Record Details

STUDIES ON FLOWERING AND FRUITING BEHAVIOUR OF SAPOTA (Manilkara achras (Mill.) Fosberg) CULTIVARS IN COASTAL REGIONS OF A.P

KrishiKosh

View Archive Info
 
 
Field Value
 
Title STUDIES ON FLOWERING AND FRUITING BEHAVIOUR OF SAPOTA (Manilkara achras (Mill.) Fosberg) CULTIVARS IN COASTAL REGIONS OF A.P
 
Creator B.NARENDRA KUMAR
 
Contributor Dr. L. NARAM NAIDU
 
Subject harvest,pruning,
 
Description An investigation was carried out during 2010-2011 at Horticultural Research Station, Venkataramannagudem, West Godavari District, Andhra Pradesh with the objective of understanding branching pattern and its relation to flowering, fruiting behaviour and pattern of fruit development in different cultivars of sapota.
The experiment was carried out with 11 varieties viz. Cricket Ball, Pala, Kalipatti, Singapore, DHS-1, DHS-2, PKM-1, PKM-2, PKM-3, CO-1, CO-2 in a Randomized Block Design (RBD) with three replications. The canopy of the tree was divided into three strata viz. lower strata (up to 1/3rd height of the canopy from ground level), middle strata (1/3rd to 2/3rd height) and upper strata (top 1/3rd height of the canopy) and data were recorded on randomly selected branches of all the strata. The terminal portion of branch was designated as N order and the subtending orders as N-1, N-2 and so on and observations were recorded from tip downwards of a branch.
Irrespective of the strata and variety, the mean number of branches produced at different orders decreased gradually from tip downwards with maximum values recorded at N order i.e., the tip. The number of branches ranged from 2.890 (N order) to 0.906 (N-7) in the lower strata, from 2.760 (N) to 0.681 (N-6) in the middle strata and from 2.555 (N) to 0.879 (N-5) in the upper strata. Relatively higher number of branches was produced in lower strata compared to the middle and upper strata. Among the cultivars maximum number of branches were recorded in lower strata (2.181), and middle strata (2.184) by cv.DHS-2 whereas in the upper strata by cv. Pala (2.079).
The number of flowers and flower bearing units (branches) decreased from tip downwards irrespective of the strata and variety .The number of flowers ranged from 1.160 (N-7) to 5.247 (N-2) in the lower strata, from 1.353 (N-6) to 4.550 (N-2) and from 1.803 (N-5) to 4.264 (N-3) in the middle and upper strata respectively. Flowering was intense at N-2 to N-4 orders. Among the varieties, highest number of flowers was recorded in lower strata of cv. PKM-1 (5.073), in middle strata of cv. Kalipatti (5.693) and in upper strata of cv.PKM-2(5.392).
The fruit set at different branch orders decreased gradually from tip downwards. The number of fruits produced ranged from 0.315 (N-7) to 1.480 (N-2) in the lower strata, from 0.572 (N-6) to 1.321 (N-3) in the middle strata and from 0.482 (N-5) to 1.534 (N-3) in the upper strata. The per cent set also followed trends similar to that of number of fruits produced. Among the different varieties, cv. PKM-1, Kalipatti and Pala produced higher number of fruits over other varieties in all the strata. Relatively higher number of fruits were produced on the branches of lower strata as compared to those on middle and upper strata. Thus, fruiting was mainly concentrated on the lower strata and on laterals produced at orders N-2, N-3 and N-4.
The number of days required from fruit set to harvest differed significantly with the varieties. The cv. DHS-2 recorded the highest number of days (263.46) to attain harvestable maturity followed by cv. DHS-1 (258.00) and Cricket Ball (257.93) while the lowest was observed in cv. PKM-1 (189.33). The weight was maximum in cv. Cricket Ball (123.20 g) followed by cv. DHS-1 (122.40 g) while it was minimum in cv. Pala (32.09 g) and PKM-1 (46.18 g). The pattern of fruit development in terms of fresh weight of the fruit followed double sigmoid growth curve and maximum increase in fruit weight was observed between 150- 210 days after set.
The number of flowers and fruits produced were positively correlated with the total number of lateral branches produced at different orders. Further research on canopy management by way pruning and its impact on fruiting of sapota has been suggested.
 
Date 2016-07-22T15:21:40Z
2016-07-22T15:21:40Z
2011-08
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/69385
 
Language en
 
Format application/pdf
 
Publisher Dr. Y.S.R. HORTICULTURAL UNIVERSITY