The Effects of Water Availability on Mature Cocoa Plant

Yeedum, Ibrohem (1988) The Effects of Water Availability on Mature Cocoa Plant. Masters thesis, Universiti Pertanian Malaysia.

[img] PDF
3543Kb

Abstract

In Malaysia cocoa is usually grown in areas where prolonged drought is absent in Malaysia. In order to increase cocoa acreages, it may be necessary to extend cocoa planting to the northern areas of the Peninsular Malaysia where prolonged dry period occurs for several months in a year. A study is therefore carried out to observe the effects of reduced water availability on growth and productivity of mature cocoa. The results of the experiments showed that flowering in cocoa is rot dependent on soil water availability. Mild water stress at 75 to 80 percent of available soil water for one month, reduced leaf water potential, but not the yield of mature cocoa. When the mild water stress was prolonged to two mnths, the effect was similar to that exposed to 30 to 70 percent of available soil water for shorter periods. Yields were reduced through an increase in percentage cherelle wilt which comes about from reduced photosynthate production. Water stressed condition results in highly negative leaf water potential which brings about stomatal closure and reduced photosynthesis. It can therefore be concluded that under conditions of reduced water availability, irrigation is necessary to maintain sufficient water supply to maintain plant growth and productivity of the cocoa plant at the optimum level. Irrigation however has to be managed to prevent over supply of water which also is deleterious to plant growth and productivity.

Item Type:Thesis (Masters)
Subject:Cocoa - Water - Case studies
Chairman Supervisor:Associate Professor Dr. Raja Muhammad Raja Harun
Call Number:FP 1988 2
Faculty or Institute:Faculty of Agriculture
ID Code:10240
Deposited By: kmportal
Deposited On:16 Mar 2011 03:32
Last Modified:16 Mar 2011 03:35

Repository Staff Only: item control page

Document Download Statistics

This item has been downloaded for since 16 Mar 2011 03:32.

View statistics for "The Effects of Water Availability on Mature Cocoa Plant"


Universiti Putra Malaysia Institutional Repository

Universiti Putra Malaysia Institutional Repository is an on-line digital archive that serves as a central collection and storage of scientific information and research at the Universiti Putra Malaysia.

Currently, the collections deposited in the IR consists of Master and PhD theses, Master and PhD Project Report, Journal Articles, Journal Bulletins, Conference Papers, UPM News, Newspaper Cuttings, Patents and Inaugural Lectures.

As the policy of the university does not permit users to view thesis in full text, access is only given to the first 24 pages only.