南过渡带混播草坪组合研究

在南过渡带的生境及一定的养护条件下,对多种混播草坪组合设计进行了评比,结果表明:混播组合高羊茅(Festuca arundinacea)凌志40%+高羊茅锐步30%+早熟禾(Poa pratensis)男爵20%+黑麦草(Lolium perenne)顶峰10%表现最好,其次为高羊茅凌志30%+高羊茅锐步30%+早熟禾巴润20%+黑麦草顶峰20%;其余表现不好。从苗期表现来看,黑麦草及高羊茅的比例高者表现好。从成坪后期来看,黑麦草的比例不宜过多,最好不超过20%。混播组合中,随着草坪利用年限的延长,高羊茅的比例稳定,开始时黑麦草及早熟禾的比例有所下降,但早熟禾的比例在后期又有所增加。翦股颖(Agrostis stolonifera)宜作单播草种,狗牙根(Cynodon dactylon)可与高羊茅或早熟禾混播使用。综合考虑成坪速度、草坪质量及病虫害等各方面的因素,混播比例最佳配合为高羊茅∶早熟禾∶黑麦草=7∶2∶1;混播组合为高羊茅∶早熟禾∶黑麦草=6∶2∶2表现也很好,建议使用。高羊茅由多个品种组成的表现更佳。

Research about Turf Mixtures in South Transition Zone

Under the environment and the management measures in south transition zone,we studied species mixed ratio of turfgrass, and the designed mixtures had been compared to each other. The results were as follows： The mixture of Barlexas 40%＋Barrera 30%＋Baronie 20%＋Pinnacle 10% was the best ,the other mixtures were second to it. The variety of density and the speed of growth were according to the logic curve. From the expression of the mixtures during seeding stage,we could conclude that the higher proportion of Tall fescue or Perennial ryegrass in the mixtures the better it would be.But the proportion of Perennial ryegrass would be better to be less than 20 percent .With the growth of the turfgrass ,the propotion of the Tall rescue was steady,while the proportion of Perennial ryegrass and Kentucky bluegrass had been on the decline .But after some time about one year ,the proportion of Kentucky bluegrass had been becoming more and more again.The Creeping bent grass would be better to be seeded singly.Bermuda grass could be mixed with Tall rescue or Kentucky bluegrass.but in winter the view of it was not good. Finally,in the view of turf formation speed,quality of turf ,insectpest and disease etc ,the ideal ratio of Tallfescue,Kentucky bluegrass and Perennial ryegrass was 7：2：1,and it would be better if the Tall fescue consisted of defferent species.