container plant irrigation considerations
DESCRIPTION
Container Plant Irrigation Considerations. Tom Yeager Department of Environmental Horticulture. Apply Irrigation Uniformly as the Amount Needed. Application Amount. Distribution Uniformity. What impacts the uniformity of delivery?. Overhead sprinkler. Design: spacing. - PowerPoint PPT PresentationTRANSCRIPT
Container PlantIrrigation Considerations
Tom YeagerDepartment of Environmental Horticulture
Apply Irrigation Uniformly as the Amount Needed
Application AmountDistribution Uniformity
What impacts the uniformity of delivery?
Overhead sprinkler
Design: spacing
Design: spacing
Take into account slope
2.31 ft = 1 psi
Design: pressure
Pressure loss due to friction for 100 ft Sch. 40 PVC pipe
Design: pressure
Pipe Size (inch)
Flow(GPM)
Press. Loss(PSI)
1.0 12 3.4
2.0 12 0.1
4.0 12 0.0
R em ove obstructions
inside and in front
of em itters
Remove obstructions
inside and in front
of emitters
Maintenance
Monitor uniformity and application amount
Monitor uniformity and
application amount
53566166
47495761
42435053404148
81616 5149
48 49
56
57 49
61
61
66
43
41
50 53
47
53
40
42
53566166
47495761
42435053404148
81616 5149
48 49
56
57 49
61
61
66
43
41
50 53
47
53
40
42
Calculation for Uniformity
40+41+42+43 = 166 = 414
Distribution Uniformity Overall average (ml)
Low quarter average (ml)=
0.80 = 80% DU=4151
166
Convert Volume to Application Depth
Average volume applied =
= 0.9 cm
Cup area = 3.14 x 4.25 2 = 57 cm2
51 ml or cm3
= 0.4 inch2.54 cm/ inch
0.9 cm
= 0.4 inch51 ml or cm3
57 cm2
51 cm3
57 cm2
Determine distribution of water over the areaAmount applied per duration of irrigation
Application AmountDistribution Uniformity
http://edis.ifas.ufl.edu/ep458
Summary
Match Water Demand with Application Amount
Overhead sprinkler
Are there differences inwater demand?
Species
Salmon’s Nursery, FLPodocarpus 0.33Rhaphiolepis 0.35Rosa 0.38Loropetalum 0.39Ilex 0.44 Rhododendron 0.47Viburnum 0.53
0.14
Saunder’s Nursery, VARhododendron 0.32Spiraea 0.33Weigela 0.35Hydrangea 0.38Gardenia 0.39 Berberis 0.50
0.07
Plant water demand or loss (inch/container)July August3- gal
Can you manage for the species differences?
Are there differences inwater demand?
Calculation for Uniformity
Overall average (inch)
Low quarter average (inch) Distribution Uniformity
=
0.65 = 65% DU=0.260.40
0.40 – 0.14 = 0.26
Overall Average – variation between species =
number to exceed so sprinkler variation does not overcome species variation
Are there differences inwater demand?
Species
Spacing
Spacing (inch)0369
Water loss (inch)0.300.330.360.400.10
Container Water Loss for 3-gal Ligustrum
Spacing (inch)0246
Water loss (inch)0.320.380.420.450.13
June July
Million and Yeager, SNA 2013
Spacing 0 inch 5.5 inch 11 inch 16.5 inch
% Cover 95 52 35 24
Wt. loss (g) 400 520 ( 30%) 570 ( 45%) 610 ( 50%)
ETc (inch) 0.25 0.33 0.36 0.39
Light interception per
plant
Temp.
20
40
60
80
100
120
Substrate - Wide Spacing
Substrate - Close Spacing
Air
Tem
per
atu
re (
F)
Jan 10 Jan 11 Jan 12 Jan 13
Hourly measurements
Dwarf Yaupon 1-Gallon 2013
Are there differences inwater demand?
Species
Spacing
Size
Plant Water Demand Affected by Plant Size1-gal Viburnum - spring planting
0 14 28 42 56 70 84 98 1120.0
0.2
0.4
0.6
0.8
1.0
0
2
4
6
8
10
12
14
16
18
20
Water loss
Size index
Day
Wat
er l
oss
(in
ch) S
ize ind
ex (cm)
Match Water Demand
Overhead sprinkler
With Application Amount
Species
Spacing
Size
Capture Factor (CF) =
Volume captured
Volume captured
Canopy Affects Capture of Irrigation and Rain
Match Water Demand
Overhead sprinkler
With Application Amount
Species
Spacing
Size
Capture Factor
How Do We Use This and Other Information?
Match Water Demand with Application Amount
Thanks for Your Support!
Center for Applied Nursery Research
Florida Nursery, Growers and Landscape Association
Saunders Brothers Nursery
Salmon’s Wholesale Nursery
Southwest Florida Water Management District
