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因地制宜地配置不同沙土比例的根系层是运动场草坪场地建造中最为关键的技术之一。试验将沙土配比设为11个处理,即沙/(沙+土)从0～100kg100kg-1,每10kg100kg-1为一个梯度,并采用压力膜法研究了不同沙土配比土壤的持水特性。结果表明,公式θ=AS-B能较好地拟合不同沙土配比土壤的水分曲线,所得方程均达到了极显著(0.001)水平;随含沙量增加,土壤脱湿曲线逐渐下移,表明同一土壤吸力条件下,土壤含水量随含沙量增加逐渐降低;根据土壤比水容量出现10-2级的先后顺序,11个配比土壤的供水能力可归结为三类。水分有效性受配比土壤的颗粒组成影响呈现出不同的变化规律,且与颗粒粒级的相关性显著。
It is one of the most crucial technologies in the construction of stadium lawn field to dispose the root layer with different proportions of sand and soil according to the local conditions. The sand-soil ratio was set as 11 treatments, that is sand / (sand + soil) from 0 to 100kg100kg-1 and 100kg-1 per 10kg as a gradient. The water-holding characteristics of soil with different sand-soil ratios . The results show that the equation θ = AS-B can well fit the soil moisture curve of different sand-soil ratio, and the equation reached a very significant (0.001) level. With the increase of sediment concentration, Under the same soil suction condition, the soil water content decreases with the increase of sediment concentration. According to the order of 10-2 soil specific water capacity, the water supply capacity of the 11 soil profiles can be attributed to three categories. Water availability is affected by the particle composition of the soil with different changes, and significant correlation with the particle size.