Stevia (stevia rebaudiana bertoni)‎ responds to different levels of nitrogen and potassium fertilizers in loamy sand soil

الملخص EN

A study was conducted in Al-Seba Reserve / Basra Governorate to study the effect of nitrogen and potassium fertilization on growth of stevia plants during 2018-2019 agricultural season, in pots.

A sandy mixture of soil was used and two factors were studied: the first factor was urea fertilizer with five levels of nitrogen (N0 0, N1100, N2150, N3 200, and N4 250 kg / ha) and the second factor was potassium sulfate with three levels of potassium (K0 0, K1 75 and K3150 kg /h (.

The experiment was experimental factor using a complete randomized design (C.

R.

D) with three replications.

The results showed a significant effect of adding nitrogen and potassium fertilizers and there interaction on: plant height, number of branches, leaf area index, and the treatment N3K2 gave the highest yield reached (1.27 tons.

h-1), and N4K2 recorded a highest content of Rebaudioside A (53.26 ppm).

*Part of Ph.

D.

thesis of the first authorCorresponding author: E-mail(khawla_74@yahoo.

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