Behrooz Dolatparast; Farzad Hosseinpanahi; Adel Siosemardeh; Hamed Mansory
Abstract
Considering the importance and value of water and optimal use of nitrogen for maintaining production productivity and simultaneously reducing the negative environmental effects, two experiments have been conducted in 2017-2018 and 2018-2019 cropping seasons in the research farm of the Faculty of Agriculture, ...
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Considering the importance and value of water and optimal use of nitrogen for maintaining production productivity and simultaneously reducing the negative environmental effects, two experiments have been conducted in 2017-2018 and 2018-2019 cropping seasons in the research farm of the Faculty of Agriculture, University of Kurdistan. The experiments are performed as a split plot in a randomized complete block design with four replications. Experimental treatments include the different levels of irrigation as the main plots (25% (W1), 50% (W2), 75% (W3), and 100% (W4) of crop water requirement) and different levels of nitrogen fertilizer as sub-plots (25% (N1), 50% (N2), 75% (N3), and 100% (N4) based on crop nitrogen requirement). Results show that all the studied traits with the exception of the time of reaching the maximum pod area index are affected by the main and interaction effects. The highest grain yield is obtained in W4N4 treatment (5069 kg.ha-1) and the lowest grain yield in W1N1 and W1N2 treatments at 880 and 899 kg.ha-1, respectively, which has been decreased by 82.6% and 82.2%, compared to the control, respectively. The grain and biological yield of W4N3 (4826 and 17589 kg.ha-1) and W3N4 (4712 and 17657 kg.ha-1) treatments, represent 25% reduction in nitrogen consumption and 25% reduction in water consumption, respectively compared to the control. W4N4 is recognized as the superior treatment in this study for improving productivity.
Seyedahmad Kalantarahmadi; Jahanfar Daneshian; Habib Mobinirad
Abstract
In order to develop winter cultivation and improve crop rotation in the region, an experiment has been conducted to evaluate the effects of sowing date on sunflower cultivars seed yield. It is a split-plot based on completed randomized blocks design with four replications in Safiabad Agricultural and ...
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In order to develop winter cultivation and improve crop rotation in the region, an experiment has been conducted to evaluate the effects of sowing date on sunflower cultivars seed yield. It is a split-plot based on completed randomized blocks design with four replications in Safiabad Agricultural and Natural Resources Research and Education Center of Dezful and has taken place during two years (2015-2016). The main plots are consisted of four sowing date levels (23rd Jan, 6th Feb, 20th Feb, and 6th Mar), while the sub plots include nine levels of cultivars (Azargol, Armavirski, Barzegar, Progress, Record, Shams, Farokh, Ghasem, and Gabor). Delay in the sowing date has decreased growth period length and plant height, with the greatest number of seeds per capitulum (684.17) belonging to record cultivar on the first sowing date in the first year and the maximum one (767.47) occurring again to this cultivar on the third sowing date in the second year. The maximum seed yield in the first (3850 kg.ha-1) and second (4088 kg.ha-1) year belong to the first sowing date (23rd Jan) and Azargol cultivar. Based on the results, Azargol cultivar have had the lowest rank, being considered as the cultivar with the highest seed yield on all sowing dates, followed by Record and Armavirski, in the second and third placed, respectively. In terms of stability, considering that Farrokh cultivar also has had the lowest standard deviation, it has been selected as the most stable cultivar.
saeedeh kermani poorbaghaei; Majid Pouryousef; Alireza yousefi; masoud rafie
Abstract
This study was carried out to assess yield, yield components and quality traits of dragon’s head (Lallemantia iberica L.) ecotypes’ seeds grown using some anti-transpirant agents in rainfed system in two regions of Iran including Karaj & Khorramabad in 2018. The experiment was performed ...
