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Response of Bread wheat to potassium nutrition: some growth, productivity and efficiency parameters

تجاوب القمح الطري (Bread wheat) مع التغذية البوتاسية: بعض معايير النمو، الإنتاجية و كفاءتها

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 Publication date 2018
  fields Soil And Water
and research's language is العربية
 Created by Shamra Editor




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A pot experiment was conducted in a green house at Tishreen University in which bread wheat (cv. Sham 6) was grown at different levels of potassium nutrition (K0=0, K1=25, K2=50, K3=75, K4=100, K5=150) mg k/kg soil. The increase in potassium fertilization rates led to a significant increase in the number of total tillers and fertile tillers on the expense of non-fertile tillers. This was accompanied with no significant increase in number of main stems spikes grains, while the tillers spikes of the first level of potassium application (K1) was higher significantly compared to control treatment (K0). The same treatment (K1) gave the best weight of grain on the main stems spikes and tillers. The productivity of grain yield increased (but non-significantly) with increasing the level of potassium fertilization. The highest yield value was obtained in K5 treatment which was 13933 kg /ha. This productivity constitutes a rate of increase 18% compared to the control treatment (K0). The calculation of Agronomic Efficiency (AE) showed a high value of (about 13 kg seeds/kg of K fertilizer added) in the K1 treatment, and thereafter, AE gradually decreased with potassium fertilization to reach about 6 kg grain/kg K fertilizer for K4 and K5 treatments (100 and 150 mg K/kg).


Artificial intelligence review:
Research summary
أجريت دراسة في جامعة تشرين خلال عامي 2016-2017 لدراسة تأثير التسميد البوتاسي على نمو وإنتاجية القمح الطري (صنف شام 6). تم استخدام ستة مستويات من البوتاسيوم (0، 25، 50، 75، 100، 150 مغ K/كغ تربة). أظهرت النتائج أن زيادة معدلات التسميد البوتاسي أدت إلى زيادة معنوية في عدد الإشطاءات الكلية والإشطاءات المنتجة، بينما لم يكن هناك تأثير كبير على عدد الحبوب في سنابل السوق الرئيسة. كانت أفضل النتائج من حيث وزن الحبوب وعددها في سنابل السوق الرئيسة والإشطاءات عند المستوى الأول من التسميد (K1=25 مغ K/كغ تربة). ازدادت الإنتاجية من الحبوب بشكل ظاهري مع زيادة التسميد، حيث سجلت معاملة التسميد بـ 150 مغ K/كغ تربة أعلى إنتاجية وصلت إلى 13933 كغ/هكتار، ما يعادل زيادة بنسبة 18% مقارنة بمعاملة الشاهد. كما أظهرت حسابات الكفاءة الزراعية أن أعلى قيمة كانت عند المستوى الأول من التسميد (K1)، ومن ثم انخفضت تدريجياً مع زيادة معدلات التسميد البوتاسي.
Critical review
دراسة نقدية: الدراسة قدمت نتائج مهمة حول تأثير التسميد البوتاسي على نمو وإنتاجية القمح الطري، إلا أنها اعتمدت على تجربة أصص في بيت بلاستيكي، مما قد يحد من تعميم النتائج على الحقول المفتوحة. كما أن الدراسة لم تتناول تأثير التسميد البوتاسي على جودة الحبوب من حيث المحتوى الغذائي. كان من الأفضل تضمين تحليل اقتصادي أكثر تفصيلاً لتكلفة التسميد مقابل زيادة الإنتاجية، بالإضافة إلى دراسة تأثير التسميد البوتاسي على مقاومة النبات للإجهادات البيئية مثل الجفاف. كما أن الدراسة لم تتناول تأثير التسميد البوتاسي على التربة على المدى الطويل، مما قد يكون له تأثيرات بيئية هامة.
Questions related to the research
  1. ما هو تأثير التسميد البوتاسي على عدد الإشطاءات الكلية في نبات القمح الطري؟

    أدى التسميد البوتاسي إلى زيادة معنوية في عدد الإشطاءات الكلية، حيث ازداد عدد الإشطاءات مع زيادة مستوى التسميد البوتاسي.

  2. ما هو المستوى الأمثل من التسميد البوتاسي لتحقيق أفضل إنتاجية من الحبوب؟

    المستوى الأمثل من التسميد البوتاسي لتحقيق أفضل إنتاجية من الحبوب كان عند 150 مغ K/كغ تربة، حيث سجلت هذه المعاملة أعلى إنتاجية وصلت إلى 13933 كغ/هكتار.

  3. كيف أثر التسميد البوتاسي على وزن الحبوب في سنابل السوق الرئيسة والإشطاءات؟

    أدى التسميد البوتاسي إلى زيادة وزن الحبوب في سنابل السوق الرئيسة والإشطاءات، وكانت أفضل النتائج عند المستوى الأول من التسميد (K1=25 مغ K/كغ تربة).

  4. ما هي الكفاءة الزراعية للتسميد البوتاسي عند المستوى الأول من التسميد؟

    كانت الكفاءة الزراعية للتسميد البوتاسي عند المستوى الأول من التسميد (K1=25 مغ K/كغ تربة) حوالي 13 كغ حبوب/كغ سماد بوتاسي، وهي أعلى قيمة مسجلة في الدراسة.


References used
ABD-EL HAMID.A.H; AWAD A. M; EL-SHEBENY. G. M. Effect of Potassium on the Drought Resistance in Crop Production Under the Egyptian Conditions. Plant Physiol, 1995, 140-151
ABROSH. AH; ZIREZADE. M; NURBANI. H . Evaluation of effect of drought stress and potassium levels on yield and components of wheat. National Conference on Water Crisis in Agriculture and Natural Resources. 2009, 7
DEMMIG, B; H. GIMMLER. Properties of the isolated intact chloroplast at cytoplasmic K+ concentrations. I. Light induced cation uptake into intact chloroplasts is driven by an electrical potential difference. Plant Physiol, 1983, 169-174
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