Changes in Glucose, Fructose and Sucrose Contents in Storage Roots of Asparagus During Vegetation Period

The objective of the field experiment conducted during 2000-2002 was to determine changes in glucose, fructose and sucrose contents in storage roots of asparagus (Asparagus officinalis L.) cv. ‘Thielim’ during vegetation period. The aim of the study was also to estimate the correlation between yield and the content of carbohydrates. Sum of glucose, fructose and sucrose contents (GFS) and sucrose contents in storage roots of asparagus decreased at the beginning and increased at the end of harvest. Generally glucose and fructose for carbohydrate contents increased, while that of sucrose decreased. A possitive correlation was observed for sucrose and GFS between asparagus spears and storage roots (r=0.821 and r=0.641, respectively). A negative correlation between the yield of spears and glucose, sucrose and GFS contents in storage roots was found (r=0.595, r=0.624, r=0.794, respectively). Positive correlations were found between total yield during harvest and year of cropping, average GFS content in storage roots during harvest, sum of radiation during harvest, while negative correlation between total yield and sum of average daily air temperature during harvest was found.