Abdollah Hasanzadeh Gorttapeh; Saeid Heydarzadeh; Amir Rahimi
Articles in Press, Accepted Manuscript, Available Online from 08 April 2021
Abstract
Amaranthus is one of the forage plants resistant to environmental stresses. This experiment conducted 2 years in form of a complete random block design based on factorial a with three replications, 3 levels of irrigation (irrigation after depleting 40, 60 and 75% of available water) as the first factor ...
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Amaranthus is one of the forage plants resistant to environmental stresses. This experiment conducted 2 years in form of a complete random block design based on factorial a with three replications, 3 levels of irrigation (irrigation after depleting 40, 60 and 75% of available water) as the first factor and organic (cow manure and phosphate-2), chemical (phosphorus and nitrogen), integrated and control (no fertilizer) fertilizer systems including was the second factor. The results of this study showed that crude protein, digestibility of dry matter, water-soluble carbohydrates, digestible nutrients, relative nutritional value and specific energy of lactation, due to the application of different fertilizer systems in each irrigation level were improved compared to of non-consumption of fertilizer. The performance of biomass and forage protein were increased by 38.89 and 54.37%, 30.60 and 41.23% and 22.20 and 34.92% in optimal, moderate and severe stress conditions respectively in integrated fertilizer system than the control treatment. The results of this study showed the use of organic fertilizers alone or combined with chemical fertilizers improved quantitative and qualitative traits of amaranthus forage irrigation after depleting 40 and 60% of available water. So, optimal use of biological inputs for sustainable agriculture and reduction of pollution caused by the use of chemical fertilizers is recommended.
Mahdieh Fallah; Hashem Hadi; Reza Amirnia; Abdollah Hasanzadeh Gorttapeh
Volume 23, Issue 1 , Winter 2021, , Pages 141-154
Abstract
The present experiment has been conducted as a factorial based on randomized complete block design with three replications in the Agricultural and Natural Resources Research farm of Urmia for two years (2017-2018) to investigate the effect of green manure residues and fertilizer sources on physiological ...
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The present experiment has been conducted as a factorial based on randomized complete block design with three replications in the Agricultural and Natural Resources Research farm of Urmia for two years (2017-2018) to investigate the effect of green manure residues and fertilizer sources on physiological traits, biological yield, and seed oil content of linseed. Experimental factors include green manure in two levels: no green manure and red clover (Trifolium pratense), different sources of fertilizer in four levels: no fertilizer, mycorrhiza, vermicompost and mycorrhiza + vermicompost, both in full irrigation condition and irrigation terminationat the flowering stage. Results of the combined analysis show that the year has a significant effect on chlorophyll a, colonization percentage, grain nitrogen and phosphorus, biological yield, and seed oil. Irrigation termination treatment decreases all traits except proline and soluble carbohydrate contents. Green manure, mycorrhizae, and vermicompost significantly increase the studied traits at both irrigation levels, except for grain nitrogen, not affected by green manure. The application of mycorrhiza+ vermicompost, with or without green manure, is more effective than their individual applications. The dual application results in an increase of 68.98% and 61.34% for biological yield and 11.8% and 4.5% for seed oil, compared to the control in complete irrigation treatment, respectively. In general, green manure, mycorrhiza, and vermicompost can improve the quantitative and qualitative performance of flaxseed in irrigation terminationat the flowering stage.
Alireza Pirzad; Manoochehr Alizade; Abdollah Hassanzadeh Gorttapeh; Reza Darvishzade
Volume 17, Issue 2 , Spring 2015, , Pages 297-311
Abstract
To evaluate the effect of gamma rays on the seeds and amounts of nitrogen on growth and yield of chamomile (Chamomilla recutita synonym Matricaria chamomilla), a factorial experiment was conducted based on randomized complete block design with three replications at the Research Farm of Agriculture College ...
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To evaluate the effect of gamma rays on the seeds and amounts of nitrogen on growth and yield of chamomile (Chamomilla recutita synonym Matricaria chamomilla), a factorial experiment was conducted based on randomized complete block design with three replications at the Research Farm of Agriculture College of Shahid-Beheshti.-Urmia in 2010. Treatments were gamma rays from cobalt-60 on chamomile seeds cv. ‘Bodegold’ (zero, four, eight, 12, 16, and 20 Gray) and different levels of nitrogen (zero, 50, 100, and 150 kg/ha, urea after appearance of the 4th leaf). The highest leaf dry weight per plant (12.5 g) and per hectare (4194 kg/ha), stem dry weight per plant (49 g) and biomass (19995 kg/ha) were obtained at 8 gray and 100, 100, 150, and 150 kg/ha of nitrogen. The highest dried flower yield at the second harvest (104 kg/ha) were obtained from 20 gray by 100 kg/ha nitrogen, and the yield of the third harvest (122 kg/ha) was from 20 gray of gamma irradiation. While, the highest flower yield at the first harvest (419 kg/ha) and total yield (533 kg/ha) were produced from 0 gray and 150 kg/ha nitrogen. Essential oil percent did not affected by treatments, but despite the significant interaction effect of gamma irradiation and nitrogen on the yield of essential oil, means comparison showed no significant differences among treatments. Yield of dried flower in the first harvest, had the greatest impact on the harvest index.