Studies on wedge grafting in guava (Psidium guajava L.) under polyhouse and open field conditions
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Date
2016
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Publisher
CCSHAU
Abstract
The present investigation entitled, “Studies on wedge grafting in guava (Psidium guajava L.) under
polyhouse and open field conditions” was carried out at the experimental orchard, Department of Horticulture,
CCS HAU, Hisar and in the polyhouse of the Precision Farming Development Centre of Department of
Horticulture, CCS HAU, Hisar during the year 2015. The study was planned to standardize the optimum time of
wedge grafting in guava viz. second fortnight of January with and without polycap, first and second fortnight of
February with and without polycap, and March first fortnight with and without polycap under polyhouse and open
field conditions in cv. Hisar Safeda. Among different time periods of grafting, second fortnight of February with
capping of grafts under open field conditions, gave higher graft success (83.33%) whereas minimum graft success
(10.00%) was observed under open field conditions when grafting was performed during second fortnight of
January without capping of grafts. The second fortnight of February with capping took minimum number of days
to sprouting (25.3) and first leaf emergence (28.4). Whereas, the maximum days taken to sprouting (43.1) and leaf
emergence (46.8) were observed when grafting was performed during the second fortnight of January without
capping. The maximum sprout length (16.35 cm) and diameter (3.03 mm) was recorded under open field
conditions when grafting was done during February second fortnight with capping of grafts and the minimum
sprout length (2.23 cm) was observed under the open field condition when grafting was performed during January
second fortnight without capping of grafts. The minimum sprout diameter was observed under polyhouse condition
during March first fortnight when the grafts were not covered with polycap (1.69 mm). The total number of leaves
per plant were maximum (24.34) under February first fortnight with polycap and minimum under grafting
operation performed during March first fortnight without polycap (14.83).The maximum leaf area per plant was
noticed under open field condition during second fortnight of February associated with capping of grafts (1238.5
cm2) and the minimum was observed under open field condition when grafting operation was performed during
January second fortnight without capping (433.1 cm2).The maximum chlorophyll a and b content was observed
under open field condition during February second fortnight grafting with capping of grafts (1.050 mg/g fw and
0.420 mg/g fw) and the minimum was recorded under open field condition during January second fortnight
grafting without capping of grafts (0.837 mg/g fw and 0.253 mg/g fw). Maximum fresh and dry weight per plant
(32.53 g) and (13.77 g) was recorded during February first fortnight with capping of grafts whereas, minimum
(21.16 g) and (9.36 g) was observed for January second fortnight of grafting without capping of grafts.
Description
Keywords
grafting, Developmental stages,Planting, Guavas, Land resources, Fruits, Scions, Biological phenomena, Budding, Vegetative propagation