人工践踏对无土草坪基质的影响

本试验采用人工践踏的方式，研究了不同组合配比的基质对无土草坪耐践踏性的影响。结果表明，良好的无土草坪基质配比及适合的厚度是保证无土草坪优良的耐践踏性及观赏性的关键。本试验中，草坪草生长基质层和弹性材料层均为25 mm，结构合理、厚度适中，克服了现有草坪基质薄、持水力差的缺点。在相同践踏强度下，能维持较高水平的草层高度、草坪盖度和草坪草分蘖数，分别达到了5.14 cm、97.60%和123.97 个·dm-2，且停止践踏后草坪质量能快速恢复。均匀混合的草坪草生长基质层和弹性材料层，在厚度一致的前提下并不耐践踏，实际效果不好。土壤坪床的处理效果最差。因此，具有独立的草坪草生长基质层和弹性材料层且厚度适中的基质，适用于生产耐践踏性好的无土草坪。

Effects of artificial trampling on soil free turf substrate

The effects of trampling stress on different soil free turf substrates were studied in this study. The results showed that, a reasonable soil free turf medium can improve the capacity of resistance to trampling and ornamental value of turfgrass. In this study, both the turfgrass growth substrate layer and elastic material layer in soil free substrates were 25 mm, and individual. They had a reasonable structure and thickness, which could overcome the shortcomings of thick substrate and low water holding capacity. Under the same trampling stress, the soil free turfs had a higher turfgrass height, plant coverage and number of tillers than that of normal turf, and the highest vales were 51.4 cm, 97.60%, and 123 tiller·dm-2, respectively. Besides, the soil free turfs could recover in a shot time after stopping trampling. However, for the same thickness, the substrate mixed turfgrass growth substrate layer and elastic material layer together had a lower ability of resistance to trampling. The soil substrate was the worst. So substrates with a individual turfgrass growth substrate layer and elastic material layer, and a reasonable thickness are fit to produce good soil free turfs with a high capacity of resistance to trampling stress.