遮荫对海姆维斯蒂栒子叶片解剖结构及生长量的影响-论文.pdf

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1、广东农业科学2014年第7期59遮荫对海姆维斯蒂枸子叶片解剖结构及生长量的影响刘峄，张婷，岳婉婷，郝欣，刘慧芹，骆建霞(天津农学院园艺系，天津300384)摘要：对海姆维斯蒂枸子进行遮荫处理，通过对叶片解剖结构、新梢生长等指标进行观察和测定，探讨其耐荫能力。结果表明：遮盖三层遮阳网(透光率8．0％)处理下的气孔密度极显著低于其他处理，其他处理间的差异不显著；各处理下的气孔大小、栅栏组织与海绵组织厚度比相互间差异不显著；全光照和一层遮荫(透光率d5．7％)处理下的叶片厚度无显著差异，但极显著高于三层遮荫、显著高于两层遮荫(透光率17．5％)处理；全光照处

2、理下新梢总生长量显著高于遮荫处理，节间长度极显著低于遮荫处理。综合各测定指标及形态观察认为，海姆维斯蒂枸子在全光照条件下生长发育良好，但也具有一定耐荫性，在一层遮荫处理(即光照为22864lx，透光率为的45．7％)的条件下也可以正常生长。关键词：海姆维斯蒂枸子；遮荫：叶片解剖结构；新梢生长中图分类号：$687．9文献标识码：A文章编号：1004—874X(2014)06-一0059一．03Influenceofshadingontheleafanatomicalstructureandgrowth~mc：rementofCotonesteri’~i‘

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6、rthanthattreatedwithlhreelayers，buthadnosignificantdirencewithonelayercovertreatmentfwith45．7％lighttransmittance)．Thenewshootgrowthincrementunderfulllightconditionwassignificantlyhigherthanthatoftheshadingtreatments，theinteruodeslengthunderfullfightconditionwasverysignificantlyl

7、owerthanshadingtreatments．Conclusionscouldbedrawnfromindexesevaluatedandtheobservationthatc．~／mqv／st／／FlinckandTurczgrewwellunderfulllightconditionandalsohadshade一．toleranceinacertaindegreeandcouldgrcwnormallyunderonelayercfshadingnetwith22864lxcflightintensityand45．7％oflighttra

8、nsmissionrate．Keywords：CotonesterhjelmqvistiiFl