ЭлБиб

DWARFING FRUIT TREES BY MICROINTERSTOK

Wladyslan Poniedzialck

Akadctnia Rolnicza w Krakowie, Poland

Introduction

Ring-bark-grafting gives the same ell eels as girdling, and is lea

ding to development of a little interstock (microinteratock) if hark is

taken from dwarf roolstock.Lcngth of the inters!ock is the same as

the width of the bark grafted. Roberts (1934) conducted the first

Inals to use the method in apple nursery. Lockard and Schneider

(1981 ) raported that bark-grafting is the key to the dwarfing

mechanism in fruit trees. IAA translocation through grafted bark

in apple was investigated by Antoszewski etal( 1978).Poniedzialck el

ak(I979) researched analaimcal changes in the grafted apple bark

rings.

Material» and methods

One year apple trees cv. Red Boskoop were planted in spring

1993. In May the rings of bark 2 cm in width, from M 9 and В

9rootstoeks were grafted an the trunks.The same rings were graf

ted on some trees in the next year.

Results

Wounds healed quick!} but come trees died especial}* after

grafting in the first year. Only a little swelling of the trunk above the

microintei stocks ocurred. During the drought in Summer 1994 some

leaves in lower parts of the shoots became yellow and fell oil. The

dwarfing effect of microinterstacks was significant as we can see in

Table!.

Table 1. Total shoot length of Red Boskoop trees in autumn 1994

Treatments

Number

of shoots

Length

of shoots

Dwarfing

Untreated control

6,5 c

258 c

100

Microinterstock from M 9

3,2 b

112b

2 Micromterslocks from M 9 0,6 a

12a

Microintei stocks from В 9 3,2 b

130 b

2 Microinterstockss В 9

1,6 b

35 a

Научная электронная библиотека ЦНСХБ