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Publicação
Peat alternatives in sand-based rootzone mixture for golf turfgrass growth
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Resumo(s)
Peat is a very important growing media in the agricultural and ornamental sectors, on golf courses, among others, but its extraction has a high environmental impact. For this reason, it is necessary to find more economical, locally produced and more sustainable alternative materials.The objectives of this work were to study three organic amendments alternatives to peat; to evaluate the effect of their residual nitrogen in the plant growth and to identify possible existing weeds. The organic amendments tested were peat (PT, control), sewage sludge compost with pine bark (NA), organic green compost (NV) and cork “earth” (CE). The grasses studied were Lolium perenne L. and Agrostis stolonifera L.. To obtain the aerial biomass production, shoot harvesting was made weekly and the dry matter was weighted. Posterior macro- and micronutrient present in the biomass was evaluated. Regarding the rootzone mixtures, the organic matter content, pH, electrical conductivity and the exchangeable acidity were analyzed as well as the extractable macro and micronutrients, and the exchangeable bases. The results showed that the grasses that grew in the rootzone mixtures with NA had the higher aerial biomass production, comparing with peat, followed by the rootzone mixture with NV. These two organic amendments were those who had higher amounts of nitrogen (N) available in the absence of N fertilization. Possible effects of antagonism between elements, namely calcium and magnesium, were due to the excess of nutrients in the rootzone mixtures, such as potassium. The weeds observed were eudicotyledonous and emerged from the organic amendment CE. Its cut would be effective, in order to control them, with the exception of the genus Sonchus spp.. The rootzone mixture where the plants had lower development and tillering was the CE and the rootzone mixtures NA and NV induced good development, as well as the rootzone mixture PT
Descrição
Mestrado em Engenharia Agronómica / Instituto Superior de Agronomia. Universidade de Lisboa
Palavras-chave
Agrostis stolonifera cv. Penn-A4 Lolium perenne cv. Benchmark weeds peat organic amendments
Contexto Educativo
Citação
Acácio, D.C. - Peat alternatives in sand-based rootzone mixture for golf turfgrass growth. Lisboa: ISA, 2020, 115 p.