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时间:2020-05-19
《圣音竹发笋及幼竹高生长规律研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第35卷第8期中南林业科技大学学报、,_01.35No.82015年8月JournalofCentralSouthUniversityofForestry&TechnologyAug.2015Doi:10.14067~.cnki.1673-923x.2015.08.006http://qks.csuft.edu.cn圣音竹发笋及幼竹高生长规律研究唐红,刘玮,黄滔,蒋利媛,黄程前,黄文韬(湖南省森林植物园,湖南长沙410116)摘要:对湖南省森林植物园的圣音竹出笋、退笋及幼竹高生长规律进行了研究。结果表明:圣音竹发笋期在3月中旬至4月中旬,历期30d,明显分为初期、盛期和末
2、期3个阶段;2014年总发笋53支,3个发笋时期的发笋数间存在极显著性差异(P<0.01);退笋率为15.09%,在发笋初期和盛期的萌发笋退笋原因主要是人为机械损伤,发笋末期萌发笋的退笋原因是营养供应不足;发笋初期、盛期和末期的萌发笋竹笋一幼竹高生长过程均呈“S”型生长曲线,符合“慢一快一慢”生长规律,相应的Logistic方程都很好的拟合了各个时期萌发笋幼竹的平均高生长数据,发笋初期和盛期萌发笋在幼竹高生长历期和株高方面均优于发笋末期萌发笋,留笋养竹时选择初期和盛期的萌发笋为宜;发笋盛期的圣音竹竹笋在生长快速期时,昼夜生长呈现一定节律,且昼夜总平均生长量达16.48cm
3、,白天生长量是夜间生长量的1.2l倍。关键词:圣音竹;发笋;退笋;幼竹高生长;Logistic方程中图分类号:$795.9文献标志码:A文章编号:1673.923X(2015)08.0027—05StudyonshootingandyoungbambooheightgrowthofPhyllostachysheterocyclainHunanForestBotanicalGardenTANGHong,LIUWei,HUANGTao,JIANGLi—yuan,HUANGChen—qian,HUANGWen—tao(HunanForestBotanicalGarden,Cha
4、ngsha410004,Hunan,China)Abstract:Theshooting,shootdegradationandtheregularityofyoungbambooheight—growthofPllostachysheterocyclawerestudiedinHunnanForestBotanicalGarden.Theresultsindicatethattheshootingtimewasfi~ommid—Marchtomid—April,whichlastingabout30days,andtheshootingperiodcanbedivide
5、dintothreephases,includinginitialphase,abundantphaseandfinalphase;thetotalshootingnumberwas53andtheshootingnumbersweresignificantdiferentamongthreephases6、inreasonwhytheshootsdegradationinfinalphase;theheightgrowthcurvesofyoungbambooemergedininitial,abundantandfinalphaseswere“S-shaped”,whichexhibitedatendencyof“slow—fast—slow”,andthreelogisticequationsofheightgrowthrespectivelyfiredwiththeirmeanheightgrowthdata;theshootswerebeRerforshootske7、epingininitialandabundantphasesthanthatinfinalphase;duringthehighgrowthperiod,theheightgrowthatadayamountedto16.48em,whilethedaytimeheightgrowthwas1.21timeshigherthanthatinthenight.Keywords:只llostachysheterocyclacv.tubaeformisS.YWang;shooting;shootdegradation;youngb
6、inreasonwhytheshootsdegradationinfinalphase;theheightgrowthcurvesofyoungbambooemergedininitial,abundantandfinalphaseswere“S-shaped”,whichexhibitedatendencyof“slow—fast—slow”,andthreelogisticequationsofheightgrowthrespectivelyfiredwiththeirmeanheightgrowthdata;theshootswerebeRerforshootske
7、epingininitialandabundantphasesthanthatinfinalphase;duringthehighgrowthperiod,theheightgrowthatadayamountedto16.48em,whilethedaytimeheightgrowthwas1.21timeshigherthanthatinthenight.Keywords:只llostachysheterocyclacv.tubaeformisS.YWang;shooting;shootdegradation;youngb
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