杂交狼尾草种茎越冬繁殖技术研究

目的]探讨杂交狼尾草的越冬保存及越冬方式对生长发育的影响。方法]以一年生杂交狼尾草的根茎为试料,采用3种越冬方式(露地留茬、种茎坑埋、种茎带根地窖储藏),观察杂交狼尾草越冬效果和生长发育情况,研究了杂交狼尾草根茎越冬繁殖特性及不同越冬方式对其生产性能的影响。结果]杂交狼尾草根茎越冬适宜采用坑埋或地窖储藏方式,成活率分别为89.60%±1.790%、76.9%±1.69%,二者差异不显著(P>0.05);种茎带根地窖储藏育苗成活率为79.40%±2.25%,极显著高于种茎坑埋(P<0.01);种茎带根和不带根成活苗移栽大田后,刈割次数均为4次,但2种苗的分蘖数、产量差异显著(P<0.05)。结论]该研究为杂交狼尾草的越冬保存提供了科学依据。

Researchl on Overwintering Reproduction Technique of Hybrid pennisetum Rootstalk

Objective] The research aimed to discuss the overwintering conservation of hybrid Pennisetum and the effect of overwintering modes on the growth and development of hybrid Pennisetum. Method]With the rootstalk of one -year-old hybrid Pennisetum as tested material, 3 overwintering modes including the stubble in open field , the rootstalk buried deep in a hole and the rootstalk with roots stored in cellar to observe the overwintering effect and growth and development of hybrid Pennisetum and study the overwintering reproduction technique of hybrid Pennisetum rootstalk and the effect of different overwintering modes on its production performance.Result] The appropriate modes for overwintering of hybrid Pennisetum ware the rootstalk buried deep in a hole and the rootstalk with roots stored in cellar, with the surviving rate being 89.60%±1.79% and 76.90%±1.690%, resp. The difference between their results was not extremely significant(P>0.05). The surviving rate of seedling with the rootstalk with roots stored in cellar was 79.40%±2.25%, which was much higher than that with the rootstalk buried deep in a hole(P<0.01). After the surviving seedlings of the rootstalks with roots or without roots were planted in the field , the cradling times all were four, but the tillering number and yield were significantly different between the two kinds of seedling (P<0.05). Conclusion] This study provided scientific base for the overwintering conservation of hybrid Pennisetum.