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This study was carried out to assess yield, yield components and quality traits of dragon’s head (Lallemantia iberica L.) ecotypes’ seeds grown using some anti-transpirant agents in rainfed system in two regions of Iran including Karaj & Khorramabad in 2018. The experiment was performed based on a randomized complete block design (RCBD) with a 4×3 factorial arrangement consisting of three replications. The first factor consists of four different ecotypes of dragon’s head (Kurdistan, Takab, Nazarkahrizi and Kalibar) and the second factor including three anti-transpirant compounds (kaolin with a concentration of 5 Percent, chitosan with a concentration of 1 Percent and Ista with a concentration of 2 Percent) and no anti-transpirant (control). The results indicated that the triple interaction of ecotypes, anti-transpirant and location on most of the studied traits was significant. Among anti-transpirant, chitosan had the greatest effect on cultivated ecotype & increased grain, biomass, oil and mucilage yields by 20, 4, 11, and 18 Percent, respectively. Also, Nazarkahrizi, Kalibar, Kurdistan and Takab ecotypes cultivated in Karaj had the highest values in the studied traits under foliar application with anti-transpirant, respectively. According to the studies conducted in this study, the selection of a suitable ecotypes with the region and the use of antiperspirants improve the yield & yield components, quality traits of dragon’s head in rainfed cultivation conditions.
Seyyed Gholamreza Moosavi
Abstract
In order to evaluate the effect of irrigation, humic acid and mycorrhiza application on physiological traits, yield and water use efficiency (WUE) of cotton, an experiment was carried out as a factorial split-plot based on a randomized complete block design with three replications in the research farm ...
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In order to evaluate the effect of irrigation, humic acid and mycorrhiza application on physiological traits, yield and water use efficiency (WUE) of cotton, an experiment was carried out as a factorial split-plot based on a randomized complete block design with three replications in the research farm of Islamic Azad University of Birjand, Iran in 2016. Three irrigation levels (40, 70 and 100 percent of water requirement or PWR) were as the main plot and the combination of two mycorrhiza levels (non- application and application) and two humic acid levels (0 and 10 L. ha-1) were considered as sub-plot. The results showed that mycorrhiza application in conditions of supplying 100 and 70 PWR for the plant significantly increased the chlorophyll index, stomatal conductance, number of boll per m2 and yields of cotton, but the highest increase in these traits was observed in conditions of supplying 70 PWR. Also, the highest WUE in 70 PWR and application of mycorrhiza treatment was obtained.Generally, mycorrhiza application more effectively than the application of humic acid improved physiological traits, yield and WUE of cotton.The results showed that considering the WUE and economic yield of cotton, supplying 70 PWR and mycorrhiza application for this plant in Birjand can be considered.
Navid Yazdani; Shahnaz Hamidi; Karamatollah Rezaei; Kourosh Vahdati; Ali Reza Rahmanian Haghighi
Abstract
Persian walnut (Juglan regia L.) is known as an important horticultural crop not only in Iran, but also in all over the world. Walnut kernels are rich source of functional compounds with a high nutritional value. In the present study, 13 cultivars and superior genotypes of walnut, include ‘Chandler’, ...
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Persian walnut (Juglan regia L.) is known as an important horticultural crop not only in Iran, but also in all over the world. Walnut kernels are rich source of functional compounds with a high nutritional value. In the present study, 13 cultivars and superior genotypes of walnut, include ‘Chandler’, ‘Lara’, ‘Vina’, ‘Pedro’, ‘Ser’, ‘Damavand’, ‘Jamal’, ‘RDM’, B21, K72, Z53, Z60, Z67 were harvested during 2013. Several pomological characteristics and fatty acid profiles of walnuts were analyzed after drying. Average weight of fruit and kernels were varied between 7.6-16.20 g and 3.8-8.7 g, respectively in different cultivars. The oil contents were varied from 54.4 to 72.1%. The results showed that the unsaturated fatty acid (UFA) compounds are prevalent in walnut oils by more than 90% of total fatty acids. Linoleic acid was the major fatty acid reaching the maximum value of 67.3% (cv. Z60) followed by oleic (18.3-34.2%), linolenic (3.1-14.0%), palmitic (6.3-8.5%) and stearic (2.8-4.3%) acids, respectively. The protein content ranged from 12.6 to 19.6%. The highest amounts of kernel and oil percentages were detected in B21 and ‘RDM’ respectively. Also, the highest amount of protein percentage was reported for ‘Jamal’. Also, high rates of poly unsaturated fatty acids (PUFA) were shown in Z53, Z60 and ‘Chandler’. Moreover, the highest amounts of UFA to saturated fatty acids (SFA) were detected in ‘Jamal’, Z67,Z53 and K72.