The use of biosolids as potential organic fertilizer on greenhouse flowers and turfgrasses

污水污泥是城市水处理产生的废物，主要由厌氧消化器脱水的微生物生物量组成。堆肥生物固体改善土壤肥力和结构，同时对根和叶面病原体提供疾病抑制。在温室和田间种植的植物中添加生物固体可以通过添加拮抗生物来帮助自然抑制病害的渗透。生物固体肥料的缓慢矿化提供了长期的养分释放，这对环境有益。如果这些改良剂以适当的速率施用于土壤，它们可以成为安全有效的有机肥来源。草坪草是一种多年生作物，可以创造完全的地面覆盖，具有相当高的根冠比。在维护区内种植的草坪草需要大量的肥料，特别是氮，并且由于许多草坪草生长在沙质土壤上，因此可以从增加的有机质中受益。扩大这一行业对于减少垃圾填埋场的污水污泥量至关重要，因为垃圾填埋场的营养丰富的品质没有得到充分利用。包括位于安大略省的Lystek公司在内的几家公司已经将这种废物转化为营养物质和微生物群落的可行来源。本研究的目的是确定生物固体在非粮食作物（如草坪草生产和观赏花卉种植）中的适用性，并帮助了解生物固体如何改变土壤和植物根系健康。

Sewage sludge is a waste product produced from municipal water treatment and is composed primarily ofdewatered microbial biomass from the anaerobic digester. Composted biosolids improve soil fertility andstructure while providing disease suppression for root and foliar pathogens. Additions of biosolids to plantsgrown in greenhouse and field can help to naturally suppress disease infiltration by the addition of antagonisticorganisms. The slow mineralization of biosolids fertilizers provides long-term nutrient release which isbeneficial for the environment. If these amendments are applied to soils at an appropriate rate they could be asafe and efficient source of organic fertilizer. Turfgrass is grown as a perennial crop that can create completeground cover and has a rather high root to shoot ratio. Turfgrasses grown for maintained areas require highamounts of fertilizer, especially nitrogen, and can benefit from an increase organic matter as many turfgrassesare grown on sandy soils. Expansion into this industry is essential for reducing the amount of sewage sludgesent to landfill where its nutrient rich qualities are underutilized. Turning this waste product into a viablesource of nutrients and microbial communities has been done by several companies including the Ontariobased company named Lystek. The objectives of this research are to determine the suitability of use innon-food crops such as turfgrass production and ornamental floriculture and help to understand how biosolidschange soil and plant root health.