Current nutrient management practices and technologies used in North American greenhouse and nursery industries
North American greenhouse and nursery operations are continuously evolving their nutrient best management practices (BMP) in response to increasing water shortages and more stringent legislation aimed at reducing nutrient discharge/runoff to the environment. This article provides an overview of current nutrient management practices and some of the BMPs in this region. One of the most common practices is to capture and reuse irrigation/fertigation solution to reduce or eliminate discharge to the environment. There are two major challenges inherent in this practice: one, at least as perceived by the industry, is the proliferation and spreading of waterborne pathogens in the nutrient solution recycling systems; another is the nutrient imbalance issue (e.g., Na+ accumulation and K+ depletion) in the recycled nutrient solution. This paper provides an overview of the water/nutrient solution disinfection technologies and nutrient-sensor-based feedback control systems currently available or under development in North America for integration into recirculating fertigation systems. The emphasis of this paper is on identifying knowledge and technology gaps, and discussing future research directions.
Zheng, Y. (2018). Current nutrient management practices and technologies used in North American greenhouse and nursery industries. Acta Hortic. 1227, 435-442
beneficial microorganism, controlled-release fertilizer, disinfection, feedback control system, nutrient solution reuse, pathogen, sensor