تاثیر اسید هیومیک های استخراج شده از ورمی کمپوست های مختلف بر شاخص های رشد کلزا

Rape can hope to provide in order to eliminate the country's needs through imports Humic acid can behave like growth substances .this study was performed with the aim of humic acid which extracted from enriched vermicompost with bacterial and fertilizer treatments on growth and yield of oilseed rape plant. Humic acid foliar samples with 4 levels of 0, 200, 400 and 600 ppm were used in 5 steps. Height, leaf area index, SPAD, dry weight of root and shoot was measured after completion of the cultivation. Results showed that treatments HA NSP (humic acid extracted from vermicompost that enriched with nitrogen, sulfur and phosphorus) and HA AS (humic acid extracted from vermicompost that enriched with Pseudomonas and Azotobacter) maximum height, SPAD index and leaf area index, dry weight shoots and roots were treated with HA N (vermicompost enriched with humic acid extracted from urea) had the lowest value of the index. Parameters were significantly increased with increasing surface treatments. Finally we found the properties of extracted humic acid have a direct impact on its performance.