氮磷钾对甜菜硝酸还原酶与亚硝酸还原酶的影响

以当前甜菜生产主栽品种KWS0143为试材,采用"3414"试验设计,探讨了氮磷钾肥对甜菜硝酸还原酶和亚硝酸还原酶活性的影响,及2种酶活性与甜菜产、质量的关系。结果表明,在甜菜生育期间,2种酶活性基本呈双峰曲线变化;随着施氮水平的升高,酶活性增强;磷肥与酶活性在生育中期呈显著或极显著正相关关系;硝酸还原酶活性在甜菜生育中前期、后期与产量、产糖量表现显著或极显著正相关关系,亚硝酸还原酶活性在甜菜生育中期与产量、产糖量正相关关系达到极显著水平。酶活性与含糖率则一直保持着负相关关系。

EFFECT OF NPK ON NR AND NIR ACTIVITY OF SUGAR BEET

The current main sugar beet KWS0143 was applied to investigate effect of NPK fertilizer on NR and NIR activity of sugar beet and discuss the relationship between enzyme activity and yield and quality of sugar beet design.Results showed that the enzyme’s activity presented the two-peak curve during the sugar beet growth and development period,The enzyme activity was enhanced with the raising the level of nitrogen.Significant positive or extremely significant positive was found between phosphorous fertilizer and enzyme activity during the middle of sugar beet growth and development.NR activity was significant positive or extremely significant positive correlated with yield and sugar yield at the beginning and end of sugar beet growth and development period.The relationship between NIR activity with yield and sugar yield were extremely significant positive in the middle of sugar beet growth and development period.Enzemes’activity and sugar content were negatively correlated in all the growth and development period.