فهرست نشریات علمی دسترسی آزاد ایران

Soil fertility management through use of organic and biological fertilizers is a crucial component of sustainable agriculture. A greenhouse experiment was carried out to investigate the effect of vermicompost and plant growth promoting rhizobacteria (PGPR) on the growth and nutrient uptake of sesame seedlings. This experiment was conducted in factorial based on completely randomized design with four replications. Experiment factors included four levels of (zero (V0), 1 (V1), 2 (V2) and 4 percent (V3)) and five bacterial levels (without bacteria (B0), inoculation with an isolate from fluorescent pseudomonads group, having ability to dissolve inorganic phosphate (B1), Azospirillum sp. (B2) and Azotobacter sp. (B3) with ability to fix nitrogen, and a mixture of three bacteria (B4). The results showed that the main effects of vermicompost and PGPR significantly enhanced the leaf area, stem diameter and chlorophyll index in comparision to the control. Also, the combined application of vermicompost and PGPR significantly increased the shoot dry weight, plant height, number of leaves and nitrogen, phosphorus, iron, manganese, zinc and copper uptake in sesame seedling (P<0.01). The maximum shoot dry weight, number of leaves and nitrogen, iron, manganese, copper and zinc contents were obtained in the treatment containing Azospirillium isolate using 4% of vermicompost. This trearment enhanced the shoot dry weight from 0.148 to 3.49 mg kg-1and the shoot nitrogen content from 1.96 to 96.8 mg pot-1. The highest phosphorus uptake was observed in the treatment with application of 4% vermicompost and Pseudomonas isolate. This trearment increased the shoot phosphorus content from 0.76 to 12.8 mg pot-1.