24种白三叶种质材料在长沙的适应性研究

本文对来自不同地区的24种白三叶种质材料进行对比研究，调查不同种质材料在长沙2013年夏季旱灾后的恢复情况和2014年“倒春寒”后各种质材料的存活及返青情况。结果表明，植株高度和匍匐茎长短与白三叶耐旱情况成正比，而干旱后返青速度越快的白三叶材料，遇到寒冷时死亡速度越慢。同时从中选出了三类适合于华中地区种植的材料类型，第一类为既耐旱又耐寒的02485和海发，第二类为较耐旱不耐寒，但返青速度快的02478、00858、CF022549和00605，第三类为不耐旱但耐寒、返青速度快的百事吉、和谐、贵州大方和02587。

Study of the Adaptability of 24 White Colovers Varieties in Changsha

In this thesis, 24 kinds of white clover germplasm were comparative studied by investigating the survival after the drought in the summer in 2013 and the revival and recovery after the late spring coldness in 2014 in Changsha. The results showed that the plant height and stolon length of the white clover was proportional to the drought situation. For 80% of white clover material, the recovery speed after drought was proportional to the death speed after coldness. Meanwhile, three types of material suitable for planting in the central region were selected. The first type is both cold and drought tolerant, such as 02485 and Haifa. The second type is drought-resistant, not hardy, but fast reviving, such as 02478,00858, CF022549 and 00605. The third type is hardy but not drought-resistant, fast reviving, Baishiji, Hexie, Guizhou dafang and 02587.