http://www.dizonexoticfruittrees.com/tech/tech04.htm

http://www.dizonexoticfruittrees.com/tech/tech04.htm

List of exotic
fruit trees for sale (double rootstock)

{{gwi:1335227}}



DOUBLE ROOTSTOCK. About 4.5
years ago, Dr. Rodolfo C. Undan and Bernardo
Dizon planted two grafted mango trees in a not-so-favorable area at
the Central Luzon State University. One had single rootstock while the
other had two. Today, the one with double rootstock (right being pointed
to by Dr. Undan) is virtually double in sized compared to the one with a
single rootstock being pointed by Dizon at left. In another planting in a
private farm in Bulacan, Dizon said that a four-year-old mango tree with
double rootstock has caught up with an 8-year-old grafted tree with single
rootstock. Dizon has been employing the double rootstock technique to
hasten the growth of his mother trees so he could produce more budsticks
within a shorter time. That is the same technique he had used in his
mother plants of longkong, a special variety of lanzones from Thailand

ÃÂ

The root system is the basic foundation of plants. It
consists of a primary root used for anchorage and lateral roots with hairs that
absorb water and nutrients; and oxygen for respiration.

Plant's growth depends solely on root development,
which normally takes years before attaining productive or fruiting stage. This
growth phenomenon is generally observed throughout the world especially in
temperate countries hat have two dormant
seasons, autumn and winter. When the roots are injured or diseased, there will
be no growth. As the roots grow, corresponding growth shall also be observed on
the upper portion of the plant. Therefore, if a plant has more developed root
system, its growth will be accelerated, thus, enhance physiological maturity and
early fruiting.
Multiple rootstock or multi-root system is the growing of plants with two or
more rootstocks. Fruit exporting countries like Taiwan, Thailand and Australia
are practicing this technique.
Mr. Rush of Balibago, of Clark Airbase, Pampanga
revealed that his late father, a professor in the University of Michigan U.S.A.,
had used the multiple rootstock technology in his plantations of oranges and
apples since the early 60's.
In the Philippines, Engr. Telesforo L. Umali and his late brother National
Scientist Dean Dioscoro L. Umali of U.P. Los Ba�os pioneered multiple
rootstocking. Engr. Umali regularly harvests fruits twice a year from his triple
rootstock durian and rambutan that were planted way back in 1980 in Scout
Borromeo, QC.

Mr. Ramon Cua, a businessman, observed in Taiwan that lychees and other fruit
trees had double or triple rootstocks making the tree prolific. A Taiwanese
consultant friend of Mr. Cua first introduced double and triple rootstocking of
calamansi and passion fruit in Cavite during the early's '80s.{{gwi:1335229}}

ÃÂ