DOI:10.11829/j.issn.1001-0629.2022-0014王欣铭，邹博坤，钱永强.光暗周期对野牛草生长及生理影响.草业科学,2023,40(1):152-161.WANGXM,ZOUBK,QIANYQ.EffectsofdifferentphotoperiodsonthegrowthandphysiologyofBuchloedatyloides.PrataculturalScience,2023,40(1):152-161.光暗周期对野牛草生长及生理影响王欣铭，邹博坤，钱永强（中国林业科学研究院生态保护与修复研究所/国家林业和草原局草原研究中心,北京100091）摘要：为了探索野牛草(Buchloedatyloides)生长最适光周期，本研究选取两个野牛草品种‘Sundancer’和‘Texoka’，设置3个不同光周期处理，光照/黑暗分别为12h/12h、16h/8h、22h/2h。对株高、地上生物量、匍匐茎数量、叶茎形态学及生理指标测定分析，结果表明：1)光照时间的延长对野牛草株高、地上生物量积累和匍匐茎数量均有促进作用，且在光照/黑暗为22h/2h处理下促进效果最明显。2)形态学上，光照/黑暗为22h/2h处理下叶片较宽且维管束密度大，茎杆叶鞘较其他处理更为紧密。3)延长光照时间有利于野牛草可溶性糖和淀粉等光合产物的积累，三者在光照/黑暗为22h/2h处理下积累量显著高于其他处理(P<0.05)。根据上述结果并结合隶属函数法综合分析，结果表明，光照/黑暗为22h/2h处理更有利于野牛草的营养生长。研究结果对于阐明野牛草对光周期的反应机理、加速新品种培育提供理论参考。关键词：野牛草；光周期；营养生长；生长特性；解剖结构；匍匐茎；生理代谢文献标志码：A文章编号：1001-0629(2023)01-0152-10EffectsofdifferentphotoperiodsonthegrowthandphysiologyofBuchloedatyloidesWANGXinming,ZOUBokun,QIANYongqiang(InstituteofEcologicalProtectionandRestoration,ChineseAcademyofForestry/GrasslandResearchCenter,NationalForestryandGrasslandAdministration,Beijing100091,China)Abstract:Toexploreasuitablephotoperiodforrapidvegetativegrowthofbuffalograss(Buchloedatyloides),growth,morphology,andphysiologicalindexesoftwocultivarsofbuffalograss(SundancerandTexoka)underdifferentphotoperiodtreatments[light/dark(L/D)were12h/12h,16h/8h,and22h/2h]weredeterminedandanalyzed.Theresultswereasfollows:1)Theextensionoflightdurationpromotedtheplantheight,biomassaccumulation,andnumberofstolonsofbuffalograss,theeffectsbeingmostobviousunderL/D(22h/2h)treatment.2)Theleaveswerewider,theden...
