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The effect of deficit irrigation in the growth of some apple seedlings rootstocks

تأثير الري الناقص في نمو غراس بعض الأصول البذرية للتفاح

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 Publication date 2014
  fields Groves
and research's language is العربية
 Created by Shamra Editor




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The present investigation was carried out at the Agricultural Scientific Research Center in Swieda to study the effect of deficit irrigation on the growth of four apple seedlings rootstocks genotypes and to estimate their ability to drought tolerance particularly in light of the lack of water sources and no rain. Two irrigation levels: 100% (control) and 75% of water requirements were applied. The shoot length, leaves number, leaves area, the distribution of the roots in soil, the depth of irrigation water in the soil and the consumption of water in each level were measured. Results showed that irrigation with 75% of field capacity on studied genotypes caused reduction of shoots length, decline of leaves number and area and the depth of root comparing with the control. There were significant differences between studied genotypes in terms of vigor where the genotypes C and S2 were superior than A and B.


Artificial intelligence review:
Research summary
نفذ البحث في مركز البحوث العلمية الزراعية في السويداء لدراسة تأثير الري الناقص على نمو غراس أربعة طرز من أصول التفاح البذرية لاختبار قدرتها على تحمل ظروف الجفاف. استخدم مستويان من الري: 100% من الاحتياج المائي (شاهد) و75% من الاحتياج المائي (معاملة ثانية). تم قياس طول الطرود، وعدد الأوراق، وطول وعرض الورقة، وتوزيع الجذور في التربة، والاستهلاك المائي عند كل مستوى ري. أظهرت النتائج أن الري بنسبة 75% من السعة الحقلية أدى إلى قصر طول الطرود وانخفاض عدد الأوراق ومساحتها في جميع الطرز المدروسة، وزاد تعمق الجذور مقارنة بمستوى الري 100% من السعة الحقلية. اختلفت الطرز المدروسة فيما بينها من حيث قوة النمو، إذ تفوق الطرازان C وS2 على الطرازين A وB. كما أظهرت النتائج أن الطراز S2 كان الأفضل في تشكيل الجذور تحت ظروف نقص ماء الري.
Critical review
دراسة نقدية: الدراسة تقدم معلومات قيمة حول تأثير الري الناقص على نمو غراس التفاح، ولكن هناك بعض النقاط التي يمكن تحسينها. أولاً، كان من الأفضل تضمين المزيد من الطرز البذرية لزيادة تنوع العينة وتحسين دقة النتائج. ثانياً، لم يتم التطرق إلى تأثير الري الناقص على جودة الثمار، وهو جانب مهم يجب أخذه في الاعتبار في الدراسات المستقبلية. ثالثاً، كان من الممكن استخدام تقنيات ري حديثة مثل الري بالتنقيط المحسن لتقليل الفاقد المائي وزيادة كفاءة الري. وأخيراً، كان من الأفضل تضمين تحليل اقتصادي لتكلفة وفوائد استخدام الري الناقص مقارنة بالري الكامل.
Questions related to the research
  1. ما هو الهدف الرئيسي من الدراسة؟

    الهدف الرئيسي من الدراسة هو دراسة تأثير الري الناقص على نمو غراس أصول التفاح البذرية واختبار قدرتها على تحمل ظروف الجفاف.

  2. ما هي مستويات الري المستخدمة في الدراسة؟

    استخدمت الدراسة مستويين من الري: 100% من الاحتياج المائي (شاهد) و75% من الاحتياج المائي (معاملة ثانية).

  3. ما هي النتائج الرئيسية التي توصلت إليها الدراسة؟

    أظهرت النتائج أن الري بنسبة 75% من السعة الحقلية أدى إلى قصر طول الطرود وانخفاض عدد الأوراق ومساحتها، وزاد تعمق الجذور مقارنة بمستوى الري 100% من السعة الحقلية. كما تفوق الطرازان C وS2 على الطرازين A وB من حيث قوة النمو.

  4. ما هي التوصيات التي قدمتها الدراسة؟

    أوصت الدراسة باستخدام الطراز S2 في المناطق التي تعاني من نقص المياه نظراً لقدرة هذا الطراز على تشكيل الجذور تحت ظروف نقص ماء الري، مما يجعله مناسباً للزراعة في ظروف الجفاف.


References used
Atkinson, D. 1983. The growth, activity and distribution of the fruit tree root system, Plant and Soil Journal. 71: 23-35
Atkinson, C. J., M. Policarpo, A. D. Webster and A. M. Kuden. 1999. Drought Tolerance of Apple Rootstocks: Production and Partitioning of Dry Matter, Plant and Soil Journal. 206( 2):223-235
Connell, O. and M. G. Goodwin. 2007. Responses of 'Pink Lady' apple to deficit irrigation and partial rootzone drying: physiology, growth, yield, and fruit quality, Australian Journal of Agricultural Research. 58:1068-1076
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