简介:为了使基于人工模拟降雨装置的水土保持试验更可靠,采用人工降雨试验方法,通过研究QYJY-503C人工模拟降雨装置的降雨特性,探讨该装置在水土保持科学试验中的适用性。结果表明:1)雨滴达到终速时雨滴-色斑直径的关系为d=0.3839D0.709;2)QYJY-503C人工模拟降雨装置有效降雨均匀度超过80%;3)在试验范围内,雨滴直径随降雨强度增大而增大,雨滴中数直径与降雨强度呈d50=0.5595I0.2805的幂函数关系,相同降雨强度条件下的雨滴直径较天然雨滴偏小20%~70%;4)降雨动能与降雨强度呈E=0.0042I-0.021的线性关系,可通过控制降雨强度实现降雨动能与天然降雨的相似性;5)QYJY-503C人工模拟降雨装置性能稳定、可控性强,可适用于室内土壤侵蚀的研究。
简介:Thepromoterregionofadroughtandabscisicacid(ABA)induciblegene,osr40c1,wasisolatedfromasalt-tolerantindicaricevarietyPokkali,whichis670bpupstreamoftheputativetranslationstartcodon.Insilicopromoteranalysisofresultedsequenceshowedthatatleast15typesofputativemotifsweredistributedwithinthesequence,includingtwotypesofcommonpromoterelements,TATAandCAATboxes.Additionally,severalputativecis-acingregulatoryelementswhichmaybeinvolvedinregulationofosr40c1expressionunderdifferentconditionswerefoundinthe5′-upstreamregionofosr40c1.TheseareABA-responsiveelement,light-responsiveelements(ATCT-motif,BoxI,G-box,GT1-motif,Gap-boxandSp1),myeloblastosisoncogeneresponseelement(CCAAT-box),auxinresponsiveelement(TGA-element),gibberellin-responsiveelement(GARE-motif)andfungal-elicitorresponsiveelements(BoxEandBox-W1).Aputativeregulatoryelement,requiredforendosperm-specificpatternofgeneexpressiondesignatedasSkn-1motif,wasalsodetectedinthePokkaliosr40c1promoterregion.Inconclusion,thebioinformaticanalysisofosr40c1promoterregionisolatedfromindicaricevarietyPokkaliledtotheidentificationofseveralimportantstress-responsivecisactingregulatoryelements,andtherefore,theisolatedpromotersequencecouldbeemployedinricegenetictransformationtomediateexpressionofabioticstressinducedgenes.
简介:以便揭示在二CCDD染色体种,Oryzaalta和Oryzalatifolia之间的起源和进化关系,在situ杂交(鱼)的荧光被采用从O与C0t-1DNA分析二种的染色体。alta作为一根探针。Karyotype比较地也在O之间被分析。alta和O。latifolia基于他们杂交的类似的乐队模式发信号。在O之间有高相同和靠近的关系。alta和O。然而,在杂交之间的区别表明的latifolia也是清楚的。C0t-1DNA被证明是种类--并且染色体类型特定。C0t-1DNA鱼能是更有效的分析在不同种类之间的genomic关系,这被建议。根据在二allotetraploidy种之间的高度并且中等重复的DNA序列的比较分析,O。alta和O。latifolia,可能的起源和Oryza的allotetraploidy的进化机制被讨论。
简介:Thechloroformfumigation-incubationmethowasusedtomeasurthesoilmicrobialbiomassC(SMBC)andN(SMBN)in16loessialsoilssampledfromAnsai,YongshouandYanglinginShaanxiProvince.TheSMBContentsinthesoilsrangedfrom75.9to301.0μgCg^-1withanaverageof206.μgCg^-1,accountingfor1.36%-6.24%ofthetotalsoilorganicCwithanaverageof3.07%,andtheSMBNcontentsfrom0.51to68.40μgNg^-1withanaverageof29.4μgNg^-1,accountingfor0.20%-5.65%ofthetotalNinthesoilswithanaverageof3.36%.AcloserelationshipwasfoundbetweenSMBCandSMBN,andtheybothwerepositivelycorrelatedwithtotalorganicC,totalN,NaOHhydrolizableNandmineralizableN.Theseresultsconfirmedthasoilmicrobialbiomasshadacomparativeroleinnutrientcyclesofsoils.
