The objective of the research is to determine if there were seasonal changes in rooting patterns,and total nonstructural carbohydrate (TNC) concentration between six high shoot density and eight standard creeping bentgrass cultivars on putting greens.The results as follows:1) The number of tillers deffered significantly (P≤0.05) among the cultivars in July but not in April or October.2) No differences in root dry weight were observed among cultivars for root samples collected from June 1997 through Nov.1998.Root weight did decrease for all cultivars because the graducal drop of mowing height from 11 mm to 3.1 mm during the period June 1997 to July 1997.3)Percentage TNC was not significantly different (P<0.05) among the entries for two of 18 samling dates.%比较了在果岭区匍匐剪股颖的6个多枝条密度品种和8个标准品种在不同时期,分蘖数、根干重、非结构性糖含量的变化规律.得出了以下结论:1)品种之间的分蘖数在7月差异显著(P≤0.05),但4月、10月不显著,2)品种之间根重无区,但春季6个高枝条密度品种的根重比8个标准品种的要重;随修剪高度降低,根重减少.3)在18个采样日期中只有两个时期的非结结构性糖的含量显著不同,即在相对高温期间高枝条密度品种较标准品种非结区性糖的积累量要少.
展开▼
