关键词: 运动场草坪, 坪床, 改良物质, 淋溶

Abstract:

Sand dominated rootzone has been widely used in sports turf at present, but it results in water loss and leaching of nutrients from rootzone easily. To resolve the above problems, we designed 5 different rootzone compositions, namely P, Z, M, T5, T10 by using sand mixed with peat, zeolite, peat plus zeolite, absorbent polymers component laid at a depth of 5 cm and 10 cm respectively to study the regulation effects of different rootzone compositions on nutrients leaching. The rootzone mixed with peat and zeolite and rootzone laid with absorbent polymers component significantly decreased nitrogen leaching. The rootzone mixed with peat could significantly decreased phosphorus leaching whereas the rootzone mixed with zeolite could significantly decrease the potassium leaching. The rootzone laid with absorbent polymers component at a depth of 5 cm had greater effects on decreasing phosphorus leaching, but had no effects on decreasing potassium leaching. The above findings could be expected to improve the sports turf rootzone quality and reduce the environmental pollution resulting from fertilizer nutrients leaching through comprehensively applying the research results of this study to practice.

Key words: Sports turf, Rootzone, Amendments, Leaching