seepage vs. center pivot for snap bean production in florida · 2015-07-22 · seepage vs. center...
TRANSCRIPT
Seepage vs. Center Pivot for Snap Bean Production in Florida
Yuqi Cui, G. David Liu, Lincoln Zotarelli, Crystal A. Snodgrass, and Alan Jones UF-IFAS, Gainesville, FL 32611 Manatee County Extension, IFAS, Palmetto, FL 34221, and Jones Potato Farm, Parrish, FL 34219
INTRODUCTION RESULTS Snap Bean Yield & Quality
MATERIALS & METHODS
Water Usage
Seepage irrigation is the predominant irrigation for snap bean
production in Florida, but poses problems for water
conservation and quality.
Overhead irrigation has significantly greater water-use
efficiency than seepage irrigation, and can be used in snap
bean production.
Objective: to explore the feasibility of converting seepage to
central pivot irrigation for commercial snap bean production in
southwest Florida.
Flow meter
Center pivot irrigation systems can save over 50% of water compared to seepage irrigation. A more suitable fertilization program is required.
CONCLUSIONS
2014-2015 Growing Season
N Level in Soil at Harvest
Water Level
Field Measurements Level logger Rain gauge
Irrigation Variety Area
(ha)
Planting
Date Harvest Date
Seepage Caprice 4 2/18/2014 4/16/2014
Center pivot Caprice 69 2/2/2014 4/8/2014
Seepage irrigation was 0.1-0.2 m higher than center pivot irrigation in water table.
Soil Moisture
Biomass at Harvest
Soil moisture contents in the root-zone (top 12 inches) were greater for center pivot irrigation than for seepage irrigation.
No significant differences in NO3-N concentrations in the surface soil were observed between the seepage and center pivot plots at harvest (P>0.05).
Seepage Center pivot Data logger SPAD meter
ACKNOWLEDGEMENTS
At harvest, plants in seepage plots showed significantly higher dry weight of stems and leaves compared to that in center pivot irrigation plots (P<0.05).
Seepage irrigation showed significantly greater yield and Length/Diameter ratio (P<0.05).
The irrigation water usage for seepage plots was 57% more than center pivot plots. 0
0.5
1
1.5
2
2.5
3
Seepage Center pivot
KCl e
xtra
ctab
le N
O3-
N(m
g/kg
)
Treatment
Seepage Center pivot
0
2
4
6
8
10
12
14
16
Seepage Center pivot
Dry
wei
ght (
g)/p
lant
Treatment
stems leaves pods
a
a
b
b
0
5
10
15
20
Seepage Center pivot
Leng
th/D
iam
eter
Treatment
a b
0
40
80
120
160
200
240
Seepage Center pivot
Yiel
d (k
g/ha
)
Treatment
a
b
110
22 25
149
149
0
50
100
150
200
250
300
Seepage Center pivot
Ove
rall
wat
er u
sage
(mm
)
Treatment
rainfall
pivot
seepage
11%
13%
76%
-1.2
-1.0
-0.8
-0.6
-0.4
-0.2
0.0 2/25 3/2 3/7 3/12 3/17 3/22 3/27 4/1 4/6 4/11 4/16
wat
er le
vel (
m)
Date
Seepage Center pviot
0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45
2/25 3/4 3/11 3/18 3/25 4/1 4/8
Volu
met
ric m
oist
ure
cont
ent
(m3/
m3)
Date
80 cm 50 cm 30 cm 20 cm 10 cm
0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45
2/25 3/4 3/11 3/18 3/25 4/1 4/8 4/15
Volu
met
ric m
oist
ure
cont
ent
(m3/
m3)
Date
This research was financially supported by Southwest Florida Water Management District (13C00000017). We thank Mr. David Fleming and Mr. Jesse Cavillo for helping with the research.
Seepage Center Pivot