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Çѱ¹½Ä¹°ÇÐȸ / v.24, no.1, 1981³â, pp.47-57
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( A Consideration on Intraspecific Competition with Particular Reference to Basal Area-class Structure of Even-aged Coniferous Monocultures )
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1979³â ¹× 1980³â¿¡ °æ±âµµ ±¤¸ª°ú ¾çÁÖ±º ¼öµ¿¸é¿¡¼­ ÀúÀû¸éÀû°èÀÇ ºóµµºÐÆ÷ÀÇ skewness¿Í kurtosis¸¦ °ËÁ¤Çϱâ À§ÇÏ¿© ÃÑ 46°³ÀÇ ´ÜÀÏÁ¾ Á¶¸²Áö¿¡¼­ °³¸ñÀÇ ÁÖº¯ÀåÀ» Èä°í¿¡¼­ Àç¾ú´Ù. À̵é Á¶¸²Áö´Â 10~50³âµÈ °ÍÀÌ¸ç ¼öÁ¾Àº À㳪¹«, ³«¿±¼Û, Àü³ª¹« ¹× ¸®±â´Ù¼Ò³ª¹«ÀÌ´Ù. °¢ Áö¼Ò¿¡¼­ÀÇ ÃøÁ¤¼ö´Â 70~110À̸ç ÀúÀû¸éÀû°èÀÇ ¼ö´Â SturgeÀÇ ¹æ½Ä¿¡ µû¶úÀ¸¸ç, 5~10°è¿´´Ù. ¼öµ¿¿¡ À־ ³ªÀÌ(³â)¿Í °³¸ñ ÀúÀû¸éÀû($ extrm{cm}^2$)Àº °¢°¢ 10~20 ¹× 27.60~383À̾úÀ¸¸ç, ±¤¸ª¿¡¼­´Â 15~47 ¹× 102.15~619.14À̾ú´Ù. ÇÑ °÷À» Á¦¿ÜÇÏ°í ¸ðµç °÷¿¡¼­ +g$_1$°ªÀ» ³ªÅ¸³Â°í, 6°³¼Ò¸¦ Á¦¿ÜÇϰí´Â ±× °ªÀÌ 0.3~2.2¿´´Ù. 23°÷¿¡¼­´Â À¯ÀÇÇÑ +g$_1$°ªÀ» ³ªÅ¸³Â´Ù. À̵éÀÇ ÀúÀû¸éÀû°è¼ö´Â 6~9¿´´Ù. ÀÌ»óÀÇ »ç½ÇÀº Á¾³»°æÀïÀÌ ¾à 10³âµÈ Á¶¸²Áö¿¡¼­µµ ½ÃÀÛµÇ¸ç ¾à 50³â±îÁöµµ °è¼ÓµÊÀ» ½Ã»çÇÑ´Ù. 24°³¼Ò¿¡¼­ -g$_2$°ªÀ» ³ªÅ¸³»¸ç À̵éÀÇ °ªÀº -0.12~-0.83ÀÇ ¹üÀ§¿´´Ù. ¾à 20°÷¿¡¼­´Â +g$_2$°ªÀ» ³ªÅ¸³ÂÀ¸¸ç ±× ¹üÀ§´Â +0.13~+3.841À̾ú´Ù. 22°³ÀÇ +gÁß 11ä´Â ¸Å¿ì À¯ÀÇÇÑ °ÍÀ̾ú´Ù. ´ÜÁö 5¸¸ÀÌ À¯ÀÇÇÑ Kolmogorov-Smirnov °ËÁ¤°á°ú¸¦ ³ªÅ¸³Â´Ù. 4Á¾Áß ³«¿±¼ÛÀÌ °¡Àå ³ªÀÌ ¾î¸° ½ÃÀý¿¡ Á¾³»°æÀïÀ» ½ÃÀÛÇÏ°í ±× ´ÙÀ½ÀÌ Àü³ª¹« ±×¸®°í À㳪¹«ÀÇ ¼øÀ¸·Î °æÀïÀ» ½ÃÀÛÇÏ´Â °Í °°´Ù. ÀÌ ÀÚ·á´Â ÀúÀû¸éÀû°èÀÇ ºóµµºÐÆ÷¸¦ ÅëÇÏ¿© Á¾³»°æÀïÀ» ŽÁöÇϰíÀÚ ÇÒ ¶§ ÀûÁ¤ °è(±Þ)¼ö´Â 12ÀÌ»óÀÌ ¾Æ´Ï°í 6~9À̸ç ÀûÁ¤ °üÃø¸ñ¼ö´Â 100ÀÌ»óÀÌ ¾Æ´Ï°í ¾à 80ÀÓÀ» ½Ã»çÇÑ´Ù. ÇÊÀÚ´Â ÀúÀû¸éÀûÀÇ ºóµµºÐÆ÷°¡ Á¾³»°æÀïÀÌ ÀÖÀ» ¶§¿¡´Â bimodal ºÐÆ÷¶ó±â º¸´Ù´Â trimodal ºÐÆ÷¸¦ ³ªÅ¸³»°í ÀÖ´Ù°í »ý°¢ÇÏ¸ç ¶ÇÇÑ Á¾³»°æÀïÀÌ ¾àÈ­µÇ¾î ÀúÀû¸éÀûºóµµºÐÆ÷°¡ Á¤»óºÐÆ÷ ´Ü°è¿¡ µµ´ÞµÇ±â Àü¿¡ ¹Ù·Î platykurticºÐÆ÷·Î µÇ´Â °ÍÀÌ ¾Æ´Ï°í leptokurtic ºÐÆ÷Àû ´Ü°è¸¦ °ÅÄ£´Ù°í º»´Ù
Girth at breast height was measured to test skewness ($g_1$) and kurtosis ($g_2$) of frequency distribution of the basal area in terms of t-test and Kolmogorov-Smirnov test for a total of forty six monocultures within Sudong and Kwhangnung area in central part of Korean peninsula in 1979 and 1980. The monocultures are about 10 to 50 years old, and four kinds: