Study on some natural regeneration characteristics of forest stands containing Fernandoa brillettii Dop. Steenis distributed in Yen Lac commune, Yen Trach, Thai Nguyen province

THAI NGUYEN UNIVERSITY

UNIVERSITY OF AGRICULTURE AND FORESTRY

-----------------------------

DAM TUAN ANH

STUDY OF SOME CHARACTERISTICS OF NATURAL REGENERATION

FOREST HAS THE SPECIES OF DINH MAT ( Fernandoa brillettii (Dop.) Steenis) DISTRIBUTED IN YEN LAC AND YEN TRACH COMMUNES, PHU LUONG DISTRICT,

THAI NGUYEN PROVINCE

UNIVERSITY GRADUATE LAW COURSE

Training system: Regular Major: ST&BTĐDSH Faculty: Forestry

Course: 2015 - 2019

Thai Nguyen, 2019

THAI NGUYEN UNIVERSITY

UNIVERSITY OF AGRICULTURE AND FORESTRY

-----------------------------

DAM TUAN ANH

STUDY OF SOME CHARACTERISTICS OF NATURAL REGENERATION

FOREST HAS THE SPECIES OF DINH MAT ( Fernandoa brillettii (Dop.) Steenis) DISTRIBUTED IN YEN LAC AND YEN TRACH COMMUNES, PHU LUONG DISTRICT,

THAI NGUYEN PROVINCE

UNIVERSITY GRADUATE LAW COURSE

Training system: Full-time

Major: ST&BTĐDSH

Class: K47 - ST&BTDDSH

Faculty: Forestry

Course: 2015 - 2019

Instructor: Dr. VU VAN THONG

Thai Nguyen, 2019

COMMITMENT

I hereby certify that the data and research results presented in the thesis are my actual results, the parts using reference materials in the thesis have been clearly stated in the reference section. The data and research results presented in the thesis are completely honest monitoring process, if there are any errors, I will take full responsibility and accept all forms of discipline proposed by the faculty and school.

Thai Nguyen, date.....month.....year 2019

CONFIRMATION OF THE INSTRUCTOR THE WRITER GUARANTEE

Dam Tuan Anh CONFIRMATION OF THE TEACHER GRADING THE ANTI-REFLECTION

Teacher marks student's comments and confirms them

Corrected the error after the Board reviewed the request!

(Signature, full name)

ACKNOWLEDGEMENTS

I would like to express my sincere thanks and deep gratitude to the teachers of Thai Nguyen University of Agriculture and Forestry, especially the teachers in the Faculty of Forestry who created conditions for me to do an internship so that I had more time for my graduation thesis. And I would like to sincerely thank the forest rangers, the People's Committee of Yen Lac, Yen Trach, Yen Do communes, Phu Luong district for creating all conditions to help me during my study and data collection in the locality. To complete this graduation thesis, I would like to express my deep gratitude to Dr. Vu Van Thong for his dedicated guidance throughout the process of writing the graduation report.

I sincerely thank the teachers inside and outside the school, friends, colleagues, teachers in the Faculty of Forestry - University of Agriculture and Forestry who helped and supported me in carrying out the procedures in the process of completing the thesis.

During the internship, as well as in the process of writing the internship report, it is inevitable that there will be mistakes. I hope that the teachers will forgive me. At the same time, due to the limited theoretical level and practical experience, the report cannot avoid shortcomings. I hope to receive comments from teachers so that my graduation thesis can be more complete and perfect.

Once again, thank you very much.

Thai Nguyen, date…..month…..year2019

Student

Dam Tuan Anh

LIST OF TABLES

Table 3.1. Criteria for evaluating soil sample analysis 25

Table 4.1. Results of measuring the average diameter of the trunk of Cinnamon 27

Table 4.2. Results of measuring the average size of the leaves of Clove 28

Table 4.3. Results of measuring the length and diameter of the fruit of Cinnamon 29

Table 4.4. Results of measuring the average seed weight of the 31 Clove fruit

Table 4.5. Wood layer composition of Yen Lac and Yen Trach forests 32

Table 4.6. Summary of canopy cover of OTCs with distributed density of 34

Table 4.7. Composition of regenerated trees in the forest state with the species of C. cerevisiae distributed in Yen Lac, Yen Trach 35

Table 4.8. Origin of regeneration of the species Dinh 36

Table 4.9. Regeneration quality around the mother root of the species Cinnamon 37

Table 4.10. Regeneration quality of Cinnamon species in OTC 38

Table 4.11.(1): Regeneration density of Cinnamon species at OTC 39

Table 4.11.(2): Regeneration density of Cinnamon species around the mother tree base 40

Table 4.12. Table of prospective regeneration trees of the species Cinnamon 41

Table 4.13. Quality and origin of regenerated tree species in Yen Lac and Yen Trach forests 42

Table 4.14. Distribution of regenerated tree species according to forest height class in Yen Lac, Yen Trach 43

Table 4.15. Summary table of shrub cover where the species Cinnamon is distributed 44

Table 4.16. Summary table of cover of climbing plants and fresh grass where the species of Cinnamomum species is distributed 45

Table 4.17. Results of soil profile where the species Dinh rot is distributed 46

Table 4.18. Results of soil analysis in areas where Dinh rot trees are distributed 47

LIST OF FIGURES

Figure 3.1. OTC layout and secondary cell secondary cell data collection plate cell arranged in OTC 20

Figure 4.1. Stem of Cinnamon 26

Figure 4.2. Compound leaves of the Polygonum multiflorum 28

Figure 4.3. Leaflets of the plant Clove 28

Figure 4.4. Flowers of the Clove tree 29

Figure 4.5. Fruit of the Clove tree 30

Figure 4.6. Seeds of the Clove tree 30

Figure 4.7. N/H correlation chart 38

Figure 4.8. Density chart of regenerated Cinnamon trees N/Ha 40

Figure 4.9. Prospective regeneration tree diagram 42

Figure 4.10. Tree species distribution chart, ratio of regenerated trees according to height class of Yen Lac forest, Yen Trach 44

LIST OF ABBREVIATIONS AND PHRASES

CTTT

: General composition formula
D 1.3	: Diameter 1.3m
D t	: Canopy diameter
H dc	: Height below branch
H vn	: Soaring height
ODb	: Table cell
OTC	: Standard cell
STT	: Numerical order
TB	: Medium
People's Committee	: People's Committee
TS	: PhD