effect of biofertilizer and organic manure application on yield and morphological index of roselle (hibiscus sabdariffa l.)

to study the effects of biological and manure fertilizer on quantity and quality characteristics of roselle (hibiscus sabdariffa l.), an experiment was conducted as split plot based on a randomized complete block design with three replications at the agricultural research center of zabol university, iran during growing season of 2012-2013. treatments included three manure level; 0, 10 and 20 t.h-1 and eight levels of biofertilizer such as control, nitroxin, bio - sulfur, biological phosphorus, nitroxin+ bio - sulfur, nitroxin+ biological phosphorus, bio - sulfur+ biological phosphorus, nitroxin+ bio - sulfur+ biological phosphorus. different levels of manure and biofertilizer inoculation were considered as main plots and subplots, respectively. add manure to the soil and seeds of rossel inoculant treatment was performed with bio - fertilizers before planting. traits including plant high, stem diameter, number of branches, number of fruits per plant, biological yield and economic yield based on results, levels of manure and fertilizer treatments and their interactions on biological traits were significant. bio- fertilizers treatments caused significant differences on all meantioned traits. interaction between treatments showed that the maximum economic yield equal to 1290 kg.h-1 roselle consumption combined with 10 t.h-1 manure+ nitroxin. the results showed that combined use of manure and biological, rather than taking them separately in increasing economic yield and growth characteristics roselle can play an effective role.