| |
| Web URL(s): | https://scisoc.confex.com/scisoc/2018am/meetingapp.cgi/Paper/111591
Last checked: 11/19/2018
Requires: JavaScript |
|---|
| Publication Type:
| Report |
|---|
| Content Type: | Abstract or Summary only |
|---|
| Author(s): | Tishchenko, Viktor;
Raymer, Paul L.;
LaRue, Jacob L. |
|---|
| Author Affiliation: | Tishchenko: University of Georgia-Griffin, Griffin, GA; Raymer: Crop and Soil Sciences, University of Georgia - Griffin Campus, Griffin, GA; LaRue: R&D, Valmont Irrigation, Valley, NE |
|---|
| Title: | Depth and spacing optimization of porous subsurface tube installation for turfgrass irrigation in Georgia Piedmont ultisols |
|---|
| Section: | C05 turfgrass science
Other records with the "C05 turfgrass science" Section
Turfgrass science - II poster
Other records with the "Turfgrass science - II poster" Section
|
|---|
| Meeting Info.: | Baltimore, Maryland: November 4-7, 2018 |
|---|
| Source: | ASA, CSSA and SSSA International Annual Meetings. 2018, p. 111591. |
|---|
| Publishing Information: | [Madison, Wisconsin]: [American Society of Agronomy, Crop Science Society of America, and Canadian Society of Agronomy] |
|---|
| # of Pages: | 1 |
|---|
| Abstract/Contents: | "Growing scarcity of water resources and water use restrictions now demand for improved water use efficiency of irrigation systems. A promising alternative to conventional sprinkler irrigation is subsurface irrigation. Several subsurface irrigation systems are under active development offering various designs and modifications, but most have limited application for turfgrass management. In this study, an innovative, low-pressure, energy-efficient, underground tubing technology developed by Valmont known as Root Demand Irrigation (RDI) was tested on seashore paspalum (Paspalum vaginatum L.) grown on Cecil-Appling soils of the Piedmont plateau. Unlike traditional subsurface drip irrigation, porous subsurface tubes serve as a water reservoir releasing water under low pressure (~2psi) all along the tube, presumably (as claimed by manufacturer) in response to plant exudates when plants need it. Turfgrass response to tube installation depths of 15 and 30 cm and spacing intervals of 30, 45, and 60 cm as well as irrigation duration optimization were evaluated. Soil moisture content was measured via frequency domain reflectometry (capacitance) sensors installed at a depth of 7.5cm, and access tubes placed at 0 - 40 cm. Results showed better water supply to the root zone at shallow (15 cm) installation with more uniform and better horizontal water distribution in the upper soil horizons down to 30 cm. Normalized difference vegetation index (NDVI) measurements taken using the GreenSeeker optical sensor and regular spectrum images captured using a DJI drone camera revealed special variation in turfgrass growth with better performance and uniformity at narrower spacings of 30 and 45 cm and installation depth of 15 cm. These treatments had 50-75% lower water use as measured with integrated Netafim water flow meter, compared to sprinkler irrigation. Significant variability in turfgrass growth along the tubes was also observed. These variations were attributed to frequent tube collapses due soil compaction or overburden or tube ruptures. This research indicates that further product development would be required to adapt this system for reliable use in turfgrass management. Valmont suspended sales of this system in November of 2015." |
|---|
| Language: | English |
|---|
| References: | 0 |
|---|
| Note: | This item is an abstract only!
"332"
"Poster Number: 1233" |
|---|
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Tishchenko, V., P. L. Raymer, and J. L. LaRue. 2018. Depth and spacing optimization of porous subsurface tube installation for turfgrass irrigation in Georgia Piedmont ultisols. Agron. Abr. p. 111591. |
| Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=302242 |
| If there are problems with this record, send us feedback about record 302242. |
| Choices for finding the above item: |
|---|
| Web URL(s):
https://scisoc.confex.com/scisoc/2018am/meetingapp.cgi/Paper/111591
Last checked: 11/19/2018
Requires: JavaScript |
| Find from within TIC:
Digitally in TIC by record number. |
| Request through your local library's inter-library loan service (bring or send a copy of this TGIF record) |
