Determination of annual variation of yield and main nutrients of green asparagus
The annual variation in yield and nutritional quality of green asparagus under the cultivation mode in southern China was evaluated to provide the selection basis for asparagus farmers.Fresh spears of six cultivars were harvested in different months,to determine the growth rate,yield and main nutritional components (soluble sugar,VC and total flavonoids) from their different parts.During the harvest season,the growth rate of JH152 was slightly faster than other cultivars,and its annual yield of 3220.80 g per plant,commodity rate (92.67％) and high-quality (52.73％) rate were significantly higher,but the total flavonoids and vitamin C (VC) contents in the upper segment of JH152 spears were low,which may be related to the shortest emergence time and the highest yield.Relatively,the annual yield of Grande was lower (2294.51 g per plant),but its fresh spears retained better commercial and nutri-tional quality with 542.9 mg·kg-1 total flavonoids and 596.8 mg·kg-1 VC .Total flavonoids,VC and soluble sugar in spears exhibited marked seasonal variation,and their contents in different parts were significantly diverse (P<0.05),and the effects of harvest seasons and management methods on the main nutrients of green asparagus were greater than that of variety and yield.The study further elucidates the regularity of nutritional quality of green aspara-gus,and also provides the basis for breeding of green asparagus with high quality and yield.
green asparagustotal flavonoidsvitamin Csoluble sugaryieldannual performance
万方数据
维普