简介:本研究以二倍体马铃薯C为母本,E为父本的杂交F1群体共90个株系,构建了一张包含12个连锁群和78个SSR标记,总长度1141.99cM,标记间平均距离14.64cM的遗传图谱。结合2015年和2016年鉴定的与块茎建成相关性状表型数据,采用QTLIciMappingV4.1软件的完备区间作图法(ICIM)进行QTL定位和效应估计。共检测14个与株高、根长、匍匐茎长、匍匐茎数、微型薯数相关QTL。表型变异解释率为3.05%~19.19%。有5个QTL在2个环境中被重复检测到,其中在5号染色体上有2个(qTN5-1,qTN5-2)与微型薯相关的QTL,遗传贡献率为9.64%和9.67%。在9号染色上有3个(qSL9-1,qSL9-2,qSL9-3)与匍匐茎长相关的QTL,遗传贡献率为3.05%~14.17%。
简介:为探究杭州西湖景区园林绿化废弃物粉碎后直接进行堆肥处置的可行性,设置不同C/N(T125:1、T215:1、T310:1、CK32:1)处理的试验,并且对堆肥过程的几个重要指标变化情况进行分析。结果表明:园林绿化废弃物不同C/N堆肥试验中,T1堆肥过程中堆体能达到71.6℃高温,且堆体连续超高55℃的天数为10天,是所有处理中温度最高持续时间最长的;T1堆肥腐熟后堆体pH值为弱碱性,其余处理为弱酸性,仅有CK和T1处理EC值符合作为绿化种植土使用的国家城镇建设行业标准;T1处理C/N降低幅度最大,达到完全腐熟要求。调控合适的C/N(25:1)有利于堆体温度升高,延长高温持续时间,促使堆体pH值的升高,同时增加腐熟后堆体中有机物质矿化速率,提高堆肥矿质养分含量,利于微生物在堆体内的快速繁殖加快堆肥腐熟,缩短堆肥周期。
简介:从纯carrageenans获得的Oligo-carrageenans(OC)从海洋的红水藻提取了由在烟草植物和桉树类树提高光合作用和基础新陈代谢刺激生长。另外,OC刺激第二等的新陈代谢,增加涉及对病原体的防卫的代谢物的水平。在这个工作,我们在高度的增加以后分析了OCkappa的效果,在涉及碳,氮和硫吸收的基础新陈代谢酶的活动,ribulose1,5biphosphatecarboxylase/oxygenase(rubisco),glutamate脱氢酶(GDH)和O-acetylserinethiol-lyase(OASTL),并且在支持生长的荷尔蒙,植物生长素吲哚醋酸(IAA)和在松(Pinusradiata)的赤霉素GA3,的水平,树在1和5的集中与OC对待kappa?mg?mL在1点与OCkappa对待的松?mg?mL1在高度显示出类似的增加,但是显示一更高比在5点与OCkappa对待的那些在IAA和GA3的全部的叶绿素,rubisco的活动,GDH和OASTL和水平增加了?mg?mL1。因此,OCkappa刺激生长和基础新陈代谢并且在松树上增加支持生长的荷尔蒙的水平,主要在1点?mg?mL1。
简介:桑白皮具有降血压、利尿利泻、杀菌消炎、止咳、抗浮肿、镇静抗惊厥的作用,中医主治肺热喘咳吐血、水肿、脚气,小便不利、糖尿病、传染性肝炎、产后出血不止,具有很好的药用价值。桑根酮C具有明显的降血压作用。通过提取桑白皮中的有效成分桑根酮C,对提取出来的浸膏得率为10.6%,先后用丙酮,苯,乙醚萃取,得率分别为:62.7%、45%、20%。然后将乙醚萃取后的初产品过聚酰胺层析柱,得到比较纯的桑根酮C的初产品,将桑根酮C粉末与FeCl3,乙醇溶液反应显紫红色,测得桑根酮C的红外吸收光谱图,显示有羟基(3369cm^-1),共轭羰基(1629cm^-1),环氧键(1261cm^-1,796.5cm^-1),双键(1680~1620cm^-1)等特征吸收峰。测得桑根酮C的紫外吸收光谱图显示在220nm,230nm,280nm,310nm有最大吸收,说明有共轭体系,其中283~288nm的紫外吸收验证分子中有共轭羰基,分子中有苯环。测得的官能团结构与桑根酮C的结构式基本一致。
简介:Fivehumicfractionswereobtainedfromauniformly^15N-labelledsoilbyextractionwith0.1molL^-1Na4P2O7,0.1molL^-1NaOH,andHF/HCl-0.1molL^-1NaOH,consecutively,andanalyzedby^13Cand^15NCPMASNMR(crosspolarizationandmagicanglespinningnuclearmagneticresonace).Comparedwiththoseofnativesoilshumicfractionsstudiedasawholecontainedmorealkyls,methoxylsandO-alkyls,being27%-36%,17%-21%and36%-40%,respectively,butfeweraromaticsandcarboxyls(bein14%-20%and13%-90%,respectively),Amongthosehumicfractions,thehumicacid(HA)andfulvicacid(FA)extractedby0.1molL^-1Na4P2O7containedslightlymorecarboxylsthancorrespondinghumicfractionsextractedby0.1molL^-1NaOH,andtheHAextactedby0.1molL^-1NaOHaftertreatmentwithHF/HClcontainedtheleastaromaticsandcarboxyls.Thedistributionofnitrogenfunctionalgroupsofsoilhumicfractionsstudiedwasquitesimilartoeachotherandalsoquitesimilartothatofhumicfractionfromnativesoils.Morethan75%oftotalNineachfractionwasinamidefrom,with9%-13%presentasaromaticand/oraliphaticaminesandtheremainderasheerocyclicN.
简介:Theannualseriesofδ13CweremeasuredintreeringsofthreeCryptomeriafortuneidisks(CF-1,CF-2,andCF-3)collectedfromWestTianmuMountain,ZhejiangProvince,China,accordingtocross-datingtreeringages.Therewasnoobviousdecreasingtrendoftheδ13CannualtimeseriesofCF-2before1835.However,from1835to1982thethreetreeringδ13Cannualseriesexhibitedsimilardecreasingtrendsthatweresignificantly(P≤0.001)correlated.Thedistributioncharacteristicsofascatterdiagrambetweenestimatedδ13CseriesofCF-2frommodelingandtheatmosphericCO2concentrationextractedfromtheLawDomeicecorefrom1840to1978wereanalyzedandacurvilinearregressionequationforreconstructingatmosphericCO2concentrationwasestablishedwithR2=0.98.Also,atestofindependentsamplesindicatedthatbetween1685and1839thereconstructedatmosphericCO2concentrationusingtheδ13CseriesofCF-2hadacloserelationshipwiththeLawDomeandSipleicecores,withastandarddeviationof1.98.ThegeneralincreasingtrendofthereconstructedatmosphericCO2concentrationcloselyreflectedthelong-termvariationofatmosphericCO2concentrationrecordedbothbeforeandaftertheIndustrialRevolution.Between1685and1840theevaluatedatmosphericCO2concentrationwasstable,butafter1840itexhibitedarapidincrease.Givenalongerδ13Cannualtimeseriesoftreerings,itwasfeasibletorebuildarepresentativetimeseriestodescribetheatmosphericCO2concentrationforanearlierperiodandforyearsthatwerenotintheicecorerecord.