外源硒肥对茶叶化学品质及硒含量的影响

目的]为合理施用硒肥、开发富硒茶提供科学依据。方法]通过盆栽试验,研究了不同硒浓度对茶叶化学品质及硒含量的影响。结果]土壤施Na_2SeO_3能有效提高春茶和夏茶的化学品质及硒含量,且随着Na_2SeO_3施用量的增加,茶叶品质的化学成分(咖啡碱除外)及硒含量均呈先增加后降低的趋势,且整体上均在0.125 mg/kg硒浓度时效果最佳。此外,施用硒肥对春茶品质及硒含量的作用优于夏茶。结论]合理施用硒肥对提高茶叶品质和增加茶树硒含量具有明显的促进作用。

Effects of Exogenous Selenium on Chemical Quality and Selenium Content of Tea

Objective] Providing scientific basis for the rational application of selenium fertilizer and the development of se-enriched tea.Method] A pot experiment was carried out to investigate the effects of different selenium fertilizer treatments on the chemical quality and selenium content of tea.Result] Application of Na2SeO3 could effectively improve the chemical quality and selenium content of spring and summer teas.With the increase of Na2SeO3 application,the chemical component (except caffeine)and selenium content firstly increased and then reduced.And they reached the peak at 0.125 mg/kg selenium content.In addition,applying selenium fertilizer on the quality of spring tea was superior to that of summer tea.Conclusion] Rational application of selenium fertilizer could promote the chemical quality of tea and significantly enhance the selenium content of tea.