Comparison of two mycorrhizal species in improving the absorption of nutrients and beneficial indicators of linseed (Linum usitatissimum L.) and fenugreek (Trigonella foenum-graecum L.) intercropping

This study was used in order to diversify agricultural system by using fenugreek in mixed cultivation with linseed with the aim of determining the effect of mycorrhizal fungus symbiosis on the plant elements and the effect on intercropping indices. The farm factorial experiment was conducted as a randomized complete block design with three replications and 15 treatments in Yasouj University in 2016. The experimental factors include the bio-fertilizer in three levels (control, the use of mycorrhizal fungus Funneliformis mosseae and the use of mycorrhizal fungus Rhizophagus irregularis) and cultivation ratios at 5 levels (pure cultivation of oilseed and fenugreek and mixed cultivation of linseed and fenugreek with ratios of 1:1, 1:2 and 1:2). The results showed that the application of mycorrhiza along with mixed cultivation improved the absorption of macro and micro elements, so that the highest concentration of iron, nitrogen and potassium in oilseeds leaves was seen in the ratio of 1:1 mixed culture along with mycorrhiza fertilizer. Also, mycorrhizal fungus F. mosseae together with 1:1 mixed culture brought the most nitrogen, potassium and phosphorus of fenugreek leaves. The interaction of mixed cropping and mycorrhizal fertilizer was not significant on any of the indicators of the usefulness of mixed cropping; but the use of mycorrhizal fertilizers increased the amount of actual lost yield and the ratio of the total land. In general, the use of mycorrhizal fertilizer, in addition to improving the absorption of elements, made the mixed cultivation of flax and fenugreek superior to their single crop.