Background & Aim: Cassia angustifolia Vahl is a valuable medicinal plant that it is important for constipation treatment. According to the importance of organic agriculture in increasing the yield of medicinal plants, the effect of bio-fertilizer on quantities yields of Cassia angustifolia Vahl or Senna in Karaj region (Iran) was examined. Experimental: This research was carried out in Randomized Complete Block Design (RCBD) with four replications and 13 treatments in 2009-2010. The seeds of Senna were scratched with H2SO4 (73%), then the bio-fertilizers and chemical fertilizer were added before sowing. The leaf surface and its Chlorophyll content (SPAD) were measured with Delta-T and Chlorophyll-meter. Results & Discussion: The highest effect on quantities yield of plant was obtained from chemical fertilizers treatment. The bio-nitroxin and mixture of two bio-fertilizers (bio-sulfur and bio-phosphate fertilizer) increased quantities yield of this plant. The fertilizer treatments had a significant effect on plant height, stem diameter, chlorophyll content, leaf area, leaf dry weight and leaf fresh weight (ppIndustrial and practical recommendations: Additive Nitroxin as bio-fertilizers in soil for increasing quantitative yield of Cassia angustifolia Vahl is recommended. پرونده مقاله

Background & aim: In sustainable agriculture, organic fertilizers are considered as important alternatives for chemical ones and are of great importance in organic producing of medicinal plants. This study was conducted to study the effects of organic fertilizers on Cassia angustifolia Vahl in dry and subtropical climate. Experimental: This study was carried out in Jiroft region, Kerman (Iran), at 2009-2010 in a randomized complete block design with three replications and thirteen fertilizer treatments. Results & discussion: The results of analysis of variance showed that treatments had significant effects on plant height, leaf width, number of branches, fresh weight of leaves, dry weight of leaves, fresh weight of shoot and dry weight of shoot (ppIndustrial and practical recommendations: In environmental conditions of the studied region, the integrated application of organic fertilizers containing nitrogen can improve quantitative yield of Cassia angustifolia Vahl. Therefore application of organic fertilizers can improve sustainable agriculture and organic production of medicinal plants in addition to decrease of chemical fertilizers application. پرونده مقاله