Canopy architecture, photosynthesis and yield of irrigated cocoa

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dc.contributor.authorGeorge Thomas
dc.date.accessioned2014-05-28T11:00:59Z
dc.date.available2014-05-28T11:00:59Z
dc.date.issued2007-02-08
dc.description.abstractAn optimum canopy architecture, density and shape of cocoa should be maintained to be accommodated in the available light and air space of arecanut or coconut based high density multispecies cropping system. In a tree like cocoa with large horizontally inclined leaves, many leaves receive light far below the light compensation point. The removal of these 'parasitic leaves' which require import of photo-assimilates from other leaves to meet their growth and maintenance may increase the partition of photoassimilate to the economic product. The removal of bottom shaded branches can facilitate agronomic practices like weeding, spraying and also harvesting. Besides, though farmers do give pruning to cocoa once in an year; systematic study on pruning effects on physiological and biochemical characters and yield have not been done. With this in view, a study was carried out to evolve an optimum canopy architecture and density of cocoa by giving different levels of pruning. Five different types of pruning (unpruned control T1 , unpruned double storied T2 , pruned cone shaped T3, severely pruned T4 , and pruned flat spreading canopy T5 ) were given during September 1988 and the physiological and biochemical characters, photosynthetic behaviour, light interception efficiency, growth characters and yield were studied. Observations were made thrice in an year viz at the onset of flowering (October/November 1988 -S2) at the time of peak pod load (March/April 1989 S2 ) and just after the completion of harvesting (September 1989 - S3 ) for all characters excepting growth characters and yield. Growth measurements were taken twice; once at the beginning of the experiment just after pruning and the other at the end of the experimental period. Annual yield of pods was recorded. Due to pruning (T3,T4 and Ts ) the canopy area and number of bearing branches were significantly reduced. A significantly low light interception efficiency with a correspondingly high PAR.en_US
dc.identifier.citationM.Phil, dissertation. Mangalore University, Mangalore 1990 p-52en_US
dc.identifier.urihttp://hdl.handle.net/123456789/1984
dc.language.isoenen_US
dc.subjectcanopy architecture
dc.subjectphotosynthesis
dc.subjectyield
dc.subjectirrigation
dc.subjectcocoa
dc.titleCanopy architecture, photosynthesis and yield of irrigated cocoaen_US
dc.typeBooken_US

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