ديناميكية التغير في التركيب الكيميائي لبذور الفول العادي تحت تاثير التغذية البوتاسية و موعد الحصاد

The research was carried out during 2005 – 2006 to study the effect of 5 rates from potassium nutrition that, 0, 20, 40, 60, 80 Kg K2O / ha-1 3 with three dates of harvesting at 50 %, 75 %, 100 %, focusing on the interaction among these factors on dynamics of changing chemical composition of the seeds of faba bean. Results revealed the following: • Increased rates of potassium nutrition caused significant increase in the percentage of moisture, protein, oil, kernels, N and K in seeds compared with the control; but there were not significantly increases in fiber percentage and P. • The date of harvesting at maturity percentage 100 % led to a significant increase just in the percentage of protein and nitrogen. On the other hand, the percentage of oil, kernels, fiber, and P decreased. • The interaction among experiment factors significantly increases moisture, protein, kernels, and N. But there was not significant effect in the percentage of oil, fiber, and P.