Dao Shall 'gel' with Plants
13th. September, 1998.
By KAN YAW CHONG
FROM Vietnam comes a very interesting story about
People and Plants. A minority indigenous tribe who know
the forest best in that country are the 100,000 or so Dao
people who migrated from China several hundred years ago.
What fascinates young Vietnamese
scientist like Tin Van On, a Masters in pharmacy and
botany, is the amazing vigour and health of the Dao
people in general.
"When it comes to medicinal
plants in Vietnam, it's the Dao people who have been
living in and around forests for a long time," Tin
said.
"They had no hospitals, no
health care system and that means they had to look after
themselves but they are vibrant, very, very strong and
healthy people, observed Tin who had been working
over the last six years among about 2,000 Dao people in
connection with a project called Conservation of
Medicinal Plants in Bavi National Park, about 60km from
Hanoi.
Citing an example, Tin said :
"After having babies, Dao women can go back to the
field and work very, very hard, after only three
days!"
Such a short break is a stark
contrast to the lengthy and careful post natal
confinement practice (stay inside closed room, shun
washing hair or hands for weeks) observed by other women
in other region, including Sabah.
The Dao secret?
"A very special and effective
prescription in the form of a dense, glue-like gel
composed of extracts brewed from a group of some 150
different medicinal plants but mainly about 20 core
species," Tin pointed out.
"What they do is they drain
some of this extract and dip their body for about 30
minutes," he said
But one can see the extraction
process is tedious, complex and requires the use of an
incredibly large variety of plants.
"To make a very good
prescription, they use over 150 species of plants. So
each preparation needs 50kgs to one metric ton of
materials!" pointed out Tin.
A consequence is over harvesting of
key medicinal plants.
Said Tin: "Normally in Chinese
medicines, they just boil plants with water and drink the
brew. That's easy but in the Dao's case, they need to
kick the water out until the extracts become a very dense
glue-like gel," Tin pointed out.
"In that way, there's a need
to use a lot of medicinal plants from the Bavi Park.
Every day, Dao people go to the Park and harvest
medicinal plants illegally. That's a big problem but we
cannot stop them because they need something to live and
earn money and something for their children." Tin
said.
The solution to this problem is a
matter of Tin's research for his PhD.
"Planting these medicinal
plants is a research project I have done over the last
three years for my doctorate," said Tin, who was at
Kinabalu Park in June to attend the People and Plants
Southeast Asia's Certificate Training Course in
Applied Ethnobotany.
"To do that, we should study
very hard the ecological condition of each species. So we
went into the forests and made a lot of tran-sectoral
plots to research the ecological conditions of many
species," he said.
"So many people wanted to grow
medicinal plants in their gardens but it had proved very
difficult. Many plants died because many species need
shade, many need high humidity as found in natural
forests but people just pull out plants from the forest
and transfer that into their garden which is very open
and very dry and the plants die," he pointed out.
"This means we must know their
ecological condition and propagate them because many
important species are already over harvested to the
extent that we cannot find mature trees with flowers and
seeds any more. All the big trees have been chopped down,
leaving baby trees which are not old enough to
flower," he said.
"So, what we are trying now is
to grow them by stem cutting. This is the fastest
technique because you can get hundreds of them in one
morning. This is a very new technique not only for that
community but also for the whole of Vietnam," Tin
said.
"We have studied a lot of
techniques from developed countries like United Kingdom
and Australia where they have very good systems -
computer controlled systems where humidity and other
conditions are fed."
"But of course, we cannot
apply that system to the community, so we are trying to
simplify them but keeping the rules on basics such as
humidity," Tin elaborated on his project.
Interest in his work is strong.
"I think it is working.
Because of the scarcity of medicinal plants nowadays,
many community members and households want to grow
medicinal plants in their home gardens but they are
finding it very difficult. That's why we are trying to
help them," he said.
According to Tin, the Dao people
were traditionally shifting cultivators who would stay in
one area for several years before moving on to new areas.
"Nowadays, the forest cover in
Vietnam is going down, our government is trying to settle
them in one place," he said.
But the old habit presents a big
problem to the government policy and it's very difficult
to train the people in new ways.
Given the situation, information
from Tin's research on ecological condition of medicinal
plants helps: "We also keep the rights of the local
people. We know the secret of their special prescription
but we don't try to do anything to market it or
jeopardise their intellectual property rights. If there
are benefits, the benefits should return to the
community. This is very important," Tin said.
Besides Vietnam, the Dao people
are also found in Myanmar, Thailand and
Laos.
Tin, himself of ethnic Sang Chay
whose ancestors originated from Kwangtong, China, first
graduated from College of Pharmacy in North Vietnam.
"So, my basic is pharmacy. But
after graduating, I went to study plant botany. So, I
have a Masters degree in botany," he said.
"Pharmacy and botany is very
strong in Vietnam because we have two systems - modern,
western medicines and traditional medicines because the
latter has a very big following."
"Because of the close
relationship between the two systems, we need to study
botany which is a very difficult subject because you have
to remember hundreds of family names - their
characteristics such as alternate leaves, opposite
leaves, flowers etc," Tin laughed.
On the applied ethnobotany training
course conducted under Dr. Gary Martin at Kinabalu Park,
Tin said he had no regrets being part of it: "It's
very good and very useful. By this course, I learn a very
good way to gather data systematically and how to solve
problems in each country. In fact, we are doing some
parts of that in Vietnam," he said.
But besides big projects on the
conservation of medicinal plants, Vietnam also has
programmes on conserving general useful plants, fruit and
timber plants, he said.
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