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 ...
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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.