go create the next great website!
TRANSCRIPT
![Page 1: Go Create The Next Great Website!](https://reader033.vdocuments.net/reader033/viewer/2022052707/587c82e81a28abf6368b4cc1/html5/thumbnails/1.jpg)
Turfgrass Response to
Iron Fertilization
Travis Shaddox, Ph.D.
![Page 2: Go Create The Next Great Website!](https://reader033.vdocuments.net/reader033/viewer/2022052707/587c82e81a28abf6368b4cc1/html5/thumbnails/2.jpg)
http://wfrec.ifas.ufl.edu/turfgrass/wp-content/uploads/sites/2/2014/10/FTGA-
Iron.pdf
![Page 3: Go Create The Next Great Website!](https://reader033.vdocuments.net/reader033/viewer/2022052707/587c82e81a28abf6368b4cc1/html5/thumbnails/3.jpg)
Background
Most turf managers use an Fe component
in granular fertilizer
Soil test may or may not recommend
applications of Fe in Florida soils
No consideration is given to the form of Fe
![Page 4: Go Create The Next Great Website!](https://reader033.vdocuments.net/reader033/viewer/2022052707/587c82e81a28abf6368b4cc1/html5/thumbnails/4.jpg)
Iron is an economic concern,
not environmental.
![Page 5: Go Create The Next Great Website!](https://reader033.vdocuments.net/reader033/viewer/2022052707/587c82e81a28abf6368b4cc1/html5/thumbnails/5.jpg)
Iron is an economic concern,
not environmental.
![Page 6: Go Create The Next Great Website!](https://reader033.vdocuments.net/reader033/viewer/2022052707/587c82e81a28abf6368b4cc1/html5/thumbnails/6.jpg)
Objective
To determine the influence of various Fe
sources on turf response
![Page 7: Go Create The Next Great Website!](https://reader033.vdocuments.net/reader033/viewer/2022052707/587c82e81a28abf6368b4cc1/html5/thumbnails/7.jpg)
Materials and Methods
Treatments
– Untreated
– Iron Sulfate
– Iron Sucrate
– Iron Humate
– Iron Chelate (5% EDTA)
– Iron Oxide
– Iron Sulfate - Foliar
Rates
– 10 lb Fe / A
– 20 lb Fe / A
Locations
– Citra - Princess
– Jay – Tifgrand
6 weeks
![Page 8: Go Create The Next Great Website!](https://reader033.vdocuments.net/reader033/viewer/2022052707/587c82e81a28abf6368b4cc1/html5/thumbnails/8.jpg)
Site Information
Citra
Princess Bermuda
Trts applied May 7
No prior fertilization
Soil pH 7.2
Turf was not acceptable
at initiation
Jay
Tifgrand Bermuda
Trts applied July 7
Fertilized 4 weeks prior
Soil pH 7.3
Turf was acceptable at
initiation
![Page 9: Go Create The Next Great Website!](https://reader033.vdocuments.net/reader033/viewer/2022052707/587c82e81a28abf6368b4cc1/html5/thumbnails/9.jpg)
Rates
10# Fe / A
Fert w/ 3% Fe applied at
~300# / A
Most applicators use 200-
300# / A with 1-3% Fe
which supplies 2-6# Fe /
A
20# Fe / A
Fert w/ 6% Fe applied at
~300# / A
20# is generally the
highest recommended
![Page 10: Go Create The Next Great Website!](https://reader033.vdocuments.net/reader033/viewer/2022052707/587c82e81a28abf6368b4cc1/html5/thumbnails/10.jpg)
Variables Analyzed
Rapid Laboratory Extraction
Turf Quality
– 1 to 9
Yield
– grams
NDVI
– Normalized difference vegetation index
– Measures natural green color
![Page 11: Go Create The Next Great Website!](https://reader033.vdocuments.net/reader033/viewer/2022052707/587c82e81a28abf6368b4cc1/html5/thumbnails/11.jpg)
Rapid Extraction Setup
![Page 12: Go Create The Next Great Website!](https://reader033.vdocuments.net/reader033/viewer/2022052707/587c82e81a28abf6368b4cc1/html5/thumbnails/12.jpg)
Rapid Lab Extraction
Extr 0 Extr 1 Extr 2 Extr 3 Extr 4
Fe E
xtra
cte
d (
%)
0
50
100
150
200
250
300
350
Sulfate
Sucrate
Humate
Oxide
Chelate
![Page 13: Go Create The Next Great Website!](https://reader033.vdocuments.net/reader033/viewer/2022052707/587c82e81a28abf6368b4cc1/html5/thumbnails/13.jpg)
Cumulative Fe Extracted (%)
313 a
103 b
35 c
4 d 0.5 d 0
50
100
150
200
250
300
350
Chelate Sulfate Humate Sucrate Oxide
![Page 14: Go Create The Next Great Website!](https://reader033.vdocuments.net/reader033/viewer/2022052707/587c82e81a28abf6368b4cc1/html5/thumbnails/14.jpg)
Aerial Photo – Citra week 3
![Page 15: Go Create The Next Great Website!](https://reader033.vdocuments.net/reader033/viewer/2022052707/587c82e81a28abf6368b4cc1/html5/thumbnails/15.jpg)
Turf Quality
Jay - Tifgrand
Days after Fertilization
0 7 14 21 28 35
Turf
Qualit
y4
5
6
7
8
9
10
Control
