摘要
短日照和低温是导致紫花苜蓿(Medicago sativa)秋眠的主要环境因子。本研究分析了降温与缩短光长对不同秋眠型紫花苜蓿品种形态特征的影响机制,并探讨其与秋眠性之间的关系。结果表明,光长缩短和降温互作处理对于苜蓿各项形态指标的影响显著(P<0.05)大于单一处理;降温和互作处理使非秋眠型与秋眠型苜蓿品种的分枝数减少;非秋眠型与秋眠型苜蓿品种分别在降温和光长缩短处理下叶片变狭长,茎秆生长较弱,匍匐生长明显,不同处理下苜蓿品种牧草产量和品质显著(P<0.05)降低,且光长缩短的影响大于降温处理。
Low temperature and short light length are the main environmental factors causing the fall dormancy of Medicago sativa.An experiment was conducted in the laboratory to determine the effect of combination of different temperature and light length on morphological traits of three varieties of M.sativa with different fall dormancy classes.The major results of this study showed that the interaction effectiveness of temperature reduction and light length reduction on morphological traits of alfalfa varieties wer...
出处
《草业科学》
CAS
CSCD
北大核心
2010年第12期113-119,共7页
Pratacultural Science
基金
公益性行业科研专项(200903060)
牧草基因资源发掘及种质创新技术研究(2008BADB3B01)
基本科研业务费专项(2009td-2
2010jc-6-2)
关键词
苜蓿
低温
短日照
秋眠性
形态特性
Medicago sativa
low temperature
short light length
fall dormancy
morphological traits
