7 Aug 2018
Oxygenation of Irrigation Water during Propagation and Container Production of Bedding Plants
Yafuso, E.J., and P. Fisher (University of Florida)
Research at the University of Florida focused on evaluating whether oxygenation of irrigation water affected plant growth and substrate dissolved oxygen (DO) levels during mist propagation of unrooted cuttings and subsequent growth in containers. There were no measured differences in root growth when ambient tap or oxygenated water was used during mist propagation of calibrachoa or lobelia. Water that passed through fine mist nozzles increased the droplet surface area decreasing DO in super-saturated water and increased DO in ambient tap water to 100% DO saturation (8.7 ppm). Continued growth of three bedding plants were irrigated with nutrient supplemented water at ambient or oxygenated DO levels when pots dried to 45% of container capacity resulted in similar growth. Peat-based substrate contains high porosity facilitating oxygen supply to roots through air-filled pores. Read on to learn the key findings.
HortScience 2017 Yafuso and Fisher (306 KB)
26 Jun 2018
A Cost Analysis for Using Recycled Irrigation Runoff Water in Container Nursery Production: A Southern California Nursery Case Study
Pitton, B.J.L., Haver, D.L., Oki, L.R. (UC Davis), Hall, C.R. (Texas A&M), and S.A. White (Clemson University)
Recycling irrigation runoff water reduced costs for a southern California container plant nursery originally using expensive high-quality water. Water cost for municipal supplied water was $2.26 to $2.91 per 1000 gallons. Water capturing and recycling system construction and infrastructure accounted for a large portion of recycled water cost resulting in $0.92 to $1.21 per 1000 gallons. However, rebates and a grant reduced total and per volume recycled water cost to $0.43 and $0.53 per 1000 gallons. Recycled water is a viable alternative to many expensive water sources and public funds facilitate adoption of recycled water for irrigation.
12 Jun 2018
Fernandez, Thomas R. (Michigan State University)
An earlier article discusses how much water a substrate can hold and how much to replenish at various depletion levels, but not how quickly plants use water. A better understanding of plant water use will allow irrigation scheduling based on the plants rather than a set volume of water.