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《油茶苗期生物量积累及营养分配规律研究.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、南方农业学报2011,42(8):964-967JournalofSouthemAgriculturehup://www..fnyxb.tom油茶苗期生物量积累及营养分配规律研究唐健1,李娜1,欧阳洁英2,曹继钊P,覃其云1(1广西林业科学研究院,南宁530003;2广西国营派阳山林场,南宁532504)摘要:【目的】了解油茶苗期不同器官的生物量积累及营养元素分布情况。【方法】对150株油茶苗期的各种生长性状指标、生物量及营养元素含量进行测定。【结果】油茶苗期各单株生物量均以地上部分占绝对优势,其中叶片生物量
2、积累最高;不同苗高分级的苗木株数及其生物量近似于正态分布,其中14.00一15.90cm的苗高分级的株数和生物量百分比最高,分别为38.67%和34.19%。在油茶根、茎、叶中均以N含量最高,其次是K和ca,cu和B含量最低;N、Mn含量以叶片最高,P、K及Cu、Zn、Fe、B含量均以根部最高。方差分析结果表明,N、K、Mg、Cu、Mn和B元素含镀在根、茎、叶中的差异达到显著水平。【结论】油茶占期叶片生物鼍积累最高,单株生物量随幼苗的生长而明显增加;不同器官对各营养元素的吸收存在显著差异,该结果可为油茶卣期施
3、肥提供参考。关键词:油茶;苗期;生物量;营养分配中图分类号:S794.4文献标识码:A文章编号:2095一1191(2011)08-0964-04MechanismofbiomassaccumulationandnutrientdistributioninCamelliaoleiferaatseedlinggrowthstageTANGJianl,LINal,OUYANGJie-yin92,CAOJi-zhaop,QINQi-yunl(1GuangxiAcademyofForestry,Nanning5300
4、03,China;2GuangxiState--ownedPaiyangshanForestryFarm,Nanning532504,China)Abstract:【Objective]ThepresentexperimentwagconductedtostudythemechanismofbiomassaccumulationanddistributionofnutrientsinCamelliaolefferaatseedlinggrowthstage.【Method]Thegrowthindicator
5、sandbiomassandnutri—entcontentsofleaf.stemandrootof150Camelliaoleffemplantsweredeterminedatseedlinggrowthstage.【Result]Theresultsshowedhigherbiomassinabovegroundplantparts,amongstwhichleaveshadthehi【ghestbiomassaccumulation.neseedlingsweregroupedintovarious
6、gradesaccordingtotheirlength,amongstthesegroups,theseedlingswithheightrangingfrom14.00-15.90cmwerehigllestinnumber(38.67%)andtheirbiomassoccupiedthehishestpercentage(34.19%).Theroot,stem。andleavesofplantwerefoundtoaccumulatehighestNcontent,foHowedbyKandCaco
7、ntents。CuandBWerethelowest.TheNandMncontentsshowedhi【ghestaccumuhtioninleaves,whileP,K,Cu,Zn,FeandBcontentsaccumulatedmoreintheroots.ThevarianceanalysisresultsindicatedsignificantdifferencesinN,K,Mg,Cu,MnandBcontentsinroot。stemandleaves.【Conclusion】111eleaf
8、ofCamelliaoleiferahadthehilshearbiomassatseedlingstageandtheplantbiomassincreasedsignificantlywiththegrowthofseedlings.Significantlydifferentuptakeandaccumulationofdif-ferentantrientelementsinroot.stem
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