Ali Asghar Fozouni; Mohammad Ali Aboutalebian
Abstract
In order to achieve optimum quantitative and qualitative yield of potato in each region, new cultivars need to be compared. As such, this study has been carried out to compare 13 new potato cultivars along with two cultivars of Agria and Banba with each other to identify suitable cultivars for leaf area ...
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In order to achieve optimum quantitative and qualitative yield of potato in each region, new cultivars need to be compared. As such, this study has been carried out to compare 13 new potato cultivars along with two cultivars of Agria and Banba with each other to identify suitable cultivars for leaf area index, agronomic, and qualitative traits under climatic conditions of Razan. The statistical design, used in the present study, has been complete randomized block with three replications. Results show that Manito cultivar has reached the maximum leaf area index later than other cultivars, having 12 tubers per plant, which is 112% and 83% superior to Banba and Agria, respectively. Also, Natascha cultivar with a leaf area index of 3.65 has been 57% and 19% leafier than Agria and Banba, respectively. Tuber weight in Ottawa (157.8 g per tuber) has been 70.5% and 20.4% greater than Agria and Banba, respectively. Manito cultivar yields 71399 kg/ha, which is 123% more than Agria and 70% than Banba. Protein percentage of tubers in this study do not differ among the potato cultivars, while the difference is significant among the potato cultivars in tuber starch percentage and the highest values belong to Manito (18.09%) and Ottawa and Concordia cultivars, in the second and place. Generally, Manitou, Caruso, and Faluca cultivars are recommended for planting in the Razan on the basis of traits of maximum leaf area index, number of tubers per plant, and tuber yield.
Ali sarkhosh; Mohammad Aboutalebian
Abstract
To investigate the effect of on-farm seed priming and different times of nitrogen fertilizer application onmaize Sc 704, an experiment was conducted at Agricultural Research Station, Asadabad- Iran, in 2011 asa factorial in randomized complete block design with three replicates. The first factor was ...
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To investigate the effect of on-farm seed priming and different times of nitrogen fertilizer application onmaize Sc 704, an experiment was conducted at Agricultural Research Station, Asadabad- Iran, in 2011 asa factorial in randomized complete block design with three replicates. The first factor was on-farm seedpriming in 3 levels (prime with tap water, prime with zinc solution and no primed. The second factor wasnitrogen application in 5 levels (without nitrogen application, all nitrogen applied at planting time, 2stages application, 3 stages application and 4 stages application. Results showed that, grain nitrogencontent was highest in zinc solution priming and 4 stages nitrogen application (1.6%). Maximum grainyield was achieved by triple nitrogen stages application and zinc solution priming combination (10796kg/ha) that increased about 77% to no-primed and no-nitrogen treatment. In this experiment, seed primingand splitting of nitrogen application time caused decrease in the harvest index. Priming increasedagronomic nitrogen efficiency, partial factor productivity of nitrogen and recovery efficiency of grainnitrogen 32.7, 19.6, 30% compare with no-primed treat respectively and triple stages nitrogen applicationincreased these indexes 117.6, 23.6, 450% respectively in compare with one stage application of nitrogenfertilizer.