PROPAGATION OF APPLE (Malus × domestica Borkh.) CLONAL ROOTSTOCKS THROUGH MOUND LAYERING UNDER SHADE NET CONDITIONS
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Date
2022-11
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Publisher
UHF,NAUNI
Abstract
ABSTRACT
The present investigation entitled “Propagation of apple (Malus × domestica Borkh.) clonal rootstocks
through mound layering under shade net conditions” was carried out in the Bajoo farm of Department of Fruit
Science, Dr Y. S. Parmar University of Horticulture and Forestry, Nauni, Solan (HP) during the year 2021-22.
The experiment consists of four media treatments (M1- Cocopeat; M2 – Sawdust; M3 – Cocopeat + Sawdust
(1:1); M4 – Soil) and three clonal rootstocks treatments (C1 – M 116; C2 – EMLA 111 and C3- MM106)
replicated five times and was laid out in Randomized Block Design (factorial). IBA treatment of 2500 ppm was
used. The result obtained from the experiment revealed that the highest adventitious roots per stool shoots
(165.86), total root length (2.00 m), root diameter (1.05 mm), fresh weight of roots (9.76 g), dry weight of roots
(3.72 g), length of rooted stool shoots (182.53 cm), diameter of rooted stool shoots (9.35 mm), fresh weight of
rooted stool shoots (78.27 g), number of leaves per rooted stool shoot (87.86) and leaf area (47.13 cm2), was
found in stools treated with treatment M3 (Cocopeat + Sawdust). However, the maximum dry weight of rooted
stool shoots (41.96 g) and total plant biomass (45.10 g) was recorded in stools treated with M4 (Soil) and M1
(Cocopeat) gave the maximum root: shoot ratio (0.08). With respect to clonal rootstocks, C2 (EMLA 111)
rootstock had the highest number of adventitious roots per stool shoots (163.40), total root length (2.23 m), root
diameter (1.28 mm), fresh weight of roots (14.65 g), dry weight of roots (6.18 g), length of rooted stool shoots
(200.00 cm), diameter of rooted stool shoots (10.59 mm), fresh weight of rooted stool shoots (110.27 g), dry
weight of rooted stool shoots (60.53 g), number of leaves (100.15), leaf area (60.30 cm2), root: shoot ratio (0.10)
and total plant biomass (66.71 g). From the present investigation, it can be concluded that the combine
application of growing media (Cocopeat + Sawdust) resulted in better rooting and growth of stool shoots in
EMLA 111 and M 116, whereas, in MM 106 cocopeat resulted in better rooting and plant growth. With respect
to different clonal rootstocks, EMLA 111 resulted in better rooting in mound layering and plant growth under
shade net conditions.