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引言印度为了满足纸浆材和农村燃料需要曾经广泛栽植杂种桉(Eucalyptus hybrid)。在各种社会林业和农林规划中栽种杂种桉的目的在于提供薪材和造纸工业原料。一般情况下,轮伐期为7～8年,于11月至翌年3～4月采伐纸浆材和薪材。采伐时实行矮林作业使之萌芽生长至再次采伐,但在7～8年生左右其叶通常都被废弃而没有用它来提取精油,然而经检测证明杂种桉精油含有丰富的α-蒎烯和β-蒎烯(d-pinene and β-pinene),可用于合成香料的制造。有鉴于此,试图研究在适当的月份采收杂种桉叶,这样至少每年能在木材采
INTRODUCTION India has widely planted Eucalyptus hybrids to meet pulpwood and rural fuel needs. The purpose of planting hybrid eucalyptus in various social forestry and agroforestry programs is to provide fuelwood and paper industry raw materials. Under normal circumstances, the rotation period of 7 to 8 years, from November to March next year 3 ~ April logging pulp and fuelwood. The harvesting practice of the implementation of the pruning of the growth of the wood to the re-cutting, but about 7 to 8 years old leaves are usually abandoned without the use of it to extract the oil, however, proved that the hybrid eucalyptus oil is rich in α-pinene and β-pinene (d-pinene and β-pinene), can be used for the manufacture of synthetic spices. In view of this, trying to harvest in the appropriate month hybrid eucalyptus leaves, so that at least annually in the wood mining