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Ali Abdullah Alderfasi

BACKGROUND. Specific Leaf Area (SLA) is a growth parameter that relates leaf area to dry matter accu-mulation. The aim of this work was to analyse the SLA variation during the crop cycle of sugar beet (Beta vulgaris var. saccharifera L.) depending on sowing time and irrigation treatment. METHOD. In a 4-year experiment in a southern Ital-ian environment (Capitanata plain, Foggia), sugar beet was planted in spring (2 out of 4 years) or au-tumn and given different irrigation regimes: Optimal (100% real evapotranspiration, ETc) and Reduced (60% ETc). Growth analysis (green leaf area, weight, number and size, dry matter of roots, leaves and stems) was performed with a destructive method. RESULTS. The beet SLA variations are expressed main-ly in dry matter accumulation, lower in the spring (short-er crop cycle) than in the autumnal crop, with a higher number of green leaves in spring. Seasonal average val-ues of SLA were 16.7 and 15.1 m 2 kg -1 for spring and autumn sowing, respectively. ...

Water and light are two important resources for red beet (Beta vulgaris var. conditiva Alef.) survival, growth and yield. Changes in leaf traits can be regarded as indicators for detection of crop responses to environmental stress, and could be utilized to select genotypes suitable for stressed environments. The objectives of the current study were to explore the adaptive changes of morphological and physiological leaf traits of red beet to water and light stress, and identify traits as potential suitable selection indicators in breeding programs. Red beet was treated with RED (red/far red ratio (R/FR): 1.29; transmitted photosynthetically active radiation (PAR): 66.9%), GREEN (R/FR: 0.43; PAR: 25.8%) photo‐selective films, and with two water conditions i.e., 50% of water holding capacity (WHC) (W50) and 30% of WHC (W30). Plants subjected to GREEN had higher specific leaf area (SLA) (248.6 cm2 g−1) and leaf area ratio (LAR) (232.2 cm2 g−1) and lower soil‐plant analysis development (...

This study was conducted to determine the effect of different water levels on the sugar rate, sugar yield and root yield of sugar beet (Beta vulgaris L.) under Kahramanmaras climatic conditions in the production season 1999-2000. A line source sprinkler irrigation system was used with 6 irrigation levels; I1, I2, I3, I4, I5 and I6. The sugar beet row adjacent to the lateral was denoted the most water applied level (I1), and the most remote row from the lateral was denoted the least water applied level (I6). The plant rows between levels I1 and I6 were taken as the deficit irrigation levels in variably decreasing amounts. In the first (1999) and second (2000) years of the experiment, the total amount of irrigation water applied in a season was 1232 mm in 1999 and 1331 mm in 2000, while the amounts of water consumed (Et) were 1446 mm and 1491 mm lively respect. For level I1, sugar rates were 17.2% and 15.1%, sugar yields were 9870 kg ha-1 and 9420 kg ha-1, and root yields were 57 360 ...

