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EFFECTS OF SOWING DATE AND IRRIGATION INTERVAL ON GROWTH AND YIELD OF WHEAT (TRITICUM AESTIVUM L.) A

How to cite

Hussien Mohamed Haj ,Habiballa A. Mohamed ,Eltohami I. Eltayeb ,2007, EFFECTS OF SOWING DATE AND IRRIGATION INTERVAL ON GROWTH AND YIELD OF WHEAT (TRITICUM AESTIVUM L.) A,Journal of Science and Technology,8 (1) ,pp:0-0

Authors:
By Hussien Mohamed Haj ,Habiballa A. Mohamed ,Eltohami I. Eltayeb ,
Year:
2007
Keywords
Sowing date, lrrigalion interval, Crop factor, Thermal time
Abstract
Effects of sowing dates and irrigation regimes on growth and yield of wheat were investigated at New Halfa Scheme during the seasons 1988/89 and 1989/90. Climatic data were obtained from New Halfa meteorological substat-ation. Evapotranspiration (ET), crop factor (CF), tiller number and dry matter production were determined. Thermal time requirements for tillering, dry matter production and phenological growth stages were calculated. The results showed that late November sowing dates (November 20th and 28th) generally produced higher values for ET, CF, number of tillers, dry matter production, number of heads/m2, number of grains/head, 1000–seed weight and final grain yield than those of late sowings (December, 15th and 25th). However, no significant differences were noted regarding these parameters due to irrigation regimes. The results also show that wheat required about 1546 degree–days (oCd) from planting to maturity. It is concluded that late December sowings may subject wheat to heat stress, and hence poor grain yields
ÇáăáÎŐ

تمت دراسة آثار تاريخ الزراعة وطول فترة الري علي نمو وإنتاج القمح في مشروع حلفا الجديدة الزراعي خلال موسمي 88 - 1989 و 89 - 1990. استخدمت معلومات المناخ من محطة الرصد بحلفا الجديدة ومنها أجريت حسابات البخرنتح (ET) ومعامل المحصول (CF) ومن التجربة أحصى عدد الخلف وإنتاج المادة الجافة. أوضحت النتائج أن الزراعة في 20 و 28 نوفمبر أدت إلى معدلات أعلي للبخرنتح، عامل المحصول، عدد الخلف والمادة الجافة، بالإضافة إلى مكونات المنتج مقارنة مع 15 و 25 ديسمبر. لم توجد اختلافات معنوية باختلاف فترة الري. أوضحت النتائج أن القمح يحتاج إلى حوالي 1546 درجة يومية (degree days) من الزراعة إلى النضج. وقد خلصت الدراسة إلى أن الزراعة المتأخرة في ديسمبر تعرض القمح للإجهاد الحراري وتقلل من إنتاجيته وأن تاريخ الزراعة المناسب هو نوفمبر.

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