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2002年5～11月在田间条件下就速效肥和缓释肥对草坪蒸散量的影响进行了研究。结果表明:施肥后草坪的蒸散量增大,其中,速效肥处理超过对照96.1mm,多耗水17.1%;速效肥+缓释肥和缓释肥处理分别增加了60.7mm和52.0mm,多耗水10.8%和9.2%;速效肥处理草坪蒸散量明显高于速效肥+缓释肥和缓释肥处理(P<0.05)。施肥提高蒸散量的原因是增大了草坪草的生长速度及分蘖密度。缓释肥处理生长速度的增加幅度较小,株丛密度较高,且各月份比较稳定,速效肥处理则波动很大;此外,施用缓释肥更有利于地下生物量的积累。综合比较,在草坪管理中应减少速效肥的使用量,适当增加缓释肥的应用比例。
From May to November in 2002, the effects of quick-acting fertilizer and slow-release fertilizer on the lawn evapotranspiration were studied under field conditions. The results showed that the evapotranspiration of turfgrass increased after fertilization, of which the quick-acting fertilizer treatment exceeded the control by 96.1mm, and the water consumption was more than 17.1%; the fast-acting fertilizer + slow-release fertilizer and slow-release fertilizer treatment increased by 60.7mm and 52.0mm, Water 10.8% and 9.2%. The evapotranspiration of quick-effect fertilizer was significantly higher than that of quick-acting fertilizer + slow-release fertilizer and slow-release fertilizer (P <0.05). The reason for increasing evapotranspiration by fertilization is to increase the growth rate and tiller density of turf grass. The growth rate of slow release fertilizer increased less, the plant density was higher, and the monthly stability was relatively stable. The quick-acting fertilizer fluctuated greatly. In addition, slow release fertilizer was more beneficial to the accumulation of underground biomass. Comprehensive comparison, lawn management should reduce the amount of quick-acting fertilizer, an appropriate increase in the proportion of slow-release fertilizer application.