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D T Mathes
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INTEGRATION OF PASTURE, FODDER AND CATTLE IN COCONUT SMALL HOLDINGS L V K Liyanage; H P S Jayasundera; D T Mathes; D N S Fernando
International Coconut Community Journal Vol 5 No 02 (1989): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v5i02.228

Abstract

A farming system was established in a 45 year old coconut plantation at Rathmalagara Estate, Madampe, in the North Western Province of Sri Lanka. The main objective of this study was to evaluate the performance of an integrated farming system in relation to coconut production and productivity of land. Results inclicate that there has been no adverse effect on coconut and copra production clue to the establishment of the integrated system. The substitution of inorganic fertilizer mainly nitrogen and partly phosphorus and potassium through the integration of animals, fodder and pasture system did not affect the critical levels of nutrients in coconut leaves of treatment plots. Furthermore, feed supply through pasture/fodder in the system was adequate for cattle throughout. In terms of animal perfor­mance the average live weight gains were 306 g/head/day at the end of the first year. The most remarkable feature was that the integrated system reduced the cost of inorganic fertilizer for coconut by 69%, thus reducing the cost of production of coconut. Based on the overall results it is suggested that the integrated system is more productive and beneficial than a monoculture system to coconut small holdings.
PHYSIOLOGICAL ASPECTS OF IN VITRO-GROWN COCONUT (Cocos nucifera L.) PLANTS DURING ACCLIMATIZATION C S Ranasinghe; L K Weerakoon; Y M H Liyanage; D T Mathes
International Coconut Community Journal Vol 15 No 02 (1999): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v15i02.332

Abstract

The physiological status of in vitro-grown coconut (Cocos nucifera L.) plants during acclimatization was studied using nursery-raised seedlings as the control. The percentage of open stomata in leaves of in vitro-grown coconut plants was high at the initial stage of acclimatization but decreased during the course of acclimatization indicating an improvement in stomatal regulation. A progressive increase in the stomatal density, epicuticular wax deposition and leaf thickness in in vitro-grown plants was observed during acclimatization. As a result of the low light intensity, the epidermal cells of in vitro-grown plants were narrower and longer when compared to the control. With the exposure of plants to increased light intensity, the cells became wider and shorter as observed in the control. The leaf chlorophyll content was high in in vitro-grown plants under low light intensity. With increasing light intensity, a reduction in leaf chlorophyll content in vitro-grown plants was observed and at the later stages of acclimatization, it was comparable to that of the control. Variations in the rates of photosynthesis and transpiration in vitro-grown plants were observed in response to the changing environmental conditions. However, at the end of acclimatization, where the plants were ready to be transferred to the field, the physiological statuses of in vitro-grown coconut plants were comparable to that of nursery raised seedlings. The present study revealed that the embryo-cultured coconut plants could adjust well to the changing environmental conditions during acclimatization.
Co-Authors C S Ranasinghe D N S Fernando H P S Jayasundera L K Weerakoon L V K Liyanage Y M H Liyanage