Publications of Dr Ali Abdullah Alderfasi 1) Ghandorah, M.O, M.M El‐Rouby, F.A. Al‐saad and A.A. Alderfasi. 1988. Effect of shading densities on the agronomic and physiological characters of two sugar‐beet cultivars. J.Agron. & Crop Sci. 161:114‐122. (ISI Journal). 2) Ghandorah, M.O., F.A. Al‐saad, M.M. El‐Rouby, and A.A.Alderfasi. 1988. Effects of shading densities on root chemical composition of sugar beet. J.Agron. & Crop Sci. 161:217‐220. (ISI Journal). 3) Alderfasi, A.A. and J.A. Morgan. 1997. Canopy temperature, architecture and water relations in wheat. Res. Bull. No. 5(69):5‐43, Agric. Res.Center, King Saud University. 4) Alderfasi, A.A. and J.A. Morgan. 1998. Use of canopy temperature as an indicator for water use efficiency and and yield producivity in wheat. Saudi J. Bio.Sci. 5(1):57‐ 71. (ISI Journal). 5) Al Al‐Yahya, F.A., A.A. Alderfasi, A.S. Al‐Hazmi, A.A. Ibrahim and A.T. Abdul‐Razig. 1998. Eﬀect of cereal cyst nematode on growth and physiological aspects of wheat under ﬁeld condiions. Pak.J.Nematol. 16(1):55‐62 6) Ibrahim, A.A., A.S. AL‐Hazmi, F.A. AL‐Yahya and A.A. Alderfasi. 1999. Damage Potential and reproduction of Heterodera avenae on wheat and barley under Saudi field conditions. Nematology, 1(6):625‐630. 7) Alderfasi, Ali A., M.O. Ghandorah and Kh.A. Moustafa. (1999). Evaluaion of some wheat genotypes under drought stress in arid region of Saudi Arabia. Alex.J.Agric.Res. 44(3):209‐217. 8) Alderfasi, Ali Abdullah. (2000). Response of four genotypes of wheat to irrigation schedules. Saudi J. Bio.Sci. 7(2):171‐178. (ISI Journal). 9) Saadalla, M.M. and Ali A. Alderfasi. (2000). Infrared‐Thermal sensing as screening criterion for drought tolerance in wheat. Annals Agric.Sci., Ain Shams Univ., Cairo 10) Alderfasi, Ali A. and D. Nielsen. (2001). Use of crop water stress index for monitoring water status and scheduling irrigaion in wheat. Agricultural Water Management, 47(1): 71‐77. (ISI Journal). 11) Alderfasi, Ali Abdullah. (2001). Evaluation of certain traits associated with drought resistance in wheat under field conditions. Annals Agric.Sci., Ain Shams Univ., Cairo, 46(1):71‐83. 12) Alderfasi, Ali Abdullah and Khalid M. (2001). Evaluaion of diﬀerent stress techniques for selection wheat tolerance at post‐anthesis stage. J. Agric. Sci. Mansoura Univ., Egypt, 26(8):3663‐3672. 13) Alderfasi, Ali Abdullah and Yahya Ali Refay (2002) Evaluaion of three techniques for characterizing wheat plant water status. JKAU. Met. Env. & Arid Land Agric. Sci., 13: 43‐52. 14) Alghamdi, S.S., A.A. Alderfasi and Kh. A. Ali (2003). Performance of some soybean genotypes under sowing dates in Saudi Arabia. J. Agric. Sci. Mansoura Univ., 28(8): 4951‐ 4959. 15) Abdel‐Mawgood, Ahmed L. and Ali A. Alderfasi . Estimates of genetic variance among S2 progenies from four yellow maize populations. Alex. J. Agric. Res. Egypt (2006) 51(2): 27‐34. 16) 17) Alderfasi, A. A., Integrated use of potassium fertilizers and water schedules on growth and yield of two wheat genotypes under arid environment of Saudi Arabia. 2) Effect on yield and yield component characters. WJAS, Pakistan (2009). 5(2): 221-227. Alderfasi, A. A., Yield potential of two barely genotypes grown under water stress of arid ecosystem of Saudi Arabia. JAES, Pakistan (2009). 5(3): 348‐353.(ISI Journal). 18) Alderfasi, A. A., Agronomic and Economic Impacts of reuse secondary treated wastewater in irrigation under arid and semi‐arid regions. WJAS, Pakistan (2009). 5(3): 369‐374. 19) Alderfasi, A. A., Influence of water stress treatments on growth, seed yield and quality of some faba bean cultivars grown under arid environment in Saudi Arabia. Bull. NRC. Egypt (2009). 34(2): 157‐174. 20) Alderfasi, A. A., S. S. Alghamdi and A. A. Al‐Garawi. Growth and yield of two soybean genotypes under seed inoculation and limited water conditions in Saudi Arabia. Bull. NRC. Egypt (2009). 34(2): 143‐156. 21) Alderfasi, A. A and S.S. Alghamdi. Integrated water supply with nutrient requirements on growth, photosynthesis productivity, chemical status and seed yield of faba bean. AEJA, Pakistan (2010). 3(1): 08‐17. 22) Alderfasi, A. A., A. E. Moftah and A. M. Aljuaed. Prospective study in influences of using bio‐organic farming system on growth, nitrate, oxalate and ascorbic acid contents in spinach. WASJ, Pakistan(2010). 9(1):49‐54, (ISI Journal). 23) Alderfasi , A. A. and A. A. AL‐Owayed. Magnitude yield response and economic value of selected Wheat genotypes related to irrigation schedules under arid ecosystem of Saudi Arabia. In: Sustainable Management, Technologies and Policies III. Great Britain, (2010). Vol.134 pp. 51‐62. Wit Press, UK. 24) Alderfasi , A. A., M. M. Selim, A.E. Moftah and A. M. Aljuaid. Influences of Nitrogen Sources Combined with Nitrification Inhibitor on Growth, Nitrate, Oxalate and Ascorbic Acid Contents in Spinach. [Journal of Advanced Research( ISI Journal), under Review]. aderfasi@ksu.edu.sa and aderfasi@gmail.com Plant Producion Department, P.O.Box 2460 King Saud University, Riyadh 11451 Saudi Arabia

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