at 75 % FC and 50 % FC Photosynthesis rate of safflower reduced 26.18 and 65.49 %, respectively. Weeds competition reduced safflower photosynthesis rate significantly about 25 %. Transpiration in weedy plots was also significantly lower than that of weed free plots (33%). Compared to well-watered, water stress at 75 % and 50 % FC reduced wild oat biomass by 29 % and 43 %, respectively. Increasing within row spacing from 5 cm to 10 cm and 20 cm caused an increase in wild oat biomass by 30% and 40%, respectively.