Tuesday, 8 November 2005
6

Turf Quality and Algae Development on Various Textural Soils.

She-Kong Chong and Richard Boniak. Southern Illinois University Carbondale, Dept. of Plant & Soil Science, Southern Illinois University, Carbondale, IL 62901-4415

The objective of this study was to examine turfgrass quality and algae development on different textural soils. Seven rooting materials, mixed with various proportions of silt loam and sand, were tested in green house. The rooting materials (treatments) included silt loam and sand ratio of 0:100, 10:90, 20:80, 30:70, 40:60, 50:50, and 100:0 combinations. The algae experiment was carried out in 15-cm clay pots with seven replications per treatment. The soil was packed uniformly to about 1.5 cm below the rim of the pot and fertilized to enhance algae development. The pots were misted twice a day with water. Turf quality experiment was conducted in 45-cm (diameter) x 45-cm (depth) soil columns with four replications per treatment. The Bermudagrass was used as a test grass. At the beginning of the experiment, the grass was irrigated with the same amount of water but under different schemes. After 9 months of the test, the grass was irrigated twice a week with the same amount of water for all treatments. Results indicated that as silt loam in the rooting mix increased, soil water intake rate decreased. Soil with higher silt loam content tended to be more vulnerable to algae development. However, for treatments with silt loam less than 0.3 g g-1 no statistical different was observed in algae development. For the turf quality study, an inverse relationship was found. As sand content increased, the quality of turf decreased. Nevertheless, turf quality was not only related to soil texture, it was also influenced by irrigation. In order to maintain healthy turf, soil texture should be considered in the selection of proper irrigation scheme.

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