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Home NEWS Science News Biology

Improving ecosystems with aquatic plants

Bioengineer by Bioengineer
February 27, 2019
in Biology
Reading Time: 3 mins read
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Study shows how to grow aquatic plants in large-scale plant production systems

Davie, Florida–Improving Ecosystems with Aquatic Plants

Researchers Lyn Gettys and Kimberly Moore conducted a study and a series of experiments at the University of Florida to determine whether littoral aquatic plants could be grown effectively using a variety of substrates and irrigation methods similar to techniques used by traditional greenhouses for large-scale plant production.

Their discoveries are shared in the article Greenhouse Production of Native Aquatic Plants available Open Access in the February issue of HortTechnology.

Wetland restoration is critical for improving ecosystem services, but many aquatic plant nurseries do not have facilities similar to those typically used for large-scale plant production. This study attempts to determine what methods would effectively benefit the large-scale production of aquatic plants as a possible resource of bolstering the improvement of the ecosystems.

Projects that focus on restoration, mitigation, and enhancement of aquatic and wetland regions provide valuable ecosystem services and habitat for native flora and fauna. These projects call for a mixture of plant types and sizes to create the diverse architecture needed to provide good habitat for native animals.

There is strong demand for the native littoral zone (shoreline or shallow water) plants required to execute these projects, but many wetland nurseries are unable to produce sufficient quantities of “right-sized” plant material due to inadequate facilities and infrastructure.

This problem can be viewed as an opportunity and may be addressed by determining how to cultivate these species using the greenhouse techniques that are employed to culture landscape plants. Gettys and Moore conducted experiments focusing on four littoral zone species: arrow arum, blue-eyed grass, golden club, and lemon bacopa. All four species are perennials native to the United States and are easily propagated by division.

These experiments were designed to provide guidelines for growers who are interested in capturing part of the growing niche market for littoral-zone plants without costly infrastructure upgrades.

Plants were grown in pots with drainage holes that were filled with potting substrate, topsoil, coarse builders’ sand, or a 50/50 mix of topsoil and builders’ sand. These substrates were amended with controlled-release fertilizer and were watered using either overhead irrigation or subirrigation. The plants were grown for 16 weeks, then they were scored for quality and height before a destructive harvest.

Blue-eyed grass and arrow alum performed best when subirrigated and cultured in potting substrate or sand. Golden club and lemon bacopa grew best when plants were cultured in potting substrate and maintained under subirrigation.

The finding that these species performed best under subirrigation conditions was not unexpected because early research on the culture of littoral and obligate wetland species revealed that best growth was achieved in flooded sand. Because sand substrates tend to have lower water-holding capacity, they are best used in aquatic plant production under flooded settings.

The experiments reveal that good quality and growth of these littoral zone plants can be accomplished using standard commercially available containers, substrates, controlled-release fertilizer, and inexpensive flood trays that are easily constructed to provide subirrigation.

Although there was no “one size fits all” method for optimal culture of all wetland species, greenhouse production of these perennials should be fairly straightforward without significant modifications or changes to existing infrastructure.

The researchers determined that it would be wise for growers to evaluate production methods on a species-by-species trial before gearing up for large-scale greenhouse production of wetland plants.

Gettys adds, “One of our main missions at The University of Florida IFAS is to give our stakeholders the tools they need to succeed. We hope that the information provided in this article will help nurseries branch out from traditional crops and dip their toes into the lucrative aquatic and wetland plant market.”

###

The complete article is available Open Access on the ASHS HortTechnology electronic journal web site: DOI: https://doi.org/10.21273/HORTTECH04212-18.

You may contact Lyn Gettys of The University of Florida at [email protected] or call her at (561)301-6614 .

Founded in 1903, the American Society for Horticultural Science (ASHS) is the largest organization dedicated to advancing all facets of horticulture research, education, and application. More information at ashs.org.

Media Contact
Michael Neff
[email protected]
http://dx.doi.org/10.21273/HORTTECH04212-18

Tags: Agricultural Production/EconomicsAgricultureEcology/EnvironmentFisheries/AquacultureHydrology/Water ResourcesMarine/Freshwater BiologyPlant SciencesPollution/Remediation
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