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Mufid Febrianto
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CORD
Published by International Coconut Community
ISSN : 02151162     EISSN : 27218856     DOI : 10.37833/cord
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Library & Information Science
Aims CORD aims to publish original research results and reviews on research and development. While encouraging those involved in research and developments to disseminate their finding it also assists policy makers and planners to be aware of the latest developments in the sector Scope CORD encompasses a broad range of research topics in animal sciences: seedlings and genetics, farming, harvesting, production, health, biotechnology, and production, socio-economic, and policy.
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Pertanian dan Biologi (Lain-Lain)
Articles 4 Documents
 1 
Search results for , issue "Vol 13 No 02 (1997): CORD" : 4 Documents clear
COCONUT YIELD IMPROVEMENT IN FARMERS' FIELDS THROUGH RESEARCH BASED FERTILIZATION MANAGEMENT IN THE PHILIPPINES Severino S. Magat Ph.D.
International Coconut Community Journal Vol 13 No 02 (1997): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v13i02.309

Abstract

For the past 20 years, the development of leaf analysis or foliar diagnosis ofcoconut, supported and confirmed by a network offertilizer experiments (on­station and on‑farm trials) demonstrated the significance of improving coconut yields in terms Of nuts and copra through balance nutrition or fertilization ofpalms. In the Philippines, emphasis on the correction of the widespread deficiencies in N, Cl, S and K had been achieved even in small‑scale farms with 142% average increase in nut yield and 179% increase in copra terms after 3‑4 years of application at moderate rates offertilizers. Research findings are discussed in relation to the coconut rehabilitation of mature stands and the utilization of coconut hybrids in the ‑ sustainable coconut development.
EVALUATION OF GENOTYPES ARISING FROM F2 GENERATION SEGREGATIONS IN DWARF X TALL CROSSES OF COCOSNUCIFERA WMU Fernando; L. Perera
International Coconut Community Journal Vol 13 No 02 (1997): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v13i02.310

Abstract

Twenty seven F2 generation palms belonging to selfed and crossed families of F1, palms arising from a cross between dwarf green and Tall in Cocos Nucifera were studied for vegetative, reproductive and yield characters. The objective was to study the segregation patterns of the introgressed characters of the Dwarf x Tall hybrid in the F2 generation and, to investigate the effects of selfing. An average of four palms were studied in each F2 family. The time takenfor initial flowering was spread in a greater range in F2 families arising from selfed F1, compared to F2 families originating from crossing two different F1 palms. The pollination behaviour of the palms revealed to be segregating in two selfed F2 families. Two palms, one in each F2 family (selfed F1) were found to be autogamous with overlapping male and female phases whilst the rest showed allogamy. Recombination of the autogamous nature along with the Tall characters were observed in the F2 palms. The results suggest that the genetic control of the pollination behat4our is polygenic and an aggregate of several recessive genes are responsible for the autogamous nature of the palm. Certain genotypes arising from selfed families recorded high husked nut weights (650 ‑ 700 gms) compared to crossed families indicating their resistance to in breeding depression. The possibility of extracting recombined lines with desirable characters in order to improve the Sri Lankan Dwarf x Tall is also discussed
HOST RESISTANCE IN COCONUT LEAVES AGAINST LEAF BLIGHT DISEASE CAUSED BY PESTALOTIOPSIS PALMARUM (COOKE) STEY A. Karthikeyan; R. Bhaskaran
International Coconut Community Journal Vol 13 No 02 (1997): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v13i02.311

Abstract

Total and Ortho dihydroxy were more in younger coconut leaves as compared to the older leaves. Seven phenolic compounds were detected in younger leaves while the older leaves had only six phenolic compounds except chlorogenic acid Phenolic compounds inhibited the mycelial growth and Sporulation of P. palmarum. The quantity of sugars, starch and cellulose were lesser in younger leaves. Carbohydrates increased the mycelial growth and sporulation of the pathogen.
WATER RELATION, GAS EXCHANGE AND DRY MATTER PRODUCTION OF COCONUT (COCOS NUCIFERA, L.) UNDER UNIRRIGATED AND IRRIGATED CONDITIONS K.V. Kasturi Bai; V. Rajagopal; D. Balasimha; P. Gopalasudaram
International Coconut Community Journal Vol 13 No 02 (1997): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v13i02.312

Abstract

The response of local West Coast Tall (WCT) and the two hybrids viz., WCT x Chowghat Orange dwarf (COD) and COD x WCT to moisture availability in terms of water relation, gas exchange and dry matter (DM) production was studied. Discernible differences were noticed between the irrigation treatment (viz., irrigated vs unirrigated) with lower stomatal conductance and transpiration rate in the palms with out irrigation. Irrespective of the cultivar of hybrid leaf water potential was also significantly higher in irrigated palms. Net assimilation rate was lower under uniriigated condition. However genotypic or treatment differences were not significant. Annual DM production also vaned markedly between the irrigation treatments. Treatment differences were significant on the reproductive (RDM) rather then vegetative DM (VDM) production. Under the irrigation treatment the hybrids performed better than the local tall However the percentage reduction in the DM production was relatively less in the local WCT cultivar under unirrigated as compared with irrigated condition. The studies clearly highlighted the beneficial effects of irrigation on DM production and yield in coconut and the adaptability of the local WCT variety under limited water supply than the two hybrids.

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