TAILIEUCHUNG - Assessing the suitability of bio climate conditions of Phu Tho province for the growth and distribution of tea

In this article, by analyzing bio-climatic characteristics of Phu Tho Province and comparing tea plant eco-biological requirements, the adaptability assessment of bioclimatic conditions of Phu Tho has been made. | JOURNAL OF SCIENCE OF HNUE Natural Sci. 2008 Vol. 53 N . 5 pp. 161-170 ASSESSING THE SUITABILITY OF BIO-CLIMATE CONDITIONS OF PHU THO PROVINCE FOR THE GROWTH AND DISTRIBUTION OF TEA Dang Thi Hue Hanoi National University of Education Abstract. In this article by analyzing bio-climatic characteristics of Phu Tho Province and comparing tea plant eco-biological requirements the adaptability assessment of bioclimatic conditions of Phu Tho has been made. The result of the assessment shows that Very suitable bio-climates IA1a IB1a IIA2a and IIB2a these areas are lower than 540 m belonging to Ha Hoa Thanh Son Phu Ninh Lam Thao Thanh Ba Tam Nong Thanh Thuy Song Thao Yen Lap west of Doan Hung districts and Phu Tho township Relatively suitable are IB1b IIIA3a bio-climates these areas are lower 600 m in Thanh Son district - western and southwestern parts of the province Less suitable are IC1b IVA4a bio-climates. It is very dry or mountainous - like Luoi Hai gt 900 m Mountains Ten Cam Cam Co gt 700 m in Thanh Ba district because of the cold temperature regime more than 5 cold months tea planting isn t appropriate to the territory. 1. Introduction Phu Tho is a province located in the centre of the Northern Mountainous Region of Vietnam. It is famous for Hung King s ancestral land and is a long- standing native land for tea. The province is situated between 21o 43 and 20o 55 North Latitudes 104o48 and 105o27 East Longitude. Its total natural area is 3 465 km2 . Topography is relatively diverse including low mountains hills and valleys the highest is Luoi Hai Mountain 1 058 m . The topography is characterized by low mountainous and hilly ranges that originated from large denuded peneplain surfaces and composed of degenerate minerals. Phu Tho is also a meeting-place of Red Da Lo and many other rivers in the Red River system. Phu Tho belongs to the Northern climate region has a monsoon tropical climate regime with cold winters. It is specified as a transition from plain to moun- .

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