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لماذا تُدهن سيقان الأشجار بدهان ابيض؟

30 سبتمبر 2013

خلال فترة الخمود الشتوي عند النباتات تتعرض الأشجار لعوامل مختلفة منها:

الرطوبة، وأشعة الشمس في الصباح، وانخفاض درجة الحرارة في الليل، وارتفاع درجة الحرارة داخل الشجرة.

تسبب هذه العوامل ضررا لأنسجة النبتة، وهذا الضرر يظهر في الصيف حيث تموت الانسجة المتضررة جدا، بينما تتمكن الأنسجة المتضررة بشكل طفيف من البقاء لمدة اطول.

ولحماية الشجرة من التلف تدهن بالشيد الأبيض لعزلها عن الرطوبة، وعكس اشعة الشمس في الصباح (اللون الأبيض يعكس الحرارة والأشعة)

البيئة النباتات معلومات علمية، معلومات ثقافية

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