Major features of decline of Pinus sylvestris var.mongolica plantation on sandy land

Abstract

Abstract: In view of the decline of man-made sand-fixation forest of Pinus sylvestris var.mongolica in Zhanggutai sand land of Liaoning Province,this paper studied the major characteristics of the decline.The appearance of the declining man-made sand-fixation forest of Pinus sylvestris var.mongolica was grey green,its needle leaf was very thin,the blooming and fruiting rate was low,the average quantity of cones per tree was only 10.4～16.5,with only 6.96g to 7.39 g per thousand seeds,and there were many empty and astringent seeds.The seasonal dynamics of nutrients in 2-year-old pine needle leaf was similar,i.e.,the N and P contents decreased,while K content increased,showing that the nutrient cycle was imbalance.The chlorophyll content in 2-year-old needle leaf of declined forest was high,while that in 1-year-old healthy forest was also high but with a wide increasing range.The infected harm of shoot blight was the clearest mark to the decline of man-made sand-fixation forest of Pinus sylvestris var.mongolica.After the forest declined,the height and the DBH of the pine trees decreased evidently,and the structure of DBH distribution moved “left".The quantity of weak pine trees increased by 15.9%～27.2%,the roots decreased by 22.9%～28.9%,and the absorbing roots (diameter <0.5 cm) decreased most seriously.

Key words: Pinus sylvestris var.mongolica, Sand-fixation plantation, Decline traits, Shoot blight

CLC Number:

S718

WU Xiangyun, JIANG Fengqi, LI Xiaodan, XUE Yang, QIU Sufen . Major features of decline of Pinus sylvestris var.mongolica plantation on sandy land[J]. Chinese Journal of Applied Ecology, 2004, (12): 2221-2224.

References

[1] Bai Y-Q(白云庆), Hao W-K(郝文康). 1986. Forest Mensuration.Beijing: China Forestry Press. 62～120 ( in Chinese)
[2] Feng L(冯林), Yang Y-G(杨玉珙). 1986. Introduction of Mongolian pine into three-north region. J Inner Mongolia For Coll( 内蒙古林学院学报), (1):1～7(in Chinese)
[3] Huang J-K(黄建奎), Gao H-J(高宏军), Liu Y-Q(刘玉琴).1997. The causes and control of sphaeropsis shoot blight on Pinus sylvestris var. mongolica. For Monthly(林业月报), ( 11 ): 16～17(in Chinese)
[4] Li Y-M(李耀民), Yang C-B(杨传波), Li B-N(李宝年), et al.2002. Determination of the loss and control index of shoot blight of Pinus sylvestris var. mongolica. J Northeast For Univ ( 东北林业大学学报), 30( 1 ): 33～35(in Chinese)
[5] Li Y-M(李耀民), Yang C-B(杨传波), Huang J-L(黄敬林), et al. 2003. Potential infection of shoot blight of Pinus syevestris var.mongolica . J Northeast For Univ ( 东北林业大学学报 ), 31( 2 ) :23～24(in Chinese)
[6] Lei Z-Y(雷泽勇),Zhang X-L(张学丽),Zhou F-Y(周风艳).1996. Drought-resistance of Pinus sylvestris var. mongolica on sandy soil. For Sci Technol(林业科技), (1) :6～8(in Chinese)
[7] Jiao S-R(焦树仁). 1989. The Structure and Function of Sand-fixing Forests in Zhanggutai. Shenyang: Liaoning Science & Technology Press. 9～11 ( in Chinese)
[8] Pang L-J(庞丽杰), Yang C-B(杨传波), Li B-N(李宝年), et al.2003. The epidemic factors of shoot blight for Pinus sylvestris var.mongolica and seasonal epidemic dynamics. J Northeast For Univ (东北林业大学学报), 31 (5): 27～29(in Chinese)
[9] Shen B-K(沈伯葵). 1991. The current studies of die-back of pines.Jiangsu For Sci Technol ( 江苏林业科技 ), (1):39～41(in Chinese) .
[10] Song X-D(宋晓东), Liu G-R(刘桂荣), Chen J-y(陈江燕), et al.2002. Studies on the pathogenicity of Sphaeropsis sapinea. For Sci (林业科学), 38 (4): 89～94 (in Chinese)
[11] Song X-D(宋晓东), Chen J-Y(陈江燕), Liu G-Y(刘桂荣), et al.2000. Infection and occurrence regularity of Pinus sylvestris var.mongolica sphaeropsis blight. For Pest Disease ( 森林病虫通讯 ),19(4): 14～17(in Chinese)
[12] Song X-D(宋晓东), Liu G-Y(刘桂荣), Chen J-Y(陈江燕 ), et al.1999. The fungicidal control of sphaeropsis shoot blight on Mongolian Scots pine nursery seedlings. J Northeast For Univ(东北林业大学学报), 27 (6): 22～24 ( in Chinese )
[13] Stannosz GR. 1997. Persistence of Sphaeropses sapinea on or in asymptomatic shoots of red and Jack pines. Mycologia, 89(4) :325～350
[14] Wang Z-M(王志明),Liu G-R(刘国荣),Wang Y-M(王永民),et al. 1997. Investigation into the large-scale yellowing and dying of Pinus sylvestris var. mongolica in plantations of Jilin. Jilin For Sci Tech (吉林林业科技), (3) :40～41(in Chinese)
[15] Xiang C-T(项存悌), Yuan S-Z(原树忠), Meng F-R(孟繁荣).1981. Shoot-blight of Pinus sylvestris var. mongolica . J Northeast For Univ(东北林业大学学报), 9(2): 1～9(in Chinese)
[16] Zhang J-L(张建龙). 1994. Summarizing experience and improving understanding to speed up the spread of Mongolian pine. Protect For Sci Technol(防护林科技), (3) :8～11(in Chinese)
[17] Zhang X-Z ( 张宪政 ). 1994. Experimental Technology of Plant Physiology. Shenyang: Liaoning Science & Technology Press. 66～69( in Chinese)
[18] Zhao X-L(赵兴梁), Li W-Y(李万英). 1963. Mongolian Pine. Beijing: Agricultural Press. (in Chinese)
[19] Zhao X-L ( 赵兴梁 ). 1958. Preliminary investigation report on Mongolian pine forest on Hulunbeier sandy land. Acta Phytoecol Geobot Sin (植物生态学与地植物学丛刊), ( 1 ): 90～180 (in Chinese)
[20] Zhang J-C(张锦春), Wang J(汪杰), Li A-D(李爱德), et al.2000. Research on root distribution and growth adaptability of Pinus sylvestris var. mongolica. Protect For Sci Technol (防护林科技), (3) :46～48(in Chinese)