Mahdi Mehrandesh; Mohammad Galavi; Mahmoud Ramroudi; Mohammad Armin
Abstract
In order to investigate the effect of different nutrition systems (chemical, organic, chemical+organic, and control) on quantitative and qualitative characteristics of sugar beet in various planting methods (direct planting, potting, and transplanting), an experiment has been conducted as split plot ...
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In order to investigate the effect of different nutrition systems (chemical, organic, chemical+organic, and control) on quantitative and qualitative characteristics of sugar beet in various planting methods (direct planting, potting, and transplanting), an experiment has been conducted as split plot in randomized complete block design with three replicates between 2016 and 2018 in a field, 75 km northwest of Sabzevar. The results show that in the first year, the highest root yield (84.34tha-1) has been obtained from the potting method and chemical along with organic fertilizer application. In the second year, the highest yield (82.96tha-1) belongs to the chemical and organic fertilizer treatment in transplanting method. In both years, the highest sugar content has been obtained from control treatment and direct planting, with transplanting method having the highest sugar yield in both years (13.29 and 14.44 tha-1, respectively). Transplanting and potting method have had more root impurities than direct cultivation. Among nutrition systems, the highest root impurities is obtained in the combination of chemical and organic treatment. Direct culture and control produce the highest alkalinity index. Overall, despite the increase in root impurities in transplanting or potting along with chemical with organic treatment, these treatments produce the highest sugar yield. Accordingly, chemical and organic fertilization along with transplanting could be recommended to produce the highest root and sugar yield.
Laila Alizad; Marefat Mostafavi Rad; Kayvan Aghaei
Abstract
This experiment was performed to evaluate the effect of nitrogen source type and plant growth promoting bacteria on yield and its attributes of Talesh local garlic as split plot arrangement based on randomized complete block design with three replications in Rasht during the 2016-2017 cropping season. ...
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This experiment was performed to evaluate the effect of nitrogen source type and plant growth promoting bacteria on yield and its attributes of Talesh local garlic as split plot arrangement based on randomized complete block design with three replications in Rasht during the 2016-2017 cropping season. Three nitrogen sources of vermicompost (15 ton/ha), nitrogen (100 kg /ha), integrated utility of vermicompost (7.5 ton/ha) with nitrogen (50 kg /ha) as main plot and ten preparation of plant growth promoting including of non-inoculation (as check), Azospirillum brasilense, Azospirillum lipoferum, Pseudomonas putida, Pseudomonas fluorescens, Azotobacter, Azospirillum + Pseudomonas, Azospirillum + Azotobacter, Pseudomonas + Azotobacter, Azospirillum + Pseudomonas + Azotobacter as sub plot comprised experimental treatments. The greatest bulb yield was obtained under the usage of 100 kg nitrogen per hectare as urea fertilizer and simultaneous application of Pseudomonas and Azospirillum spp. There was a positive and significant correlation between bulb yield and all traits such as biological yield, bulb diameter, bulb height, clove numbers per bulb, clove weight, dry weight of bulb, dry weight of stem, leaf numbers per plant and plant height except bulb shell layers. Also, the correlation between yield attributes such as clove numbers per bulb, clove weight, bulb diameter, bulb height and vegetative characteristics of bulb plant was positive and significant. In general, bulb yield and its attributes showed different responses to nitrogen sources and plant growth promoting bacteria. Application of Azospirillum + Pseudomonas could be recommendable to improve bulb yield in conventional agriculture and under region climatic condition.
Jalal Jalilian
Abstract
To determine the effect of farm slopes on yield and some agronomic traits of wheat under different fertilizer treatments, an experiment was performed as split plot based on randomized complete block design with three replications in Piranshahr in 2011-2012. Treatments consisted of farm slope at four ...
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To determine the effect of farm slopes on yield and some agronomic traits of wheat under different fertilizer treatments, an experiment was performed as split plot based on randomized complete block design with three replications in Piranshahr in 2011-2012. Treatments consisted of farm slope at four levels: (zero, 3, 6 and 10 %) as the main plots and combination of different fertilizer at five levels: (control, application of biofertiliozer (Nitroxin), manure, chemicals (N and P) and integration of biological, manure and chemical as sub plots. Results showed that the highest (7.67 t/ha) and lowest (3.68 t/ha) seed yield obtained from farm slope 0 and 10%, respectively. In fact, with increasing of the farm slope, the yield components decreased which lead to 52% and 38% reduction in grain yield and total biomass of plants located on a slope of 10 percent than the control plants. Also, the applications of integrated fertilizer treatments had the most effect on morphological traits and yield components of wheat that increased 12.58 and 13.58 percent the seed yield and total biomass compared to the control plants.