Study of Behavior of Devil Tanoak Tree ( Lithocarpus lepidocarus (Hayata) Hayata ) Shoot, Flower and Fruit Growth and Development
Date Issued
2013
Date
2013
Author(s)
Yu, Ting-Feng
Abstract
This article is divided into three sections: the shoot development , fruit ecology and development, and preliminary breeding of the devil tanoak (Lithocarpus lepidocrpus (Hayata) Hayata).
The first section is the development of the devil tanoak shoot. Devil tanoak of high altitude observation point is distributed about an altitude of 1500 meters and located at road sides of Lixing industrial road in Nantou County, with the total count of 15 observation trees. Devail tanoak of low altitude observation point is growing at about an altitude of 70 meters in Wufeng, Taichung, and total observation trees are five 7-9 year old trees. The sprouting period of the devil tanoak is usually in March to April. After the shoots are mature, inflorescence and anthesis form a number of top buds appears in August to September. Therefore, the devil tanoak of high altitude grows vegetative shoots and inflorescence one time in a year. The devil tanoak of low altitude is sprouting in March and July. Each shoots is almost inflorescence after mature. May and October are more obvious flowering and the fruit also mature at December to next year’s January and next year''s September.
The second section is the fruit ecology and development of devil tanoak. The devil tanoak of high altitude usually completely finishes anthesis in October. And pistillate flower will be little fruit stage to pass winter and into the period of fruit stagnation. Until next year''s new shoots inflorescence, the fruit will significantly grow. The devil tanoak of low altitude has two anthesis period. Spring fruit is the fruit from the shoot first sprouted in March and finished anthesis, and the curve of growth from fruit diameter, height, weight are fitted S curve. The fruit will be mature in December to next year’s January and natural drop from shoots. Autumn fruit is the fruit from the second sprouted in July. The curve of growth from fruit diameter, height, weight is fitted double S curve. Autumn fruit should start growing until next year''s Spring flower anthesis, and the fruit will be began to be mature in October. Therefore, the fruit from Spring or Autumn flower grow in significant difference.
The third section is the survey of calibration tanoak fruits and seed traits and preliminary breeding. The experiment method is picking up 30 to 40 fruits per plant, and removing the bad fruit, for example, bitten by pests, and then randomly selected 20 fruits per plant. Record the fruit and seed traits. Due to the cupule of natural drop fruit integrity are greatly diverse, so we removed the cupule of fruit and measured the content which only contains shell''s nut weight, nut height, nut diameter, and the edible seed weight without shell. After analysis, we found seed weight is significantly correlated with nut weight, nut height, and nut diameter. And we will found nut weight is the most important factor. Also, high edible rate
is an important factor that we need. Therefore, we can also perform preliminary breeding based on the tree''s trait of nutweigt:seedweight''s ratio. Among the selection of the current investigated plants, LC201 and LC197 both shows high rate and high edible weight, and thus could be the best strains.
Subjects
殼斗科
生長週期
堅果
Type
thesis
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