TAILIEUCHUNG - Summary of agricultural doctoral thesis: Studying the growth, development capacities and technical measures to increase yields, qualities of some exotic orchid cultivars (cattleya, dendrobium, oncidium) for Northern Vietnam

The purpose of this research subject is to study the growth, development of some exotic hybrid orchid genera of Cattleya, Dendrobium, Oncidium in order to select new promising hybrid orchid cultivars, consistent with the Northern Delta region and the nearby region with similar ecological conditions. | E Iffl MINISTRY OF EDUCATION MINISTRY OF AGRICULTURE AND TRAINING AND RURAL DEVELOPMENT VIETNAM ACADEMY OF AGRICULTURAL SCIENCES HOANG XUAN LAM STUDYING THE GROWTH DEVELOPMENT CAPACITIES AND TECHNICAL MEASURES TO INCREASE YIELDS QUALITIES OF SOME EXOTIC ORCHID CULTIVARS CATTLEYA DENDROBIUM ONCIDIUM FOR NORTHERN VIETNAM Branch of study Crop science Code 62 62 01 10 SUMMARY OF AGRICULTURAL DOCTORAL THESIS HANOI - 2014 ịl lị Project completed at VIETNAM ACADEMY OF AGRICULTURAL SCIENCES Scientific supervisors 1. Ass. Prof .Dr. Nguyen Thi Kim Ly 2. Prof. Dr. Nguyen Xuan Linh Critic 1 Critic 2 Critic 3 The thesis is defended at Council for Thesis Assessment at University Institutional level held at Vietnam Academy of Agricultural Sciences At hours day month year This thesis can be referred to at - Vietnam National Labrary - The Libray of Vietnam Academy of Agricultural Sciences Ì1 f 1 INTRODUCTION 1. Urgency of research topic Of all popularly planted types of flowers orchids are known as a flower not only beautiful fragrant multi - colorful but also are of high economic value. So far mankinds have learned on more than 750 orchid branches with 35000 wild orchids species and 75000 orchid cultivars as a result of selection and breeding 33 . In Vietnam there are about 1003 species of orchids available 33 . These are very abundant plant resources to serve the creatation and breeding of new varieties of orchids. However most of these orchids can only be exploited and cultivated in natural conditions technical measures have not yet been applied so their yields and qualities are not high that can not meet the requirements of consumers. Whereas the exotic orchids have their advantages as having good growth and healthy development high yields good quality of flowers big flowers beautiful colors various diversified durable and long -lasting flowers and that their flower blooming time can be controlled for the occasions of Holidays or Lunar New Year Celebration that has brought .

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