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时间:2020-06-19
《凋落物对2针叶树种种子萌发和幼苗生长的影响.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12卷第4期中国水土保持科学Vo1.12No.42014年8月ScienceofSoilandWaterConservati0nAug.2O14凋落物对2针叶树种种子萌发和幼苗生长的影响石晓东,高润梅,韩有志,郭跃东,王伟欢,白林林(山西农业大学林学院,030801,山西太谷)摘要:通过研究华北落叶松云杉混交林下凋落物对2优势树种种子萌发及幼苗生长的影响表明:1)4种凋落物水浸液抑制华北落叶松和云杉种子的萌发,50.0g/L的华北落叶松和云杉针叶水浸液的抑制作用较强;2)华北落叶松针叶和白桦树皮的水浸液促进华北落叶松幼苗生长,云杉针叶水
2、浸液起抑制作用;3)白桦树皮水浸液抑制云杉幼苗生长,其他3种凋落物水浸液低质量浓度时促进云杉幼苗生长,高质量浓度抑制其生长;4)5.0和12.5g/L的白桦树皮水浸液促进华北落叶松幼苗生物量,25.0和50.0g/L时起抑制作用;5)4种水浸液均强度抑制云杉幼苗生物量;6)4种凋落物水浸液对华北落叶松和云杉种苗的影响以抑制作用为主,对云杉的作用强于华北落叶松。关键词:凋落物;水浸液;化感作用;种子;幼苗中图分类号:$754.1文献标志码:A文章编号:1672—3007(2014)04-0112.09Effectsoflitteronsee
3、dgerminationandseedlinggrowthoftwoconiferoustreespeciesShiXiaodong,GaoRunmei,HanYouzhi,GuoYuedong,WangWeihuan,BaiLinlin(ForestryCollegeofShanxiAgriculturalUniversity,030801,Taigu,Shanxi,China)Abstract:Inthispaper,effectsoflitteraqueousextractsOilseedgerminationandseedling
4、growthoftwodominanttreespecieswereinvestigatedinthemixedstandofLarixprincipis-rupprechtiiandPiceawilsonii(Piceameyeri).Theresultswereasfollows.1)Germinationoftwospecieswerebothinhibitedbvalltypesofaqueousextracts.Themostobviousinhibitionwaspresentedby50.0g/Laqueousextract
5、sof.principis—rupprechtiiorP.wilsonii(P.meyeri).2)SeedlingsofL.principis—rupprechtiiwerepromotedbyaqueousextractsofL.principis—rupprechtiineedlesorBetulaplatyphyllabarks,whiletheywereinhibitedbyaqueousextractsofP.wilsonii(Piceameyeri)needles.3)SeedlingsofP.wilsonii(Piceam
6、eyeri)wereinhibitedbyaqueousextractsofB.platyphyllabarks,whiletheywereenhancedbylowerconcentrationsandinhibitedbyhigherconcentrationsofaqueousextractsbyotherthreelittertypes.4)Biomassof.principis—rupprechtiiwasimprovedbyaqueousextractsofB.platyphyllabarksatconcentrationso
7、f5.0and12.5g/L,butnotatconcentrationsof25.0and50.0g/L.5)BiomassofP.wilsoniiwasinhibitedbyalltypesoftheaqueousextracts.6)FourtypesoflitterfallaqueousextractstotallyinhibitedseedsgerminationandseedlinggrowthofbothspeciesbuttheeffectOilP.wilsoniiwas,strongerthanthaton£.princ
8、ipis—rupprechtiiKeywords:litter;aqueousextracts;allelopathy;seed;seedling收稿日期:2013-07-23修回日期:201
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