Sulfate
Sucrate
Humate
Oxide
Chelate
Sulfate-F
Citra - Princess
Days after Fertilization
0 7 14 21 28 35
Tu
rf Q
ua
lity
4
5
6
7
8
9
10
Control
Sulfate
Sucrate
Humate
Oxide
Chelate
Sulfate-F
Initiated May 7, 2014 Initiated July 7, 2014
![Page 16: Go Create The Next Great Website!](https://reader033.vdocuments.net/reader033/viewer/2022052707/587c82e81a28abf6368b4cc1/html5/thumbnails/16.jpg)
Turf Quality
a
b bc bc
bc bc c
4
5
6
7
8
9
Sulfate-F Chelate Sulfate Sucrate Oxide Humate Control
Jay - 16 DAA
![Page 17: Go Create The Next Great Website!](https://reader033.vdocuments.net/reader033/viewer/2022052707/587c82e81a28abf6368b4cc1/html5/thumbnails/17.jpg)
Turf Quality
a
b b b bc bc
c
4
5
6
7
8
Sulfate-F Sucrate Humate Control Chelate Oxide Sulfate
Citra - 4 DAA
![Page 18: Go Create The Next Great Website!](https://reader033.vdocuments.net/reader033/viewer/2022052707/587c82e81a28abf6368b4cc1/html5/thumbnails/18.jpg)
NDVI
Jay - Tifgrand
Days after Fertilization
0 7 14 21 28 35
ND
VI
0.52
0.54
0.56
0.58
0.60
0.62
0.64
0.66
Control
Sulfate
Sucrate
Humate
Oxide
Chelate
Sulfate-F
Citra - Princess
Days after Fertilization
0 7 14 21 28 35
ND
VI
0.52
0.54
0.56
0.58
0.60
0.62
0.64
0.66
Control
Sulfate
Sucrate
Humate
Oxide
Chelate
Sulfate-F
![Page 19: Go Create The Next Great Website!](https://reader033.vdocuments.net/reader033/viewer/2022052707/587c82e81a28abf6368b4cc1/html5/thumbnails/19.jpg)
NDVI
a
ab ab b b
b b
0.56
0.57
0.58
0.59
0.6
0.61
0.62
Sulfate-F Chelate Humate Oxide Control Sulfate Sucrate
Jay - 21 DAA
![Page 20: Go Create The Next Great Website!](https://reader033.vdocuments.net/reader033/viewer/2022052707/587c82e81a28abf6368b4cc1/html5/thumbnails/20.jpg)
NDVI
a a a
ab ab
ab
b
0.56
0.57
0.58
0.59
0.6
0.61
0.62
Sulfate-F Control Humate Chelate Sulfate Sucrate Oxide
Citra - avg
![Page 21: Go Create The Next Great Website!](https://reader033.vdocuments.net/reader033/viewer/2022052707/587c82e81a28abf6368b4cc1/html5/thumbnails/21.jpg)
Yield
Citra - Princess
Days after Fertilization
7 14 21 28 35
Yie
ld (
g)
2
4
6
8
10
12
Control
Sulfate
Sucrate
Humate
Oxide
Chelate
Sulfate-F
Jay - Tifgrand
Days after Fertilization
7 14 21 28 35
Yie
ld (
g)
2
4
6
8
10
12
14
16
18
Control
Sulfate
Sucrate
Humate
Oxide
Chelate
Sulfate-F
![Page 22: Go Create The Next Great Website!](https://reader033.vdocuments.net/reader033/viewer/2022052707/587c82e81a28abf6368b4cc1/html5/thumbnails/22.jpg)
Average Yield (g)
a a a a a a
a
0
10
20
30
40
50
60
Control Sucrate Humate Chelate Oxide Sulfate-F Sulfate
Jay
Citra
![Page 23: Go Create The Next Great Website!](https://reader033.vdocuments.net/reader033/viewer/2022052707/587c82e81a28abf6368b4cc1/html5/thumbnails/23.jpg)
Average Yield (g)
a a a a a a
a
a a a a
a
a a
0
10
20
30
40
50
60
Control Sucrate Humate Chelate Oxide Sulfate-F Sulfate
Jay
Citra
![Page 24: Go Create The Next Great Website!](https://reader033.vdocuments.net/reader033/viewer/2022052707/587c82e81a28abf6368b4cc1/html5/thumbnails/24.jpg)
Discussion
Why are granular Fe sources not
influencing turf response?
– Distribution Uniformity
– Oxidation
Oxidation presentation
![Page 25: Go Create The Next Great Website!](https://reader033.vdocuments.net/reader033/viewer/2022052707/587c82e81a28abf6368b4cc1/html5/thumbnails/25.jpg)
Summary
Chelate and sulfate produced the highest
amounts of extractable Fe
Foliar sulfate increased turf quality on Princess
and Tifgrand
Tifgrand - foliar sulfate and chelate were the
only source that increase turf color
No source influenced yield
![Page 26: Go Create The Next Great Website!](https://reader033.vdocuments.net/reader033/viewer/2022052707/587c82e81a28abf6368b4cc1/html5/thumbnails/26.jpg)
Summary cont.
Granular Fe sources may not provide a
visual response in terms of quality or color
at 10 or 20# Fe / A
Foliar applications should be considered
![Page 27: Go Create The Next Great Website!](https://reader033.vdocuments.net/reader033/viewer/2022052707/587c82e81a28abf6368b4cc1/html5/thumbnails/27.jpg)
Contact Info
Travis Shaddox
University of Florida
Environmental Horticulture
office 352-273-4591
cell 352-262-3426
http://wfrec.ifas.ufl.edu/turfgrass/wp-content/uploads/sites/2/2014/10/FTGA-Iron.pdf