MINISTRY OF EDUCATION AND TRAINING
THAI NGUYEN UNIVERSITY
NGA THI TO DANG
STUDYING ON SOME TECHNIQUES
TO DEVELOP DAISY FLOWER PRODUCTION
IN THAI NGUYEN CITY
Major: AGRONOMY
Code: 62 62 01 01
DISSERTATION FOR DOCTOR OF PHYLOSOPHY
IN AGRICULTURE
THAI NGUYEN - 2011
RELATED PUBLICATIONS
1. Nga To Thi Dang, Van Thanh Dao, (2009), “Study on effects
of GA3 and Yogen No. 2 to yield and quality of Vang Thuoc
Duoc daisy flowers (Chrysanthemum sp.) in Thai Nguyen”,
Journal of Science and Technology, 13(62), Thai Nguyen
University Press, pp: 87 - 90.
2. Nga To Thi Dang, Van Thanh Dao, Linh Xuan Nguyen
(2010), “Study on effect of lighting time to Vang Thuoc Duoc
daisy flowers (Chrysanthemum sp.) in Thai Nguyen”, Journal
of Science and Technology, 14(76), Thai Nguyen University
Press , pp: 41- 45.
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INTRODUCTION
1. BACKGROUND
Daisy flowers were introduced to Vietnam from the XV century and
some small areas for daisy production have been formed to provide flowers
for people since XIX century. This flower is used for festivals, ritual
purposes or as one kind of medicine. Now daisy flowers are planted
everywhere from rural to urban, from upland to lowland areas in
Vietnam. Some intensely planting areas are Hanoi (450 ha), Ho Chi Minh
(370 ha), Da Lat (160 ha), Hai Phong (110 ha).
Thai Nguyen City is located in the Northwest of Hanoi (80 km far
from Hanoi), with a total area of 17,707.52 ha. The City is located nearby
National Highway 3, linking mountainous regions with lowlands. This
played an important role in social - economic development of Thai Nguyen
which is also a center for exchanging culture between Thai Nguyen and
Northern region. In addition, Thai Nguyen has a convenient transport
system and has many universities and colleges such as University of
Agriculture and Forestry, University of Education, University of Medicine,
University of Economics and Business Administration, College of
Education... Therefore, Thai Nguyen is a large consuming market of flowers
and the flower production in Thai Nguyen has a high economic efficiency.
However, the daisy varieties are still limited, the productivity and quality of
daisy flowers are low as well. To contribute to improving the productivity
and quality of daisy flowers in Thai Nguyen, we carried out the
research: "Studying on some techniques to develop daisy flower
production in Thai Nguyen City”.
2. RESEARCH OBJECTIVES AND REQUIREMENTS
- Selecting some daisy flower varieties that have high yield, good
resistance and are suitable with the ecological conditions for developing
flower production in Thai Nguyen and surrounding areas.
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- Identifying some appropriate techniques to develop daisy flowers in
Thai Nguyen.
3. SCIENTIFIC AND PRACTICAL SIGNIFICANCE
3.1. Scientific significance
- The results of the research will provide scientific data on some daisy
flower varieties that are grown in Vietnam, especially in the ecological
conditions of Thai Nguyen. These are the results from studying the growth
and development of daisy flowers in two main seasons (Autumn-Winter
and Winter-Spring); initially identifying the daisy flower variety with high
yield - good flower quality and high economic efficiency; determining a
number of appropriate technical methods to improve the productivity and
quality of daisy flowers.
- The research results are the references of daisy flowers in Vietnam.
3.2. Practical significance
Determining the advantaged and disadvantaged factors to daisy
flower production and then recommending some methods to develop
daisy flowers in Thai Nguyen City. The research results on technical
methods will contribute to complete the guideline of daisy flower
production in Autumn - Winter and Winter - Spring seasons in Thai
Nguyen.
4. RESEARCH SCOPE
- Studying 30 imported and local daisy flower varieties to select the
variety/varieties that have high yield and quality.
- Research location: Thai Nguyen City.
- Research periods: From 2003 to 2008.
5. THE NEW FINDINGS OF THE THESIS
Based on the survey results of assessing the advantages and
difficulties affecting to the daisy flower production in Thai Nguyen, the
research results on varieties and farming techniques have confirmed the
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possible development of daisy flowers in Thai Nguyen. Determining the
growth, development and yield of some imported daisy flowers in Autumn
- Winter and Winter - Spring seasons in Thai Nguyen and finding out 7
suitable varieties to Thai Nguyen condition (C5, C13, C19, CN20, Vang
Thuoc Duoc, Do Bac Moi, Trang Dong Tien).
Some technical methods and determining the appropriate planting
time for the new daisy flower variety (Vang Thuoc Duoc) have been
studied. To have Vang Thuoc Duoc variety bloomed on 20 November
occasion in Thai Nguyen, the planting date should be on 10 August and 20
August. Planting Vang Thuoc Duoc daisy flower on 22 November get it
bloomed on New Year festival (The growth period is 88.3 days). Spraying
a mixture of GA3 and foliar fertilizers (Yogen No. 2) increased flower
height and number of first branches, increased pest resistance of Vang
Thuoc Duoc in Winter-Spring season. The treatment of lighting additional
4 hours (from 22:00 to 2:00) gave good flower quality and high
efficiency; We successfully implemented the demonstration of planting
daisy flowers in Thai Nguyen City with Vang Thuoc Duoc and new
production techniques. In the Winter-Spring, the profit was 11.79 millions
VND per 360 m2 compared to 4.28 million VND in the control treatment.
6. STRUCTURE OF THE THESIS
The dissertation was fulfilled with 108 pages, including an
introduction and three chapters with 40 tables, 4 figures; 80 references
including 35 references in Vietnamese and 45 references in English.
Chapter 1
LITERATURE REVIEW
1.1. Daisy flower production and research status in the world
The daisy flower studies have been conducted by many scientists
around the world. Daisy flower varieties have been hybridized and grown
in different ecological zones with the following main research contents:
- Forming a source of genetic material for hybridizing, selecting the
daisy flowers varieties that have good quality.