南京林业大学学报(自然科学版) ›› 2000, Vol. 24 ›› Issue (01): 17-22.doi: 10.3969/j.jssn.1000-2006.2000.01.005

• 研究论文 • 上一篇    下一篇

毛白杨幼林灌溉效应及其特点分析

王文全;贾玉彬;李惠卓;张振江;王容;高增民   

  1. 河北农业大学;保定071000;河北农业大学;保定071000;河北农业大学;保定071000;河北大名县林业局;河北大名县林业局;河北大名县林业局
  • 出版日期:2000-02-18 发布日期:2000-02-18

TheAnalysisoftheIrrigationEffectanditsCharacterinYoung PlantationofPopulustomentosa

WangWenquan JiaYubin LiHuizhuo ZhangZhenjiang WangRong GaoZengmin (HebeiAgriculturalUniversity Baoding 0 710 0 0 )   

  1. HebeiDamingCountyForestryBureau
  • Online:2000-02-18 Published:2000-02-18

摘要: <正>根据连续 8a毛白杨幼林灌溉的技术资料 ,系统地分析了灌溉效应及其特点。结果表明 :灌溉可使毛白杨叶片叶绿素和营养元素含量及其光合作用潜能提高 ,并可维持较高的生长活力、激发休眠芽萌发、促进叶片生长、加快树体增粗和枝条延长 ;灌溉对林木生长的促进作用有多面性、相异性、可变性和后效性 ;灌溉效应可分为生理效应、生长效应、再生长效应和后期效应 ,光合叶面积的复式增长为其作用核心 ;灌溉期间随土壤水分阈值提高灌溉效应增加 ,而停止灌溉后以阈值中等水平的处理后期效应最好。在干旱的 4~ 6月灌溉可使光合叶面积增加 3~ 4倍以上 ,可使胸径和树高净生长量分别提高 30 %和 40 %以上 ;停止灌溉后的 4a内 ,阈值为 50 %试验处理的材积生长量平均较对照增加了 39 67%。

Abstract: Accordingtotheanalysisof8 yearsuccessivedataofirrigationonPopulustomentosaplantation ,itsef fectandcharacterwerestudiedsystematiclly.Theresultsshowthattheleaf’scontentsofchlorophyllandnutrition elementsandthepotentialofphotosynthesiswereincreasedsignificantlybyirrigating,andthetreemaintainedthe highervitalityforgrowth ,whiletheystimulatedthedormancybuds,expandedtheareaofleaf,andincreasedthethick ofthetreetruckandthelengthofitsbranchesaswell.Thecomprehensiveness,differentials ,changeableandcontinu alreactioninlaterstagewerethecharactersoftreesresponsetoirrigation.theeffectsoftreeforirrigationincluded physiologicalreaction ,growth ,reproductionandlaterstagereproduction ,andthekeyforitwastheincreasedfoliage continually .Duringtheirrigationgperiod ,theeffectofirrigationincreasedasthesoilmoistureirrigationthreshold wasraised .Butwithoutirrigationoflateryears,themiddlesoilmoisturethresholdtreatmentwasthebesttotree growth .Duringthedryseason(ApriltoJune) ,theirrigationcouldincreasethetotalfoliageareamorethan 3to 4 times,andthenetgrowthofD .B .H .andheightoftreemorethan 30 %and40 %respectively.Inthelater4-years withoutirrigation ,thevolumeofthetreewasraisedby 39.67%inaverage ,thatirrigatedwith 50 %offieldcapacity asthesoilmoisturethresholdinearly 4 -years.

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