异色芋生物学特性观察

本文对观赏植物异色芋（ＣｏｌｏｃａｓｉａｈｅｔｅｒｏｃｈｒｏｍａＨ．ＬｉｅｔＺ．Ｘ．Ｗｅｉ）在昆明栽培环境下的生物学特性进行总结，为商品化栽培异色芋提供了理论依据，为其分类也提供了一定的有益补充。结果表明：一年生植株不开花，根茎也不产生分枝；二年生植株开花率为７３．６％，根茎平均分枝３．６条。异色芋３月上旬开始萌动，７月中旬抽花梗，８月上旬开花，１１月份地上部分枯萎，因此在昆明异色芋生育期约２６０ｄ。

THE OBSERVATION ON BIOLOGICAL CHARACTERISTICS OF COLOCASIA HETEROCHROMA

This paper summarized the biological characteristics of Colocasia heterochroma under cultivated condition in Kunming botanical garden. It provided a scientific basis for the commercial cultivation of this species. Some additional materials for classification were found as well. The results showed that: The first-year- old plants do not bloom, rhizomes do not branch either. During the second year, the rate of flowering is 73.6% on an average. There is not obvious defference on shape of leaf between first year and second year. In Kunming, the plants begin to sprout in the first ten days of march, bloom in the first ten days of Augest and leaves wither in November. The active growth period lasts approximately 260 days in a year.