Kambiz Kharazmi; Reza Amirnia; Jalal Jalilian; Mehdi Tajbaksh
Abstract
Due to the high requirement of alfalfa to water, research on the role of organic-biofertilizer and chemical fertilizers in adjustment of low irrigation stress is important, thus, this experiment was conducted as a factorial based on a randomized complete block design with three replications in Agricultural ...
Read More
Due to the high requirement of alfalfa to water, research on the role of organic-biofertilizer and chemical fertilizers in adjustment of low irrigation stress is important, thus, this experiment was conducted as a factorial based on a randomized complete block design with three replications in Agricultural and Natural Resources Research of Khoy in two years (2015-2016). Experimental treatments included irrigation {irrigation at field capacity (control), irrigation at 80% and 60% field capacity} and various fertilizer resources at six level {Mycorrhiza, Nitroxin, Vermicompost, Chicken manure, NPK chemical fertilizer and treatment without fertilizer consumption (control)}. The results of combined analysis showed that irrigation treatment had a significant effect on forage yield, chlorophyll a, b and total chlorophyll, proline, carotenoids, soluble carbohydrates and peroxidase enzyme activity. Regarding the importance of forage production in alfalfa, the results showed that the plant treated with mycorrhiza biofertilizer under full irrigation condition had the similar forage yield as the application of chemical fertilizer, but in both low irrigation conditions, mycorrhiza increase the forage yield by 10.18% in comparison to chemical fertilizer application. Other fertilizer treatments showed different trends in irrigation levels in terms of effect on forage yield, so that under irrigation at 60% field capacity, vermicompost, chicken manure, chemical and control treatments were in a same statistical group. Therefore, considering the disadvantages of using chemical fertilizers, mycorrhiza which has ecological and environmental benefits, can be used in alfalfa cultivation.
Fatemeh Zamani; Reza Amirnia; Esmaeil Rezaei-chiyaneh; Amir Rahimi
Abstract
In order to investigate the effect of biofertilizers on the seed yield and chemical composition of essential oil of fennel (Foeniculum vulgare L.), a field experiment was conducted as factorial based on randomized complete block design with three replications and twelve treatments at the Research Farm ...
Read More
In order to investigate the effect of biofertilizers on the seed yield and chemical composition of essential oil of fennel (Foeniculum vulgare L.), a field experiment was conducted as factorial based on randomized complete block design with three replications and twelve treatments at the Research Farm of the Faculty of Agriculture, University of urmia, Iran during growing season of 2015-2016. The first factor included of three Landraces (Urmia, Hamdan and Germany) and second factor included of four biofertilizers as: complete biofertilizers (consumption of nitrogen, phosphorus, potassium and sulfur supplier bacteria), mycorrhizal fungi (Glomus intraradices), integrated Bacterial biofertilizers with mycorrhizal fungi and control treatment. Results indicated that application of biofertilizers enhanced the seed yield, colonization percentage, nutrients absorption, essential oil content, essential oil yield and essential oil composition. Among treatments, combined usage of biofertilizers showed that great increasing in studied traits than individual consumption. Also, The effect of landrace on all studied quantitative and qualitative traits was significant except for seed nitrogen. Seed yield of the German landrace were higher than Hamedan and Urmia landrace. The main components of the essential oils fennel were; Anethol, Fenchone, Limonene and p-Allylanisole. The highest amount of anethole was found in Urmia landrace in inoculated with mycorrhiza and bacterial biofertilizer. In general, the results showed that the use of biofertilizers had a significant effect on the improvement of quality and quantity of fennel traits.
Hosein Nazari Nasi; Reza Amirnia; Mohammadrez Zardashti
Abstract
In order to study the effects of biofertilizers on the photosynthetic pigments, relative water content (RWC) and grain yield in medicinal pumpkin plants under drought stress condition, experiments were perfumed across two years at research field station of Zanjan University. This experiment was conducted ...
Read More
In order to study the effects of biofertilizers on the photosynthetic pigments, relative water content (RWC) and grain yield in medicinal pumpkin plants under drought stress condition, experiments were perfumed across two years at research field station of Zanjan University. This experiment was conducted as a split plot based on randomized complete blocks design with three replications. The experiment treatments consisted of drought stress as a main plot in four levels (i.e., control, mild stress, moderate stress and severe stress and biofertilizers as a sub-plot (i.e., no inoculation (control), nitroxin, mycorrhizha and thiobacillus)). Results of combined analysis of variance showed a significant association between irrigation regimes and biofertilizers in terms of chlorophyll a, b and grain yield. Under severe stress condition, nitroxin induced 15.78% and 40% growth in terms of chl a and chl b contents and mycorrizha treatment induced 21% and 47% growth in terms of chl a and chl b contents in comparison with the control, respectively. Only mycorrizha treatment had a positive effect on the RWC and carotenoid content (increased 19% and 5.58% in comparison with no inoculation). Regarding positive effects of nitroxin treatment on increasing of grain yield (under moderate and severe stress condition, caused to 13% and 12.6 % increases in grain yield in comparison with the control, respectively), low cost and easy application, use of mentioned treatment can be recommended.