从整个评定时期看，草地早熟禾的平均绿度比高羊茅和多年生黑麦草高。
Seeing from the whole evaluation period, the average green degree of Kentucky bluegrass is higher than that of tall fescue and perennial ryegrass.
本研究应用组织转化的理论和方法，通过周割试验对多年生黑麦草叶片组织的转化进行较为深入的研究。
The turnover of lamina tissue of perennial ryegrass was systematically studied through cutting experiment by the application of the theory and methods of the tissue turnover.
叶腐病由腐霉属真菌的菌丝体危害所致，主要损害多年生黑麦草的叶片，影响植株分蘖，造成草坪自然稀疏。
Leaf mould was attacked by Fusarium nival, and had effect on perennial ryegrass's leaves and tillers, leading turf to become sparse.
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