泥炭对砂基运动场坪床基质理化性质及草坪草的影响

The Peat Effect on Physical and Chemical Properties of Root Zone Media of Sand-based Sportsfield and Turfgrass

研究不同泥炭施用量对砂基运动场坪床根层基质孔隙度、渗透性、pH值等理化性状的影响，以及对草坪草再生速度、成坪时间、生物量等的影响，探讨泥炭的改良效果及合理的施用量。结果表明：（1）泥炭施入能够使坪床基质的渗透性降低，总孔隙度和毛管孔隙度增大，毛管孔隙和非毛管孔隙的比例趋于平衡，有利于提高坪床保水能力和通气性。（2）泥炭有机质含量高，能改善坪床的养分供应状况，增强草坪草再生能力，缩短成坪时间，提高草坪质量。（3）由于泥炭的pH值偏低，过多施用会使坪床基质偏酸，不利于草坪草生长，因此应控制其用量，适宜的用量为10％-15％。

We studied the effect of diffarent peat application amounts on the permeability, porosity and pH of the root zone media of sand - based sportsfield and the re - growth rate, establishing time, biomass and qualities of turfgrass under different peat application amounts. The result shows： （ 1 ） Peat could decrease the permeability of root zone media decrease,increase the total porosity and capillary, porosity, and balance the capillary porosity and non - capillary porosity became. （2） High organic matter content of peat could improve the nutrition status of root zone media, enhance the re - growth ability of turfgrass, decrease the establishing time and improve the quality of sports turf. （3） The pH of peat is relatiely low and much application could result the root zone media become acid, so we should control its usage. The proper peat application amount is 10% - 15%.