ارزیابی عملکرد، اجزای عملکرد و شاخص های رشد گلرنگ در سیستم های کشاورزی ارگانیک و متداول

Abstract

Application of organic fertilizers in a sustainable agriculture system improves yield sustainability of field crop production. The current research has been formed to investigate the effects of various levels of vermicompost (zero, 3, 6 and 9 ton ha-1) and foliar application of humic acid (0, 1000, 2000 and 3000 ppm) on spring safflower (Local variety belongs to Isfahan), with using a split plot experiment based on a randomized complete block design with three replications in Kerman during the 2012 and 2013 growing seasons. Vermicompost and humic acid treatments has been allocated to main plots and subplots, respectively. HA as a foliar treatment on leaf surface was applied twice in stem elongation and flowering times. In addition, a chemical treatment has been viewed as conventional agriculture. In the current experiment, growth indices, seed yield and yield components were evaluated. The results showed that the maximum LAI, TDW and CGR have been determined at 9 t ha-1 vermicompost and 3000 ppm humic acid. Likewise, the results indicated that vermicompost lead to increase significantly seed yield, flower yield, head number per plant and seed number per head whereas 1000 seed weight was not affected by vermicompost. Head number per plant, seed number per head and seed yield were affected by humic acid treatments and increased from 1000 to 3000 ppm, significantly. However, 1000 seed weight decreased with the increasing concentration of humic acid. It should be mentioned that, 9 t ha-1 vermicompost × 3000 ppm humic acid produced the highest seed yield (4268.17 kg ha-1) in two years.