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논문 기본 정보

자료유형
학술저널
저자정보
저널정보
강원대학교 산림과학연구소 Journal of forest and environmental science Journal of forest and environmental science 제32권 제4호
발행연도
2016.1
수록면
353 - 366 (14page)

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The effect of different environmental conditions and altitudes on the growth and reproductive characteristics in 12 teak plantations at 4 different blocks (Cauvery canal bank, Topslip and Parambikulam (Tamil Nadu), Nilambur and Wayanad (Kerala) of Southern India was investigated. The annual rainfall and mean monthly temperature of the study areas varied significantly from 1390 to 3188 mm and 16 to 38℃ respectively. The teak plantations in Cauvery canal bank which grow in continuous moisture condition (8-10 months) retain the leaf for longer period due to moisture resulting continuous supply of photosynthates leads to fast and outstanding growth. The girth at breast height (GBH) of 34-years-old tree in canal area was similar to that of 40 to 49-years-old trees in other locations, indicating that teak plantations with regular watering and silvicultural practices may be harvested at the age of 30 years. The leaf fall, flowering and fruiting showed significant variations in different teak plantations due to environmental factors and altitudes. It was found that increase of rainfall enhances number of flowers in the inflorescence in teak. Tholpatty (block-IV) showed more flowering in a inflorescence (3,734-3,744) compared to other plantations (1,678-3,307). Flowering in Nilambur and Wayanad coincided with heavy rainfall resulting low fruitset (1.1-2.3%) probably heavy rainfall ensuing restriction of pollinators for effective pollination. On the other hand, flowering in Cauvery canal bank (Block-I) was not coincided with high rainfall exhibited high fruitset (2-3%). About 66 to 76% of the fruits in different plantations were empty, and it is one of the main reasons for poor germination in teak. The seeds of Topslip and Parambikulam (Block-II) showed higher seed weight, maximum seed filling and good germination indicating that the environmental factors and altitude play significant role in fruit setting and seed filling in teak. In addition, the teak plantations in Topslip and Parambikulam showed good growth suggesting that plantations in the altitude range of approximately 550-700 m may be suitable for converting into seed production areas for production of quality seeds.
#altitude #growth #phenology #rainfall #Tectona grandis

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참고문헌 (63)

참고문헌 신청
Anderson DP / 2005 / Factors influencing tree phenology in Tai National Park, Cote d´Ivoire / Biotropica 37:631~641 google schola Chacko KC / 1997 / Evaluation of some pre-sowing treatments for germination of teak(Tectona grandis Linn. f. )fruits / Ann For 5:55~61 google schola Chmura DJ / 2002 / Variability of beech provenances in spring and autumn phenology / Silvae Genetica 51:123~127 google schola Corlett RT / 1998 / Potential impacts of climate changes on tropical Asian forests through an influence on phenology / Climatic Change 39:439~453 google schola Eamus D / 2001 / Ecophysiology of trees of seasonally dry tropics : comparisons among phenologies / Adv Ecol Res 32:113~197 google schola

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