不同修剪处理对匍匐翦股颖币斑病的影响

Effects of different mowing treatments on the incidence of dollar spot in creeping bentgrass

摘要:

【目的】研究不同修剪处理对匍匐翦股颖币斑病发病的影响，为草坪管理提供理论参考。 【方法】分别将 3 种不同修剪频率 1 天 1 次（F1）、2 天 1 次（F2）、4 天 1 次（F3）和 3 种不同修剪高度 1. 0 cm （H1）、1. 5 cm（H2）、2. 0 cm（H3）组合作为处理，通过病原菌侵染试验测定不同修剪组合下病斑直径大小以及匍匐剪股颖的生理响应。【结果】随着修剪频率和修剪高度的提高，呈现出病斑直径、MDA 含量逐渐变小，相关抗氧化酶活性、可溶性蛋白含量逐渐升高的趋势，F1H3 组具有最好的病情控制效果（病斑直径为 0. 43 cm）和最高的抗氧化酶活性，F3H1 组病情最重（病斑直径为 2. 5 cm），相关抗氧化酶活性、可溶性蛋白含量也最低。【结论】草坪在湿度较高的时期适当提高修剪频率和修剪高度可以在一定程度上减轻币斑病的病症。

Abstract:

【Objective】 To understand the influence of different mowing treatments on the incidence of creeping bentgrass dollar spot.【Method】 We combined three different mowing frequencies （once a day，once in 2 days，once in 4 days） and three different mowing heights （1. 0 cm，1. 5 cm，and 2. 0 cm） as treatments，Through pathogen infection test to explore the diameter of dollar spot foci and the physiological response of creeping bentgrass under different mowing combinations.【Result】 With the increase of mowing frequency and mowing height，the diameter of dollar spot foci and the content of MDA gradually decreased. The activity of related antioxidant enzymes and soluble protein gradually increased. The F1H3 group had the best disease control effect （0. 43 cm diameter of spot foci） and the highest antioxidant enzyme activity. In contrast，the F3H1 group had the most severe disease condition （2. 5 cm diameter of spot foci），and the related antioxidant enzyme activity and soluble protein content were lowest.【Conclusion】 This experiment shows that appropriately increasing the mowing frequency and mowing height in the period of high humidity can alleviate the symptoms of coin spot disease to a certain extent.