تأثير نانوحباب اكسيژن بر رشد و جذب فرم‌هاي مختلف كلسيم و آهن در كشت بدون خاك فلفل دلمه‌اي

The use of new an‎d efficient methods in modern agriculture is of great importance in order to increase the yield an‎d improve the quality of greenhouse products, reduce environmental stresses an‎d, as a result, improve economic productivity. In this regard, the present study aimed to investigate the effect of the application of new enrichment technology with oxygen nanobubbles an‎d different sources of calcium an‎d iron in soilless cultivation conditions on growth, yield an‎d quality indicators of bell pepper. The research in research greenhouses was conducted as a factorial experiment in a ran‎domized complete block design with three factors including oxygen nanobubble levels (with concentrations of 0, 10 an‎d 20 mg/L), calcium sources (calcium nitrate, calcium chelate an‎d calcium nanochelate in three concentrations) an‎d iron sources (ferrous sulfate, iron chelate an‎d iron nanochelate in three concentrations) with three replications. The effect of different sources of calcium fertilizer showed that calcium fertilizer in the form of calcium nitrate improved the performance in morphological traits of fruit weight, stem diameter, fruit flesh diameter, soluble solids, root volume, fresh an‎d dry plant weight an‎d the best calcium concentration was 240 mg/L. Also, the effect of different sources of nano oxygen showed that a concentration of 10 mg/L improved soluble solids an‎d a concentration of 20 mg/L improved root volume. The dual effects of nano bubbles 20 mg/L an‎d a source of calcium nitrate fertilizer with a calcium concentration of 200 mg/L had the greatest effect on the traits of fresh an‎d dry plant weight an‎d root volume. Also, calcium nitrate treatment with a calcium concentration of 220 mg/L an‎d nano oxygen 20 mg/L had the greatest effect on the physiological traits of leaf phenol content, leaf calcium percentage, an‎d net photosynthesis rate. The effect of different sources of iron fertilizer showed that iron fertilizer in the form of chelate improved the performance in morphological traits of stem length an‎d diameter, number of leaves an‎d number of fruits, root volume an‎d plant fresh weight, an‎d the best iron concentration was 1.5 mg/L. Also, the effect of different sources of nano oxygen showed that a concentration of 10 mg/L improved the performance of fruit diameter an‎d length, fruit flesh diameter an‎d soluble solids. The dual effects of 0 mg/L nanobubbles an‎d iron chelate fertilizer source with an iron concentration of 1.5 mg/L had the greatest effect on the traits of stem length an‎d diameter, number of leaves, number of fruits, an‎d fruit firmness. Also, iron chelate treatment with an iron concentration of 1.5 mg/L an‎d 10 mg/L nanobubbles had the greatest effect on the physiological traits of chlorophyll a, leaf phenol, antioxidant, leaf transpiration rate, stomatal conductance an‎d leaf iron percentage. In general, the results of the research showed that using oxygen nanobubbles at a concentration of 20 mg an‎d a calcium nitrate fertilizer source with a calcium concentration of 220 mg/L, an‎d oxygen nanobubbles at a concentration of 10 mg/L an‎d an iron chelate fertilizer source with an iron concentration of 1.5 mg/L are recommended for more optimal growth of bell peppers.

مريم حقيقي

حسين شريعتمداري , محمدحسين اهتمام

مهران شيرواني جوزداني , مهدي رحيم ملك