Samira Mataei; Mehdi Tajbakhsh; Reza Amirnia; Babak Abdollahi Mandoulakani
Abstract
In order to evaluate effects of iron, zinc and manganese, and the methods of applying them on yield and yield components of sweet corn (Zea mays saccharata), an experiment was performed as factorial based on randomized complete block design with four replications at the research farm of Urmia University. ...
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In order to evaluate effects of iron, zinc and manganese, and the methods of applying them on yield and yield components of sweet corn (Zea mays saccharata), an experiment was performed as factorial based on randomized complete block design with four replications at the research farm of Urmia University. Experimental factors were micronutrient fertilizers with four levels (control, iron, zinc and manganese) and micronutrient applying method with two levels (foliar and soil application). Soil application of micronutrients before sowing and foliar application of these elements in two stages (knee Stage and before tasseling stage) were applied. Results indicated that interaction between experimental factors on biological and protein yield and micronutrients use efficiency in grain yield was significant. Also, in micronutrients applying method, foliar application compared to soil application was caused increasing in grain yield, leaf chlorophyll, soluble sugars yield, sugar harvest index and micronutrients use efficiency in sugar yield. Applying three types of micronutrients were increased significantly leaf chlorophyll, grain soluble sugars yield and sugar harvest index compared to control .Grain harvest index was not affected by any of the experimental factors. Based on results, application of micronutrient elements enhance the quality and economic yield of sweet corn and foliar application of micronutrients was showed better results than soil application.
Musa Izadkhah; Mehdi Tajbakhsh; Reza Amernia
Abstract
Abstract
Suitable seedling is one of the most important factors of onion growth and yield in transplanting method (TM). In order to investigation effects of different seedling size and age on marketable yield , biological yield, harvest index and some qualitative characters in onion an experiment was ...
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Abstract
Suitable seedling is one of the most important factors of onion growth and yield in transplanting method (TM). In order to investigation effects of different seedling size and age on marketable yield , biological yield, harvest index and some qualitative characters in onion an experiment was couducted at the Agricultural research Center of East Azarbayjan in 2008. The factorial was conducted based randomized complete block design (CRD) with four replications. The experimental factors were four seedling size 9, 12, 15 and 20 cm and two varieties of onion: Azar-shahr (red hull and long – day) and Gooli-Ghesseh Zanjan(bright-red skin, intermediate- day). In this research characters as: marketable yield (MY), biological yield (BY), harvest index(H.I), percentage of class I, II and III onion, bulb fresh weight(BFW), bulb dry weight(BDW), percentages of dry matter (DM) and total soluble solids (TSS), specific gravity (SG), bulb volume(BV), texture tightness(TT) and bulb shape index (BSI) were studied. Analysis of variance for the measured traits indicated that except for the SG, other studied characters were significant in 1% level. With increasing of seedling length except for BSI all evaluated characters increased. The Red Azar-shahr was superior cultivar in all attributes, and Gooli-Ghesseh Zanjan was lower. Comparsions of the means of treatments show that the seedling size of 20cm had highest values of MY, BY, H.I in Azar-shahr(41.29 t/ha, 233.84 g/p, 89.57% respectively) and lowest was seedling size of 9cm in Gooli-Ghesseh Zanjan(10.91t/ha, 95.89 g/p, 65.69% respectively). Also among of the cultivars that except for the bulb volume, other traits were significant. The seedling size × cultivar interaction were not significant. The data suggest that seedling size of 20cm was superior than other seedling size. Therefore seedling size of 20cm is recommended of onion planting in TM for the places with the environmental same conditions of this experiment.
Keyword: Onion, Transplanting method, Seedling size, Total yield, Bulb characteristics
