摘要
为了综合评价青藏高原区老芒麦资源的特点,本研究在海晏县开展了8份老芒麦资源的农艺性状与生产性能综合评价试验,分析了不同老芒麦资源的农艺性状和产量性状特征,揭示老芒麦饲草产量的影响因素,采用TOPSIS-多准则决策模型对供试老芒麦资源的各项指标进行综合评价,以期筛选出优质的老芒麦资源。结果表明:2龄时,16-364、17-195植株较高,为108.1和109.0 cm;16-093草层高度最高、单株饲草产量最高,分别为36.8 cm,170.3 g;15-025、17-195分蘖数较多,为123和124枝·株^(-1)。3龄时,17-195植株最高、冠幅最大,分别为122.7 cm、140.8 cm;16-093草层高度最高、单株饲草产量最高,分别为51.8 cm,234.7 g;15-025分蘖数最多,为456枝·株^(-1)。结构方程表明,株高和分蘖数是影响老芒麦饲草产量的关键因子,TOPSIS-多准则决策模型综合评价结果表明,16-093饲草生产性能更高、更稳定,是适宜海北州种植的最佳老芒麦资源,可作为下一步品种选育的亲本材料。
The aim of this research was to comprehensively evaluate the performance of Elymus sibiricus varieties in the Qinghai-Tibet Plateau.The work was conducted in Haiyan County of Qinghai Province,and analyzed the agronomic traits and forage yield characteristics of eight E.sibiricus varieties,using a TOPSIS model to identify superior varieties.In year two,varieties designated 16-364 and 17-195 had greater plant height than other varieties(108.1 and 109.0 cm,respectively),while variety 16-093 had the highest grass height among the tested varieties(36.8 cm)and the greatest forage yield per plant(dry weight)(170.3 g).Varieties 15-025 and 17-195 had the highest tiller numbers(123 and 124 tillers of per plant,respectively).In year 3,variety 17-195 had the greatest plant height and crown breadth(122.7 cm and 140.8 cm,respectively),while variety 16-093 had the greatest grass height and forage yield per plant(51.8 cm and 234.7 g,respectively).Variety 15-025 had the highest tiller numbers(456 tillers per plant).A structural equation model showed that plant height and tiller numbers were key factors affecting E.sibiricus forage yield.The TOPSIS model multivariate evaluation showed that the variety 16-093 ranked highest for forage productivity and stability,making it a suitable variety for cultivation in the study region.Therefore,variety 16-093 could be used as parent material for new variety breeding as a next step.
作者
王文虎
梁国玲
刘文辉
王凤宇
李文
WANG Wen-hu;LIANG Guo-ing;LIU Wen-hui;WANG Feng-yu;LI Wen(Academy of Animal and Veterinary Sciences,Qinghai University,Qinghai Academy of Animal and Veterinary Sciences,Xining 810016,China;Laboratory for Research and Utilization of Qinghai Tibet Plateau Germplasm Resources,Xining 810016,China)
出处
《草业学报》
北大核心
2025年第2期123-132,共10页
Acta Prataculturae Sinica
基金
披碱草属重要牧草适应高寒环境的分子生态学机制U20A2050
青藏高原种质资源研究与利用实验室(2024)资助。
关键词
老芒麦
生产性能
资源
饲草
综合评价
Elymus sibiricus
production performance
varieties
forage
comprehensive evaluation
