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时间:2018-04-15
《施肥对落叶松二代林生长的影响》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、第29卷第2期河北林果研究Vol.29No.22014年6月HEBEIJOURNALOFFORESTRYANDORCHARDRESEARCHJun.2014文章编号:1007-4961(2014)02-0129-04DOI:10.13320/j.cnki.hjfor.2014.0028施肥对落叶松二代林生长的影响高伟航(河北省塞罕坝机械林场第三乡林场,河北围场068453)摘要:基于塞罕坝机械林场高海拔地区华北落叶松采伐迹地土壤出现的地力衰退、酸化、弱化等问题,为培育优质的二代林资源,根据土壤的立地
2、情况及所需营养元素,对有代表性的迹地更新二代幼林进行了林地施肥对比试验。在试验混合肥区中,施肥30g的林地林木树高和地径年平均生长量均高出对照99.7%、施肥50g的年平均树高及地径生长量均高出对照1倍以上,分别达到158.5%、114.4%;在控释肥区中,施肥30g的林地林木树高年平均生长量高出对照43.6%、地径年平均生长量高出对照23.9%;施肥50g的林木树高年平均生长量高出对照77.3%、地径年平均生长量高出对照36.2%。试验结果表明,华北落叶松二代林地对氮肥的需求量较大,通过施肥使林木
3、生长明显加快,可以为立地条件类似地区提供借鉴。关键词:塞罕坝;高海拔地带;落叶松;二代林;施肥;影响中图分类号:S791.22文献标志码:ATheinfluenceoffertilizationongrowthoflarchforestofsecondgenerationGAOWei-hang(DisanxiangForestryFarm,SaihanbaMachinizedForestryCenterofHebei,Weichang068453,China)Abstract:Basedonthed
4、eclineofsoilfertility,soilacidification,andweakeningofcut-overareahigh-altitudeLarixprincipis-rupprechtiiforestinSihanbaMechanizedForestryCentre(SMFC)andotherissues,tocultivatehighqualitythesecondgenerationofforestresources,afertilizingcontrasttestofwo
5、odlandwasconductedaccordingtothesituationofsoilsiteandtherequirednutrientsforrepresentativemarkplacetoupdatethesecondgenerationyoungdesign.Theresultshowedthattheaverageannualgrowthoftreehighinthemixedfertilizingareaby30gwas99.7%higherthanCK,withthegrou
6、nddiameterannualgrowthof99.7%higherthanCK,whiletheaveragehighanddiameterwith50gtreatmentincreasedbyoveronetimecomparedwithCKreaching158.5%and114.4%,respectively.Inthecon-trolledreleasingfertilizertreesitebyfertilization30gtheaverageannualgrowthoftreehi
7、ghandgrounddiameterwas43.6%and23.9%,whilethatin50gtreatmentwas77.3%and36.2%.Additionaly,thesecond-generationforestlandofLarixprincipis-rupprechtiihigh-lydemandedfornitrogen.Throughscientificfertilizationtreeswillgrowfaster,greatlyim-provingitsyield,qua
8、lityandresistance,andprovidinganewroadtoexploresiteconditionsandreferencesforsimilarareastocultivatehighqualitytimberforest.Keywords:Saihanba;highelevationland;larch;twogenerationforests;soilfertilityde-cline;effect收稿日期:2013-09-03;修改稿收期
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