Effect of Nitrogen and Cycocel on Nitrogen Content, Remobilization and Use Efficiency in Safflower under Different Planting Densities

To study the effect of cycocel, nitrogen and planting density on nitrogen (N) content, remobilization and use efficiency of Esfahan 14 safflower cultivar, a field experiment was carried out as a factorial split-plot based on randomized complete blocks design with three replications at Research Farm of College of Agriculture, Yasouj University, in summer of 2010. Main plots were the factorial level of N (50, 100 and 150 kg/ha) and level of cycocel (0 and 10- 6 M ) and subplots were planting density (20, 25 and 33.3 plants / m2). Results showed that the highest N remobilization (1.21%) was gained from 10-6 M cycocel application and the highest amount of N and planting density. The highest N treatment, along with planting density of 25 plants/m 2, produced the highest seed protein (14%) and aerial N at flowering stage (2.15%). The highest grain yield (3146 kg/ha) and N use efficiency (62.9 kg/kg) was obtained from 10-6 M cycocel, lowest N level and 25 plants/m 2. In general, increasing N application and planting density, with cycocel application, increases shoot N content and remobilization. However, lower amount of N application is associated with higher N use efficiency and seed yield

Effect of Planting Date on Physiological and MorphologicalCharacteristics of Four Canola Cultivars in Yasouj

In order to study the physiological and morphological characteristics of canola cultivars at different planting dates, an experiment was carried out in 2008-2009 at the Agriculture Research Station of Yasouj. A factorial with Randomized Complete Block Design with four replications was conducted. Four planting dates (September 12, September 22, October 2 and October 12) and four cultivars (Zarfam, Okapi, Elite and SLM-046) were used in this study. Results showed that cultivars and planting dates had significant effects on more characteristics. In addition, interaction of planting date and cultivar was significant on plant height, height to lowest silique, number of branches, growth indices and grain yield. Zarfam and Elite cultivars had lower initial fluorescence (Fo) and higher maximum fluorescence (Fm) and photochemical capacity of photosystem II (Fv/Fm) than Okapi and SLM-046 cultivars. Elite cultivar at September 12 planting date had the highest plant height (173 cm) and height to lowest silique (87.5 cm) and Okapi cultivar at October 12 planting date showed the lowest plant height (91 cm) and height to lowest silique (43.7 cm). At September 12 planting date, Elite cultivar had the greatest leaf area index (5.21) and grain yield (5231 kg/ha). At other planting dates, Zarfam cultivar because of priority in leaf area index, crop growth rate and total dry matter have the greatest grain yield than other cultivars. In general, seems at September 12 planting date, Elite cultivar and for delayed sowing, Zarfam cultivar had better reaction than other cultivars

Effect of Nitroxin Bio-Fertilizer Application Accompanied with Nitrogen on Canola (Brassica napus) Yield Quantity and Quality

In order to investigate the effect of chemical and biological nitrogen fertilizer on canola, a field experiment was conducted as a split plot based on a randomized complete block design with three replications at the research station of the Faculty of Agriculture, Yasouj University, located in Deshtrum region, in 2019. The main factor consisted of nitrogen fertilizer (zero, 25, 50, 75, 100 and 125 kg/ha of pure nitrogen from urea source) and the secondary factor consisted of nitroxin biofertilizer contained Azotobacter and Azospirillium bacteria (use and non-use). The results showed that nitrogen fertilizer and nitroxin had a significant effect on all investigated traits. Nitrogen fertilizer significantly increased plant height, number of lateral branches, chlorophyll index and oil yield. The highest grain (8790.60 kg/ha) and biological (23910.93 kg/ha) yield were obtained in 125 kg/ha of nitrogen and the use of nitroxin. With the consumption of 125 kg/ha of nitrogen and nitroxin, the lowest percentage of seed oil, and contrastingly the highest percentage of seed protein (36.65%) was obtained. In general, combined application of biofertilizer with chemical nitrogen increased grain, biological and oil yield. Nitroxin bio-fertilizer could reduce the consumption of chemical nitrogen fertilizer. The results showed that there was no significant difference between the application of 50 kg/ha of nitrogen + bacteria and the application of higher levels of nitrogen (75, 100 and 125 kg/ha) alone in most of the investigated traits

Study of the Quantitative and Qualitative Traits of Four Soybean (Glycine max L.) Cultivars under Different Sowing Dates in Shahrekord Region

To study the effect of sowing date on quantitave and qualitative traits of soybean in Shahrekord region, an experiment was performed as split plot based on randomized complete blocks design with four replications at Agricultural and Natural Resources Research Centre of Chaharmahal-va-Bakhtiari, Shahrekord, in 2008. Four sowing dates (May 5, May 20, June 4 and June 19) and four varieties (M9, M7, L17 and Williams) were selected as main and sub plots, respectively. Results showed that maximum number of pods per plant, seeds per plant and biological yield were observed for M9 cultivar at 20 May sowing date. This sowing date had also the highest seed weight, oil percent and biological yield comared to other dates. The maximum protein percent was observed in June 4 (37.6%) and June 19 (38.4%) sowing dates. There was no significant difference between cultivars for oil and protein percent. There was no significant difference between three planting dates of May 5, May 20 and June 4 for seed yield. But minimum seed yield belonged to June 19 sowing date. In general, the M9 cultivar, with 2896.1 kg/ha seed yield, and then M7 cultivar with 2597.7 kg/ha seed yield, are recommendable as suitable soybean cultivars for cultivation in Shahrekord region