第43卷第7期高师理科学刊Vol.43No.72023年7月JournalofScienceofTeachers′CollegeandUniversityJul.2023文章编号:1007-9831(2023)07-0059-07采收期对紫花苜蓿生长和营养特性的影响杨镇才1,2,张宇1,2,李珊珊1,2,李波1,2,董静1,2(齐齐哈尔大学1.生命科学与农林学院,2.抗性基因工程与寒地生物多样性保护黑龙江省重点实验室,黑龙江齐齐哈尔161006)摘要:以紫花苜蓿“龙牧801”植株为实验材料,对采集的5~9月份植株进行生长指标、营养成分测定和变化规律分析,并利用隶属函数法对各指标变化进行综合评价.结果表明,随着苜蓿植株生长周期的延长,苜蓿生长指标中的株高逐渐增加,鲜质量和干质量呈现先增加后降低的变化趋势,鲜干比逐渐降低;不同采收期苜蓿的粗纤维、粗蛋白、粗脂肪、粗灰分含量随着苜蓿采收月份的增加呈现先增加后降低的变化趋势,磷和钾含量呈现降低的变化趋势.应用隶属函数法对10项指标变化进行综合评价,隶属函数值大小为7月份>8月份>6月份>5月份>9月份,7月份苜蓿生长和营养指标的隶属函数值最高,为苜蓿刈割进行青贮的最适时期.关键词:紫花苜蓿;采收期;生长指标;营养特性中图分类号:Q94文献标识码:Adoi:10.3969/j.issn.1007-9831.2023.07.012InfluenceofgrowthandnutrientcharacteristicsofalfalfainharvestperiodsYANGZhencai1,2,ZHANGYu1,2,LIShanshan1,2,LIBo1,2,DONGJing1,2(1.SchoolofLifeSciences,AgricultureandForestry,2.HeilongjiangProvincialKeyLaboratoryofResistanceGeneEngineeringandProtectionofBiodiversityinColdAreas,QiqiharUniversity,Qiqihar161006,China)Abstract:Thealfalfa“Longmu801”plantwasusedasthetestmaterial.ThegrowthindexandnutrientcompositionofthecollectedplantsweremeasuredandanalyzedfromMaytoSeptember.Usethemembershipfunctionmethodtocomprehensivelyevaluatethechangesofvariousindicators.Theresultsshowedthatwiththeextensionofthegrowthcycleofalfalfaplants,theplantheightinthegrowthindicatorsofalfalfagraduallyincreased,thefreshweightanddryweightfirstincreasedandthendecreased,andthefreshtodryratiograduallydecreased.Thecontentofcrudefiber,crudeprotein,crudefatand,crudeashofalfalfaindifferentharvestperiodsincreasedfirstandthendecreasedwiththeincreaseofharvestmonths,whilethecontento...