冷地型鸭茅不同品种生产性能的研究

A Comparative Test on the Productivity of Cool-season Dactylis glomerata L.Cultivars

对日本引入的 1 2个冷地型禾草品种 (其中 9个鸭茅品种 ,3个参考品种 )的生产性能进行了研究 ,其结果表明 ,9个鸭茅品种都能适应当地的环境条件 ,且生产发育良好。 4月初返青 ,5月下旬抽穗 ,除干草王Ⅱ之外 ,返青后 6周左右即可进行第一次刈割。其干物质产量由高到低依次为 :干草王、秋绿、Potomac、早生绿、先进、夏绿、风绿、北斗和干草王Ⅱ。三年的干物质产量为 1 4 895～ 2 0 5 1 4kg/hm2 ,干草王Ⅱ的干物质产量显著低于其它品种(P <0 0 5 )。再生草产量占总产量的 6 2 2 5 %～ 72 80 %。

The producti Vity of 12 cultivars of cool-season grasses from Japan,including 9 cultivars of orchard grass(Dactylis glonerata L.),2 cultivars of tall tescue and 1 that 9 cultivars of orchard grass were adapatable for the local conditions and circumstances and grew well.They furned green in the early April,headed in the late May,they were first cut about 6 weeks after turning green except for Hayking Ⅱ.Forage dry-matter yields in descending order were:Hayking,Akimidori,Potomac,Wase-midori,Froutier,Natsu-midori,Oka-midori,Hokuto and Hayking Ⅱ.3-year DM yields ranged form 14895 kg/hm 2 for Hayking Ⅱ to 20514kg/hm 2 for Hayking.DM yield of Hayking Ⅱwas significantly lower than that of the other cultivars (p<0.05).DM yields of their regrowths made up 65 25%～72 80% of the total.