关键词: 假俭草, 草坪, K肥, 叶绿素, 绿度, 品质

Abstract: Potassium application has a positive effect on changing the color, prolonging the green period and improving the quality on turf. In proper time, applying potassium to centipedegrass (Eremochloa ophiuroides) with proper amount could increase chlorophyll content. Potassium benefited to prolong the green period, especially when applying with 4.5g/m² K₂O. It also increased density, strengthened hardiness, resulting in improving the quality of turf at different periods. Equal amount of potassium applied with different frequencies gave the best results than single dose application. Each amount of application could not greater than 2.0g/m² K₂O, and annual amount not greater than 6.0g/m² K₂O. Potassium was required at different growing periods, but the better results were given under high and low temperature conditions.

Key words: centipedegrass, turf, potassium fertilizer, chlorophyll, green degree, quality