Response of grain sorghum (Sorghum bicolor L. Moench) to potassium fertilizer rates and omitting one irrigation [electronic resource].

Includes references.

TWO FIELD trials were carried out at Ebshway, Fayoum Governorate, during 2002,2003 to study the effect of potassium fertilizer rates and omitting one irrigation at different growth stages on growth, yield and its components as well as chemical components of sorghum grains.The main findings could be summarized as follows: 1- Increasing K rates from 25 up to 75 kg K20 / fed significantly increased plant height, TDW, LA, LAI, LAR, SLA, NAR, CGR, RGR, yield and its components as well as protein, total carbohydrate percentage and yields but no significant increment was recorded in SL W, harvest index, or crude fiber and ash percentages. 2- The general means of plant height, TDW, LA, LAI, LAR, SLA, RGR, CGR, NAR and yield and its components as we]] as chemical components were significantly decreased when sorghum plants were exposed to neglect yd or 4th irrigations except SL W and harvest index. 3- The interaction effects between potassium fertilizer rates and omitting one irrigation on plant height, TDW, LA, LAI, LAR, SLA, NAR, CGR, RGR, yield and its components as well as protein and total carbohydrates percentage and yields significantly increased when sorghum plants were exposed to neglected 511 irrigation and fertilization at 75 kg K20 / fed.

Summary in Arabic.

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