สืบค้นงานวิจัย
Vulnerability of Hevea Seed Production to Climate Change: Results of a Survey Done In Intermediate and Wet Zones of Sri Lanka
N.M.C. Nayanakantha - ไม่ระบุหน่วยงาน
ชื่อเรื่อง (EN): Vulnerability of Hevea Seed Production to Climate Change: Results of a Survey Done In Intermediate and Wet Zones of Sri Lanka
ผู้แต่ง / หัวหน้าโครงการ (EN): N.M.C. Nayanakantha
บทคัดย่อ (EN): According to general consensus, seed production of rubber (Hevea brasiliensis) had been satisfactory and well above the requirement of nurseries till the late 1980’s in the Wet and Intermediate Zones of Sri Lanka. However, after late 1980’s there were many complains specially from the nurserymen in the wet region of Sri Lanka that there is a shortage of seed production. Possible reasons which may have contributed to this could be the changes in weather patterns, change in clones planted and disease incidence. Thus, a survey was done on Hevea seed production during 2003 and 2004 in selected rubber plantations in Kurunegala and Kalutara districts representing Intermediate and Wet Zones of Sri Lanka with respect to annual rainfall distribution. Results of the study show significant differences in the production of seeds between Agro-climatic regions, among clones and also in the time periods (2003 and 2004). A significant higher seed production was observed in all three clones (RRIC 100, PB 86 and RRIC 121) irrespective of their age groups in the Intermediate Zone than in the Wet Zone. However, clonal and age effects were also existed in both zones and significantly a lower seed production was existed in 2003 than in 2004. RRIC 100 produced a higher number of seeds per hectare in both zones at both age categories in both the years. RRIC 121 produced the lowest seed production in both the zones irrespective of the age. In the Wet Zone, a considerable seed production was observed in RRIC 100 in the old age category only. This regional difference can mainly be attributed to direct and indirect influences of climatic differences. Among the climatic factors, rainfall has a direct impact on seed production from flowering up to seed fall. Although a significant increasing or decreasing trend in the total rainfall in each year in Kalutara district of the Wet Zone could not be identified for the last 30 years, variations in onset and ending of rains in South West and North East monsoons and also inter monsoonal periods and uneven distribution of rainfall in each month have been observed from 1990-2004. This variation in rainfall pattern might have contributed greatly either directly or indirectly on Hevea seed production although the other climatic factors, disease conditions and clones have cumulatively contributed to the lower seed production in the Wet Zone of Sri Lanka.
บทคัดย่อ: ไม่พบข้อมูลจากหน่วยงานต้นทาง
ภาษา (EN): en
เผยแพร่โดย (EN): การยางแห่งประเทศไทย
คำสำคัญ (EN): Wet Zone
เจ้าของลิขสิทธิ์ (EN): การยางแห่งประเทศไทย
หากไม่พบเอกสารฉบับเต็ม (Full Text) โปรดติดต่อหน่วยงานเจ้าของข้อมูล

การอ้างอิง

N.M.C. Nayanakantha. "Vulnerability of Hevea Seed Production to Climate Change: Results of a Survey Done In Intermediate and Wet Zones of Sri Lanka". ไม่ระบุหน่วยงาน. ม.ป.ป.

N.M.C. Nayanakantha. "Vulnerability of Hevea Seed Production to Climate Change: Results of a Survey Done In Intermediate and Wet Zones of Sri Lanka". ไม่ระบุหน่วยงาน. ม.ป.ป.. Print.



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Vulnerability of Hevea Seed Production to Climate Change: Results of a Survey Done In Intermediate and Wet Zones of Sri Lanka
N.M.C. Nayanakantha
การยางแห่งประเทศไทย
ไม่ระบุวันที่เผยแพร่
INVOLVEMENTS IN RURAL SOCIETIES BY SMALLHOLDER RUBBER FARMERS IN SRI LANKA IMPROVEMENT AND APPLICATION OF THE TECHNIQUE OF MINI-SEEDLING BUDDING OF HEVEA BRASILIENSIS Results of Some Hevea Clones from the Large Scale Clone Trials in Cambodia Concept of Crop Secondary Yield and Its Application in Research and Production of Hevea Tree Effects of drought and tapping for latex production on water relations of Hevea brasiliensis trees Seasonal Variation on Crop-Weather Relation in Hevea Grown Under the Sub-Himalayan Climate of West Bengal A Benchmark Survey on Rubber Growing in Mindanao Functional Characterization of a Novel Hevea â-1, 3-Glucanase Gene Promoter and Its Regulatory Role in Hevea and Tobacco Tissues Distribution of Hevea brasiliensis in South and Northeast India: Preliminary Results with Maximum Entropy Species Distribution Model Investigation of Transcription Factor bHLH in Hevea
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