استهدفت هذه الدراسة تقييم الحالة الإنتاجية لنبات الثمام النامي طبيعيًا بمراعي المنطقة الشرقية من
المملكة العربية السعودية، إذ تم اختيار 48 موقعًا تجريبيًا (مساحة كل موقع 25 م 2، أبعاده 1X25 مترًا)
أخذت بطريقة عشوائية في ثلاث مناطق ( الرياض، العقير، الدمام) تمثل البيئة المناسبة لنباتات
الثمام.أظهرت النتائج أن الأنواع النباتية المنتجة التي رافقت نبات الثمام كانت Eragrostis barrelieri,
Haloxylon salicornicum, Leptadenia pyrotechnica,Plantago ovata, Zygophyllum coccineum.
The present study aimed to evaluate the productinty status of panicum
turgidum (Thumam) under the environmental conditions of the eastern
province of Kingdom of Saudi Arabia. Forty eight experimental sites (each of
25 m2, i.e. 1*25 m) were randomly selected from three locations (Roads of
Riyadh, Ogair and Damam), which represent the micro-environment of
thumam. Obtained results showed that the dominated plant species associated
with thumam were Eragrostis barrelieri, Haloxylon salicornicum, Leptadenia
pyrotechnica, Plantago ovata and Zygophyllum coccineum. The forage
production of thumam was 57 kg dry matter/ha. However, the nutrient value of
it was relatively low due to the low protein content (4.2 %) and high crude fiber
(30.2 %). Moreover, neutral detergent fiber was 62.4 %, acid detergent fiber
was 65.4 % and lignin was 11.70 % which indicate low nutritional forage value,
compared with traditional forage crops, i.e. Rhodesgrass (Chloris gayana) and
Alfalfa ( Medicago sativa). Macronutrient contents (Na, K, Ca and Mg) were in
the range of sheep and camel requirements, while P was very low as well as
micronutrients (Zn, Cu and Mn).
المراجع المستخدمة
Al-Noaim, A.A., A.A. Elgazzar, T.G. Rumney, and Y.S. Alkoraiem. 1991. Study of chemical composition of range plants in the eastern province of Saudi Arabia. Arab Gulf J. Sci. Res. 9:77-92
Association of Official Analytical Chemists, A.O.A.C. (1984). Official methods of analysis, 14th ed. Association of Official Analytical Chemists, Arlington, U.S.A
Bokhari, U. G.; F. Alyaeesh and M. AlNoori (1990). Nutritional characheristics of important desert grasses in Saudi Arabia. Journal of Range Management, 43 (3) May : 202 – 204