Evaluate Quantitative Yield of Spinach (Spinacia oleracea L.) in Biochar and Mycorrhiza Levels under Greenhouse Conditions

Nowadays, agricultural products are moving towards organic farming in response to consumers' desire for healthier products. One of the ways to produce and increase yield in these conditions is using biological and organic inputs such as biochar and mycorrhiza. Therefore, this experiment was conducted at Safadasht Golazin Agro-industrial in Safadasht, Tehran, in order to investigate spinach yield. The experiment was carried out as split plots in the form of a randomized complete block design in 3 replications. The experimental treatments included four levels of control, two, four, and six tons per hectare of biochar as the main factor and two inoculation levels with mycorrhiza and control as secondary factors. The results showed that the effect of the investigated treatments on the measured traits was significant. The highest plant height (15.24 cm), total chlorophyll (2.44 mg/g fresh weight), root fresh weight (19.56 g), and shoot (30.95 g) at the application level of mycorrhiza and six tons of biochar per hectare was observed. The effectiveness of mycorrhiza increased with the increase of biochar level. In general, the results showed that the synergism effect of biochar and mycorrhiza increased the yield of spinach traits; this synergy can be one of the strategies to reduce the consumption of chemical fertilizers.