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SCI论文目录 |
青藏高原5种牧草木质素含量及其体外消化率研究 |
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出 版 社:西北植物学报23(9):1605-1608 |
发表时间:2003 |
台 站:
海北高寒草甸生态系统定位研究站
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作 者:徐世晓 赵新全 孙平 赵同标 赵伟 |
点 击 率:5451 |
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关 键 字:关键词:青藏高原;羊茅;早熟禾;艹洽草;矮嵩草;黑褐苔草;木质素;体外消化率 |
摘 要:摘 要:在海拔高度3200m的中国科学院海北高寒草甸生态系统定位站选取羊茅 Festucaovina 、早熟禾 Poaannua 、艹洽草 Koeoeriacristata 以及莎草科的矮嵩草 Kobresiahumilis 、黑褐苔草 Carexalrofusca 5种青藏高原重要牧草品种,分别测定羊茅、早熟禾、艹洽草、矮嵩草茎、矮嵩草叶、黑褐苔草茎和黑褐苔草叶的木质素含量,并采用二级离体培养法测定其体外消化率,比较不同牧草间木质素含量及消化率差异.1999和2000年两年的实验结果表明,牧草木质素含量与其体外消化率之间为极显著负相关 P<0.01 ;就同种牧草不同器官而言,牧草茎的木质素含量明显高于叶,其降解率较低;3种禾本科牧草及2种莎草科牧草不同牧草品种间木质素含量和体外消化率差异不显著. |
关 键 字(英文):Keywords:TibetanPlateau;Festucaovina Poaannua Koeoeriacristata Kobresiahumilis Carexalrofusca aciddetergentlignin;digestibility |
摘 要(英文):Abstract:FivespeciesofpreponderantherbageinTibetanPlateauwaschoosedsuchasFestucaovina,Poaannua,Koeoeriacristata,Kobresiahumilis,CarexalrofuscaatHaibeiAplineMeadowEcosystemResearchstationofChineseacademyofScience,inwhichaltitudeis3200m,andthenmeasuredtheaciddetergentlignincontentanditsinvitrodigestibilityofFestucaovina,Poaannua,Koeoeriacristata,stemofKobresiahumilis,leafofKobresiahumilis,stemofCarexalrofusca,leafofCarexalrofuscarespectively.Comparedaciddetergentlignincontentandinvitrodigestibilityofleafwiththoseofstem,analyzedcorrelativitybe-tweemaciddetergentlignincontentandinvitrodigestibilityamong5speciesofherbage.Getfollowingre-sultsthrough2yearsexperiment:anegativecorrelativityexistbetweenherbageaciddetergentlignincon-tentanditsinvitrodigestibility P<0.01 ;theaciddetergentlignincontentsofstemgreaterthanthatofleafobviouslyanditsinvitrodigestibilitylowerthanthatofleaf;therenoevidentdifferenceamong5dif-ferentspeciesofherbageonaciddetergentligninanditsinvitrodigestibility. |
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