【摘要】 <正> 中国沙棘(Hippophae rhamnoides L.subsp.sinensis Rousi)是鼠李沙棘的一个亚种。主要产于我国山西、陕西、甘肃、青海、四川、河北、辽宁8省和宁夏、内蒙两个自治区。中国沙棘是我国重要的资源植物。 从本世纪20年代初就开始了对沙棘的研究。随着沙棘新用途的发现和综合利用工业的发展,沙棘的化学成分研究也越来越受到重视,苏联学者在这方面进行了大量的工作。我国近几年来对沙棘的研究也相当活跃。本文重点报道几个地区的中国沙棘维生素C含量及其变化规律,为采摘期和合理开发利用提供参数,同时也为加速沙棘优良品种的人工选育提供依据。更多还原

【Abstract】 The paper reported the Vc content changing rules in Hippopkae rhamnoides fruits that were taken from the natural forest grown in different geographical production places. Statistical analysis shows that the Vc content is related to the different geographical locations and altitudes of the production place, which obviously affect the Vc content. Before physiological maturity the Vc content in H. rhamnoides fruits increases sharply with the development of the fruit, and decreases slowly after physiological maturity. In the low elevation area of Beijing, it reaches the peak value in the first ten days of July. In the daily changing process, the peak Vc content occurs during 0~3 o’clock, and the content descends to the lowest during 12-15 o’clock. The fruits on the upper part of the canopy have the highest Vc content, while those at the middle part take the second, and those at the lower part have the lowest content. The fruits on the illuminated aspect possess more Vc content than those on the shaded aspect.更多还原