Abstract
The present study was carried out in the glasshouse of the Department of Biology, College of Science, Salahaddin University- Erbil, and laboratories of Research Center in Erbil Polytechnic University, from April 21st, 2019 to July 26th, 2020, to determine the eff ects of foliar application of nitrogen (N1:100, N2:200, and N3:300 kg. h-1) and magnesium (Mg1:0.0, Mg 2:30, and Mg3:60 kg. h-1) applied under two diff erent soil moisture contents (SM1:100% fi eld capacity (FC) and SM2: 60% FC) on some physiological properties and yield quality of rosemary plants (Rosmarinus offi cinalis L.). A factorial experiment was laid out according to a completely randomized design with four replications. Two cuttings were taken from the rosemary shoots (in March, and July, 2020). Results showed that SM2 decreased phenolic compounds in cut 1 (cut 1), dry matter percent in leaves in cut 2 and relative nitrogen yield in cut 1, cut 2 & cut 1+2. N3 increased dry matter in leaves shoots in cut2 signifi cantly, proline, phenolic compounds in leaves, stress tolerance index (STI), modifi ed stress tolerance index 1(MSTIK1), & modifi ed stress tolerance index 2 (MSTIK2). The interaction treatment SM2Mg2 increased the proline content in dry leaves. The proline content was increased by the triple interactions SM2N3Mg2 and SM2N3Mg3.
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