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2005

Rapport – Evaluation of fertilizers and biostimulants on sand-based golf greens and football fields Report from the first experimental year 2005

Trygve S. Aamlid, Hans Martin Hanslin, Bjørn Molteberg, ...

Rapport til Kirke- og kulturdepartementet, Norges Fotballforbund og Norges Golfforbund, 2005. 48 pp.

Forfattere

Trygve S. Aamlid Hans Martin Hanslin Bjørn Molteberg Odd Andersen Erling Stubhaug Åge Susort Anne A. Steensohn Frank Enger

Sammendrag

The effect of various fertilizers and biostimulant on turfgrass establishment, tiller density, colour, overall quality (= visual merit), disease occurrence, thatch accumulation, and root development was evaluated on a new USGA green, a new sand-based football field, and a two year old USGA green at three locations in SE Norway in 2005. Within each trial, all treatments were adjusted to the same total nitrogen rate (2.5, 3.0 and 1.75 kg N/100 m2 on the new golf green, new football field and existing golf green, respectively), but application intervals and total inputs of other nutrients varied according to the recommendations of the fertilizer companies participating in the project. Fertilizer programmes consisting of the inorganic products Arena® (small granules), Fullgjødsel®, and a combination of the two, always applied at biweekly intervals, were used as control treatments on the two year old golf green, the new football field, and the new golf green, respectively. On the new USGA green at Landvik, incorporation of the 100% organic product Sustane or the partly organic product Turf Food into the seedbed before sowing significantly increased turfgrass establishment rate compared to the control treatment. The higher N availability of these treatments, and of a treatment receiving the organic, but easily decomposable product Gro-Power®, was further verified by soil samples taken during grow-in. However, on average for the establishment year and given the longer application intervals, Sustane, Turf Food, the partly organic product Bio Kombi and the seaweed-based products Golf Algin S / Algin Food S, all resulted in quality, tiller density and colour ratings significantly lower than in the control treatment. This was the case also for the liquid fertilizer Flex" which was applied at the same frequency as the control. The effects of adding the seaweed product Maxicrop" to the control treatment, or adding of the mycorrhiza product Endo Roots to the Turf Food treatment, were also not significant. The only treatment that caused an overall impression slightly better than the control was the substitution of some of the Arena® with Gro-Power®, but even this difference was not significant. In late autumn, plots receiving organic fertilizers and biostimulants tended to be more infected by Pythium spp. and Microdichium nivale than the control treatment. On the new football field at Særheim, the mostly organic product ProGreen resulted in faster grow-in than Golf Algin S / Golf Algin Food and Fullgjødsel®, which , in turn, caused faster establishment than Flex". Differences during summer were not significant, but in autumn turfgrass colour and overall quality tended to be better on plots receiving Flex" or the combination of ProGreen and the biostimulant Activo 3-3-6 than on control plots receiving Fullgjødsel®. On the two year old USGA green at Apelsvoll, the colour and overall quality of the Flex" treatment tended to be inferior to the control treatment throughout the growing season. While a double application of the biostimulant GoGreen 2-0-10 + Fe caused a significant improvement in turfgrass colour in autumn, the highest overall quality was usually recorded on plots receiving ammoniumsulfate plus Arena® Høst. The project will continue for another evaluation year. Given that the total nitrogen remain the same in all treatments, participating companies will be allowed to make minor adjustments in the way their products are used in the experiments.

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