不同苜蓿品种根颈和根系形态学特性比较及根系发育能力

Study on Root System Development Ability and Comparison of Root and Crown Traits among Alfalfa Cultivars

对15个国外引进紫花苜蓿品种的根颈和根系特性及根系发育能力进行了研究。结果表明:当年生紫花苜蓿侧根发生的主要部位在地下距地表0-30 cm的主根段,40 cm以下没有侧根发生;根系生物量、主根直径整体上表现为从土壤表层到深层递减;品种间根颈特性差异明显;通过聚类分析,可把15个紫花苜蓿品种分为3类。其中,皇冠、WL-323、苜蓿王、飞马、顶点、WL-323UF和维多利亚有较强的根系发育能力。

Study on root system development ability of 15 introduced alfalfa cultivars and their root and crown traits was conducted. The results showed that there are obvious differences among alfalfa cultivars in crown trait. First year, the secondary root of alfalfa cultivars grow mainly from the taproot underground 0-30 cm depth, there are no secondary root grow below 40 cm depth. Root system biomass, root diameter are decreased from surface layer to deep layer. According to cluster analysis on 15 alfalfa cultivars, WL-323, Emperor, WL-323UF, Victoria, Clover King, Pegasus, and Feima have good root system development ability.