平欧杂种榛果实发育过程中Vc含量的变化研究

以7年生平欧杂种榛‘82—11’、‘84—237’及‘84-402’为研究对象，在果实成熟期每隔3。6天，采用2，6-二氯靛酚滴定法测定Vc含量，分析其果实发育过程中Vc含量变化。结果表明：幼果迅速发育期，Vc相对含量和绝对含量大幅度下降，平均降幅为90．67％和64．4J4％；从果壳硬化期到果实成熟，Vc相对含量和绝对含量变化不大，降幅较小，其平均下降幅度为39．72％和30．47％。

Study on Variation of Vitamin C Contents of Crossbred Hazelnut during Fruit Development

Three 7-year-old crossbred hazelnuts ＇ 82-11 ＇ , ＇ 84-237＇ and ＇ 84-402＇ were selected as the tested samples. During fruit maturation period, Vc contents were detected every 3 - 6 clays by using 2, 6-two chloride in- dophenol titration method, the variation of Vc content of hazelnut during fruit development was studied. The results showed that during young fruit rapid development, there was a dramatic reduction both in Vc relative content and in absolute content. During hazelnut shell hardening period to fruit maturation period, Ve relative content and ab- solute content changed little, the average decreasing ranges were 39.72 % and 30.47 % respectively, and the re- duction rate was small.