استجابة نبات الكجرات Hibiscus sabdariffa L للتسميد النتروجيني والبوتاسي والتداخل بينهما في صفات النمو والحاصل والمادة الفعالة طبياً

Response of (Hibiscus sabdariffa L.) to Nitrogen and Potassium Fertilization and The Interaction Between Them on Growth Characteristics, Yield and

field experiment was carried out in one of the fields designated for the Department of Field Crops / College of Agriculture / University of Karbala in Ibn Al-Bitar Vocational High School / Al-Hussainiya area for the 2021 agricultural season in order to study the effect of adding levels of nitrogen and potassium fertilizers on growth characteristics, yield and active substance of the Gujarat plant. The experiment included two factors, the first is the use of levels Nitrogen urea CO (NH2)2, which is (0, 100, 200 and 300) kg N Ha-1, and the second factor is levels of potassium potassium sulfate (K2SO4) are (0, 50, 100 and (150 kg K Ha-1), use the randomized complete block design Blocks Design (RCBD) In ​​a factorial experiment with three sectors, each sector contained 16 treatments. The data was analyzed statistically and according to the least significant difference LSD using the Genstst program. The following results showed:
• The level of 300 kg N Ha-1was significantly superior in all characteristics of vegetative growth, yield and concentration of nitrogen and potassium, while the level of 200 kg N Ha-1was significantly superior in the content of goblet leaves from the active substances (vitamin c, Quercetin, Hibiscetin, Gossypetin, Protocatechuic acid, Sabdaretin Anthocyanin and citric acid 45.39, 8, 22.83, 1.3, 19.13, 50.51, 41.92, and 33.97) % respectively
• The level of 150 kg K Ha-1of was significantly superior in the characteristics of plant height, total chlorophyll, a and b, plant wet and dry weight, number of nuts, dry and wet weight of walnuts, total yield of walnuts, wet and dry weight of angiosperms, total yield of aniseed leaves, concentration of nitrogen and potassium, and content of angiosperms (citric acid and vitamin c, Quercetin, Hibiscetin, Gossypetin, and Sabdaretin) with increases of (50.81, 19.17, 14.04, 6.14, 1.5 and 36.18)%, respectively.
• The interaction between nitrogen and potassium showed significant superiority for treatment (300 kg N Ha-1and 150 kg K Ha-1) in the characteristics of chlorophyll a, b, total, dry and wet weight of walnuts, total yield of walnuts, total yield of aniseed leaves, potassium, Quercetin, Hibiscetin and Gossypetin, while the treatment – 200 kg N Ha-1 and 150 kg K Ha-1) were significant in citric acid, Protocatechuic acid, Sabdaretin, and vitamin c.
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