Next Article in Journal
Catchment-Scale Integrated Surface Water-Groundwater Hydrologic Modelling Using Conceptual and Physically Based Models: A Model Comparison Study
Next Article in Special Issue
Sensitivity of Hydrangea paniculata Plants to Residual Herbicides in Recycled Irrigation Varies with Plant Growth Stage
Previous Article in Journal
Cost of Water Use for Negotiating Rates in Energy Exchanges: Evidence from the Hydroelectric Industry
Previous Article in Special Issue
A Comparison of Irrigation-Water Containment Methods and Management Strategies Between Two Ornamental Production Systems to Minimize Water Security Threats
Open AccessArticle

Optimizing Substrate Available Water and Coir Amendment Rate in Pine Bark Substrates

1
Department of Biosystems Engineering and Soil Science, University of Tennessee, 2506 E J Chapman Drive, Knoxville, TN 37996, USA
2
Department of Plant Sciences, University of Tennessee, 2505 E J Chapman Drive, Knoxville, TN 37996, USA
3
USDA Technology Application Unit, 1680 Madison Ave. Wooster, OH 44691, USA
*
Author to whom correspondence should be addressed.
Water 2020, 12(2), 362; https://doi.org/10.3390/w12020362
Received: 14 December 2019 / Revised: 23 January 2020 / Accepted: 24 January 2020 / Published: 29 January 2020
(This article belongs to the Special Issue Irrigation and Water Resources Management of Landscape Plants)
Water resources can be used more efficiently by including sustainable substrate components like coir that increase water-holding capacity. The first objective of this study was to evaluate the impact of coir amendment rate on plant available water and plant gas exchange, with the goal of optimizing substrate available water and determining the optimum coir amendment rate in a greenhouse environment. The second objective was to establish the optimum method of determining plant available water using either plant gas exchange parameters or substrate physical properties. Greenhouse experiments were conducted with Hydrangea paniculata ‘Jane’ (Little Lime® hardy hydrangea) potted with one of five different coir rates (0%, 10%, 25%, 40% and 65%) mixed with pine bark on a volume basis. Plant gas exchange parameters and substrate water content were measured daily over a range of increasingly drier substrate moisture contents. Actual photosynthetic rates increased with increasing coir amendment rate and were highest with 65% coir amendment. Amending pine bark with coir increased the water storage capacity, plant available water, and plant gas exchange parameters. Results suggest that 65% coir amendment rate was the optimum amendment rate among those tested in a greenhouse environment and plant photosynthetic rate was the better method of determining plant available water. View Full-Text
Keywords: Hydrangea paniculate; moisture retention curve; nursery crops; on-demand irrigation; plant available water; water buffering capacity Hydrangea paniculate; moisture retention curve; nursery crops; on-demand irrigation; plant available water; water buffering capacity
Show Figures

Figure 1

MDPI and ACS Style

Basiri Jahromi, N.; Fulcher, A.; Walker, F.; Altland, J. Optimizing Substrate Available Water and Coir Amendment Rate in Pine Bark Substrates. Water 2020, 12, 362.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop