优良禾草苇状羊茅改良退化人工草地试验研究

A study on improving degraded sown grassland with tall fescue

在贵州南部气候条件下 ,采用苇状羊茅、多年生黑麦草、扁穗雀麦、白三叶等 4种优质牧草 ,通过不同的处理组合对多年生黑麦草割草地进行带状改良 ,结果表明 :凡含有苇状羊茅的处理组合改良效果较好 ,草地植被特征增强 ,耐牧性能提高 ;改良方式中窄带改良比宽带改良效果好。生产实际中建议采用窄带改良方式 ,选用苇状羊茅 +多年生黑麦草 +白三叶这个草种组合 ,以达到增强草地植被特征、优质、持久。

The cutting ryegrass grassland was improved by means of banding way using different treatment combination of 4 elite forage species, including tall fescue ( Festuca arundinacea Schreb.), perennial ryegrass ( Lolium perenne L.), flat bromegrass ( Bromus catharticus Vahl) and white clover ( Trifolium repens L.). The results showed that the combinations contained tall fescue performed a better improving effects than others, i.e.: grass height and coverage were increased and grazing tolerance was enforced. At same time the improving way of narrow banding was better than that of wide banding. Therefore, the combination of Festuca + Lolium + Trifolium by means of narrow banding way was suggested to use in grassland improvement.