Pinus koraiensis, Larix kaempferi, Abies holophylla and Pinus rigida. Most of the sample sizes per site were ranged 70 to 110 excluding 4 sites. The number of classes interval was based on Sturges rule for each monoculture and was ranged from 5 to 10. In Sudong the range of age(yr) and basal area (($cm^2$)/tree) of the monocultures were from 10 to 20 and from 27.60 to 383. for Kwhangnung they were from 15 to 47 and mostly 102.15 to 619.14, respectively. All 43 monocultures except 1 showed +$g_1$, which ranged from 0.3 to 2.2 except six sites. Of the total 46 sites, 23 sites showed significant +$g_1$ which includes about 10 year-old monoculture. The number of classes interval with significant positive skewness ranged from 6 to 9. The data suggest that intraspecific competition in terms of stand structure seems to appear from about 10 year-old monocultures, and it may even last to about 50 year-old one. Around 24 monocultures showed nonsignificant -$g_2$ except one. Most -$g_2$ ranged from -0.12 to -0.83. Around 20 monocltures showed positive $g_2$ ranging from +0.13 to +3.841. Of the 22 +$g_1$, majority of 11 were very highly significant. Of all monocultures only 5 showed significant result from Kolmogorov-Smirnov test. Of the 4 species, Larix kaempferi seems to show density stress first then Abies holophylla, and Pinus koraiensis last. Data of this study indicate that adequate number of classes intervals and sample sizes for studying intraspecific competition in terms of basal area are 6 to 9 and 80 trees rather than 12 and 100 trees, respectively. It also suggests that most of the frequency distribution of basal area class are trimodal rather than bimodal under density stress. It is proposed that the leptokurtic distribution appears before normal distribution rather than direct change from platykurtic to normal distribution of basal area for selected stages in the development of stands.
 
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Journal of Plant Biology / v.24, no.1, 1981³â, pp.47-57
Çѱ¹½Ä¹°ÇÐȸ
ISSN : 1226-9239
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO198111922411152)
¾ð¾î : Çѱ¹¾î
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