4.5 Article

Effects of perennial ryegrass competition on bermudagrass and hybrid bermudagrass cover, biomass, and total nonstructural carbohydrate accumulation

期刊

CROP SCIENCE
卷 61, 期 5, 页码 3179-3186

出版社

WILEY
DOI: 10.1002/csc2.20554

关键词

-

类别

向作者/读者索取更多资源

The study shows that the coverage of bermudagrass is closely related to the cumulative competition-free growing degree-days and daily light integral, but may vary depending on locations or years. Different bermudagrass cultivars require varying amounts of heat and light units to achieve 97% coverage.
To extend golf play in early summer or hasten athletic field preparation in late summer, turf managers often desire to allow perennial ryegrass (Lolium perenne L.) to persist and compete with overseeded bermudagrass (Cynodon dactylon L. Pers.) or hybrid bermudagrass (Cynodon dactylon x C. transvaalensis Burtt Davy) during optimal growing conditions. Understanding how competition-free growing degree-days (CFGDD) influence bermudagrass total nonstructural carbohydrates (TNC), biomass, and visual green cover may aid in turf-use scheduling. Twenty-four weekly treatments of foramsulfuron eliminated perennial ryegrass competition in replicate plots and allowed assessment of competition-free bermudagrass coverage, biomass, and TNC as related to cumulative heat and light units. Results from this study indicate that bermudagrass coverage is a function of cumulative CFGDD and competition-free daily light integral (CFDLI) but is dependent on locations or years where cultivars or seasonal legacy are variable. At three locations, 'Patriot' and 'Midiron' hybrid bermudagrass and 'Riviera' bermudagrass required 603, 709, and 959 CFGDD and 2,447, 3,271, and 4,556 mol m(-2) CFDLI to reach 97% coverage, respectively. Trends of TNC per unit area, however, continued to increase after full coverage was achieved and up to the point at which no more heat or light units were accumulated in fall. Absence of a clear asymptote in the trends suggests that heat or light units that were seasonally accumulated in Blacksburg, VA, were insufficient to achieve maximum bermudagrass carbohydrate reserves before winter dormancy.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.5
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据