不同水分处理对高羊茅草耗水及生长质量的影响

为了探求不同土壤水分条件对草坪草耗水和生长质量的影响,对冷季型高羊茅草坪草在整个生育期内的蒸散量、生长速度和表观质量等特性进行了研究。研究结果表明,草坪草的耗水量随着土壤水分的增加而增加,蒸散量在中午(12:00—15:00)最活跃;植株生长速度与灌水量呈显著的正相关性,但当土壤水分达到一定程度之后,再增加灌水量不能明显提高草坪草的生长速度;土壤含水量越大草坪草表观质量不一定越好,当灌溉控制土壤水分下限小于70%FC(田间持水量)时,灌水量能显著提高草坪草的质量,当灌溉控制土壤水分下限大于70%FC时,灌水量对草坪草的表观质量影响较小。

Effect of Different Water Treatments to Water Consumption and Growth Quality of Festuca elata

The paper studies characteristics of evapotranspiration,growth rate and surface quality of cold-season Festuca elata during whole growing period in order to seek the effect of water consumption and growth quality of turf grass under different soil moisture condition. The outcomes show that the water consumption of turf grass is increased along with the increase of soil moisture and evapotranspiration mostly active at the noon(12:00-15:00). The growth rate of turf grass accelerates with the increase of irrigation amount. But when the soil moisture reaches to a certain extent,the increased irrigation can not improve the growth rate of turf grass obviously.The higher soil moisture content does not always make the better apparent quality of turf grass. When the controlled lower limit of soil moisture is smaller than 70% of field capacity,irrigation can obviously improve the quality of turf grass,otherwise the effect to apparent quality of turf grass is smaller.