Effects of biological and chemical fertilizers nitrogen on yield and yield components in Cumin ( Cuminum cyminum L.)

摘要

Considering the importance of medicinal plants growth and biological application of fertilizers with sustainableagricultural production in order to eliminate or reduce chemical input to achieve desirable and sustainablequality, an experimental research was conducted based on a randomized complete block design with two factorsof chemical nitrogen (46% urea nitrogen) at two levels (0, 25 and 50 kg/ha-1), biological nitrogen (combinationof Azotobacter spp. and Azospirillum spp.) at two levels inoculated and non-inoculated in 2010. The results ofanalysis of variance showed that the effects of biological nitrogen (combination of Azotobacter spp. andAzospirillum spp.) of chemical nitrogen (urea 46%) in different treatments on plant height, umbel number perplant, grain number per umbel and grain yield were significant at P≤0.01. However, there were no significantdifferences between treatments in about weight of 1000 grains and grain number per plant. The results showedthat the greatest plant highest (28.18 cm) and grain yield (75.600 g/m2) and were obtained by a treatment ofbiological nitrogen + chemical nitrogen (25 kg/ha-1). Results indicate that applying the combined biologicalnitrogen and chemical nitrogen fertilizer can be practical and helpful method to increase Cumin yield, yieldcomponents and reduce the environmental pollution.