تاثیر سطوح مختلف نیتروژن و زئولیت بر صفات مورفولوژیک و عملکرد بیولوژیک استویا در شرایط آب و هوای اهواز

With increasing population, human today for their health, than ever required to produce bulk raw material,
natural drugs that help save this important development and sustainable crop plants with medicinal value
which is not possible. The natural seweetness of Stevia (Stevia rebaudiana Bertoni) is a without caloric
source alternative to artificially produced sugar. The sweet substitutes of this plant use for patients that need
to control their blood sugar level. Extract of Stevia leaf may be up to 300 times sweeter than Saccharose.
This experiment was conducted in a split plot based on a randomized complete block arrangement with three
replications in the Research Field of Ramin Agricultural and Natural Resources University (khouzestan) in
the years 1391-1392. The main plot was four levels nitrogen fertilizer (50, 100, 150 and 200 kg/ha pure
nitrogen) and sub plot was different levels of zeolite (0, 3 and 6 ton/ha).
Results showed that the effect of zeolite and nitrogen on number of branches per plant, longest shoot height
and leaf area index were significant, and had no effect on stem diameter. The highest biological yield was
obtained with application of 150 kg nitrogen and 6 tons of zeolite per hectare.