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1、南方農(nóng)業(yè)學(xué)報(bào)2011,42(8):964-967JournalofSouthemAgriculturehup://www..fnyxb.tom油茶苗期生物量積累及營(yíng)養(yǎng)分配規(guī)律研究唐健1,李娜1,歐陽(yáng)潔英2,曹繼釗P(yáng),覃其云1(1廣西林業(yè)科學(xué)研究院,南寧530003;2廣西國(guó)營(yíng)派陽(yáng)山林場(chǎng),南寧532504)摘要:【目的】了解油茶苗期不同器官的生物量積累及營(yíng)養(yǎng)元素分布情況?!痉椒ā繉?duì)150株油茶苗期的各種生長(zhǎng)性狀指標(biāo)、生物量及營(yíng)養(yǎng)元素含量進(jìn)行測(cè)定?!窘Y(jié)果】油茶苗期各單株生物量均以地上部分占絕對(duì)優(yōu)勢(shì),其中葉片生物量
2、積累最高;不同苗高分級(jí)的苗木株數(shù)及其生物量近似于正態(tài)分布,其中14.00一15.90cm的苗高分級(jí)的株數(shù)和生物量百分比最高,分別為38.67%和34.19%。在油茶根、莖、葉中均以N含量最高,其次是K和ca,cu和B含量最低;N、Mn含量以葉片最高,P、K及Cu、Zn、Fe、B含量均以根部最高。方差分析結(jié)果表明,N、K、Mg、Cu、Mn和B元素含鍍?cè)诟?、莖、葉中的差異達(dá)到顯著水平。【結(jié)論】油茶占期葉片生物鼉積累最高,單株生物量隨幼苗的生長(zhǎng)而明顯增加;不同器官對(duì)各營(yíng)養(yǎng)元素的吸收存在顯著差異,該結(jié)果可為油茶卣期施
3、肥提供參考。關(guān)鍵詞:油茶;苗期;生物量;營(yíng)養(yǎng)分配中圖分類號(hào):S794.4文獻(xiàn)標(biāo)識(shí)碼:A文章編號(hào):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,F(xiàn)eandBcontentsaccumulatedmoreintheroots.ThevarianceanalysisresultsindicatedsignificantdifferencesinN,K,Mg,Cu,MnandBcontentsinroot。stemandleaves.【Conclusion】111eleaf
8、ofCamelliaoleiferahadthehilshearbiomassatseedlingstageandtheplantbiomassincreasedsignificantlywiththegrowthofseedlings.Significantlydifferentuptakeandaccumulationofdif-ferentantrientelementsinroot.stem