Results of selecting plus tree Cinnamomum cassia in Yen Bai and Lao Cai provinces
Keywords:
Cinnamomum cassia, plus trees selection, , Lao Cai and Yen Bai provicesAbstract
Cinnamomum cassia is a mainly forest plant in some mountainous
provinces of Vietnam. As an important medicinal plant for both
traditional and modern medicines, C. cassia 's main products come from
bark and essential oils. Therefore, plus tree selection of C. cassia is
necessary to focus on growth trait, high bark yield and oil content. Lao
Cai and Yen Bai provinces have the largest cinnamon growing area in
Vietnam. In C. cassia pure plantations in Tran Yen district (Yen Bai
provice), Bac Ha and Bao Yen (Lao Cai province), 50 plus trees with fast
growing, high bark weight and content of essential oil in bark , transaldehyt cinamic rate of oil more than 80% and couramin rate less than
4‰ were selected. In which, dry bark weight of 15 plus trees at the age of
30 years in Tran Yen district (Yen Bai province) ranged from 24.7 - 42.0 kg/tree and higher from 57.1 - 157.4% than an average value of the
population; essential oil content reached up 6.7 - 8.3% as well as
exceeded from 10.3 - 38.8% in compasion of the average of population.
In Bac Ha (Lao Cai province), 17 plus trees at 34 year old were selected
with the dry bark weight of 40.0 - 68.0 kg/tree, higher than the average of
population from 55.8 - 125.3%; essential oil content from 7.0 - 8.1%,
higher than the average population of 10.1 - 24.7%. In Bao Yen (Lao Cai
provice), 18 plus trees in 18 - year-old were selected with the dry bark
weight of 10.3 - 13.6 kg/tree, higher than the average population from
28.4 - 79.8%; essential oil content reaches from 6. 4 - 7.6%, higher than
the average population from 13.4 - 24.4%. These plus trees have been
recognized by the Department of Agriculture and Rural Development of
Yen Bai and Lao Cai provinces, and suggested local authorities to have
plans to manage those trees for scientific research as well as production
from now.
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