西南桦人工林生长规律研究
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摘要
为揭示西南桦人工林生长规律,为西南桦人工林的经营管理提供科学依据,采取定点定株连续观察法研究广西百色市靖西县五岭林场西南桦人工林生长过程。结果表明,15a生西南桦人工林树高、胸径、材积分别达到19.7m、20.2cm、0.315 5m~3·株~(-1)。幼林的树高和胸径生长量随树龄增长而增大,5a生达到高峰,之后随树龄增长而下降。材积连年生长量、年均生长量分别在第5年和第13年达到高峰。材积连年生长率与年均生长率曲线在14a相交,表明西南桦数量成熟年龄为14a。西南桦林分的枝下高随树龄增长而增大,自然整枝高峰期在6～7a。
In order to reveal the growth law and provide scientific basis for the management of Betula alnoides plantation,the growth process of B.alnoides plantation was studied by fixed point,fixed plant and consecutive observation in Wuling Forest Farm of Baise,Guangxi.The results showed that individual tree height,DBH and volume of 15-year-old B.alnoides were 19.7m,20.2cm and 0.315 5m~3,respectively.The height and DBH increased with age,and reached the peak at the 5th year,then decreased with the age.The annual increment volume and annual average growth volume reached the peak at the 5th and 13 th year,respectively.The intersecting curve of volume successive-year growth percentage and annual average increment percentage appeared at the 14 th year,which indicated that B.alnoides quantitative mature age was 14 years.The clear bole height increased with the age,and the natural pruning peak appeared at 6-7years.
In order to reveal the growth law and provide scientific basis for the management of Betula alnoides plantation,the growth process of B.alnoides plantation was studied by fixed point,fixed plant and consecutive observation in Wuling Forest Farm of Baise,Guangxi.The results showed that individual tree height,DBH and volume of 15-year-old B.alnoides were 19.7m,20.2cm and 0.315 5m~3,respectively.The height and DBH increased with age,and reached the peak at the 5th year,then decreased with the age.The annual increment volume and annual average growth volume reached the peak at the 5th and 13 th year,respectively.The intersecting curve of volume successive-year growth percentage and annual average increment percentage appeared at the 14 th year,which indicated that B.alnoides quantitative mature age was 14 years.The clear bole height increased with the age,and the natural pruning peak appeared at 6-7years.
引文
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[12]王春胜,赵志刚,曾冀,等.广西凭祥西南桦中幼林林木生长过程与造林密度的关系[J].林业科学研究,2013,26(2):257-262.WANG C S,ZHAO Z G,ZENG J,et al.Relationship between planting density and tree growth process of Betula alnoides mid-young plantations in Pingxiang,Guangxi[J].Forest Research,2013,26(2):257-262.(in Chinese)
[13]黄弼昌,何斌,周燕萍,等.桂西北西南桦人工林生长规律和生物生产力[J].林业科技开发,2015,29(1):123-126.HUANG B Z,H B,ZHOU Y P,et al.The growth regularity and biomass productivity of Betula alnoides plantation in northwest Guangxi[J].China Forestry Science and Technology,2015,29(1):123-126.(in Chinese)
[2]张培,郭俊杰,谌红辉,等.西南桦24个无性系的幼苗叶绿素荧光特性[J].西北林学院学报,2016,31(2):126-129.ZHANG P,GUO J J,ZEN H H,et al.Chlorophyll fluorescent characteristics of twenty-four Betula alnoides clones[J].Journal of Northwest Forestry University,2016,31(2):126-129.(in Chinese)
[3]苏付保,庞正轰,李荣珍,等.西南桦不同海拔造林试验研究[J].广东农业科学,2011(8):49-51.
[4]杨海娇,王智斌,庞岳燕,等.西南桦苗木生长对微波辐射和IBA浸种的响应[J].广西林业科学,2013,42(2):120-125.
[5]郭文福,蒙彩兰.穗条生根剂育苗基质和季节对西南桦扦插生根的影响[J].林业科学研究,2011,24(6):788-791.GUO W F,MENG C L.Effects of root-inducing regulator,propagation medium and season on rooting of Betula alnoides cuttings[J].Forest Research,2011,24(6):788-791.(in Chinese)
[6]谌红辉,曾杰,贾宏炎.西南桦叶芽离体培养再生植株技术[J].林业实用技术,2007(10):21-22.
[7]庞正轰.我国西南桦研究进展[J].广西科学院学报,2011,27(3):243-250.PANG Z H.The study progress of Betula alnoides in China[J].Journal of Guangxi Academy of Sciences,2011,27(3):243-250.(in Chinese)
[8]魏丽萍,岩香甩.用材树种西南桦研究进展[J].四川林业科技.2015,36(5):112-116.WEI L P,YAN X S.Advances in the studies of Betula alnoides[J].Journal of Sichuan Forestry Science and Technology,2015,36(5):112-116.(in Chinese)
[9]袁莲珍,史富强,许林红,等.不同种源西南桦人工林生长量研究[J].林业调查规划,2012,37(3):121-124.YUAN L Z,SHI F Q,XU L H,et al.Study on growth volume of different provenances of Betula alnoides plantation[J].Forest Inventory and Planning,2012,37(3):121-124.(in Chinese)
[10]杨建荣,王红颜,李秀君,等.西南桦苗期生长特性研究[J].西部林业科学.2016,45(4):154-157.YANG J R,WANG H Y,LI X J,et al.Growth characteristics of Betula alnoides at seedling stage[J].Journal of West China Forestry Science,2016,45(4):154-157.(in Chinese)
[11]马智德.西南桦造林密度与生长关系分析[J].农业与技术,2015,35(4):62.
[12]王春胜,赵志刚,曾冀,等.广西凭祥西南桦中幼林林木生长过程与造林密度的关系[J].林业科学研究,2013,26(2):257-262.WANG C S,ZHAO Z G,ZENG J,et al.Relationship between planting density and tree growth process of Betula alnoides mid-young plantations in Pingxiang,Guangxi[J].Forest Research,2013,26(2):257-262.(in Chinese)
[13]黄弼昌,何斌,周燕萍,等.桂西北西南桦人工林生长规律和生物生产力[J].林业科技开发,2015,29(1):123-126.HUANG B Z,H B,ZHOU Y P,et al.The growth regularity and biomass productivity of Betula alnoides plantation in northwest Guangxi[J].China Forestry Science and Technology,2015,29(1):123-126.(in Chinese)