Effect of thermal requirements on chemical content of sugar beet and it’s reflecting on yield in Upper Egypt

Abstract

A field experiment was carried out to calculate the effect of thermal requirements and its relation to the yield and chemical content of sugar beet during two growing seasons in Upper Egypt. The temperature effects on sodium, potassium, and alpha - amino nitrogen contents. There was a high correlation between growing degree days (GDD) of three harvesting dates and three sugar beet varieties. The results indicated that increasing harvesting date increased roots and sugar yields.