Volume 47 Number 4 Article 3 Pages: 193-197
Year 1993 Month 10
Title: Comparison of Root Development of Pear Trees on Seedling and Quince A and C Rootstocks
Author: A.S. Devyatov
After 17 years of growing in a sod-podzolic
soil root distributions of 'Byelorussian Late'
pear grafted on pear seedlings and Quince A,
and Quince C were determined by excavation.
Tree spacing was 5 x 3 m (666 plant/ha).
Cultivation system of soil management was
Pear seedlings had a root system
made up of long, large roots, whereas the
quince rootstocks had a root system made up of
a large mass of fibrous roots.
Quince C had a
larger root system than Quince A. The majority
of the roots were concentrated in a layer of 10
to 50 (60) cm.
The quince rootstocks had the
highest density of fibrous roots near the trunk,
once was 2 to 3 times less dense in the middle of
The fibrous root index (=
specific mass of fibrous roots/specific length of
scaffold roots) of quince rootstocks was two
times more as compared with seedling stock.
This index for quince rootstocks was maximum
at the depth of 50 to 100 cm and at the distances
of 1.5 to 2.5 m from the trunk, but for pear
seedlings—near thick roots.
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