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MAINTENENCEFERTIGATION IN GROW IN
Joel NunesSustainable Turfgrass Managment in Asia
2017 March 6 th, Pattaya, Thailand
URBAN MYTHS ABOUT FERTIGATION
• Can be used in old irrigation systems?• Causes corrosion in material and/or sprinklers?• Can it be used when it rains?• How do we distinguish between areas with different varieties?• How do we know where the fertilizer actually is?• More expensive than granular?
WHAT IS FERTIGATION?
“Fertigation is a great maintenance tool for an effective and uniform application of soil conditioners and/or nutrients on the golf course with very low labor and very reduced costs”
Charles B. WhiteIn Golf Course Construction, Renovation and Grow-in
FERTIGATION SYSTEM
CONTROL SYSTEM
CONTROL SYSTEM
DEPOSITS
Injection Sample recovery
+/- 4 m
Water Flow m3/h
PIPES
pH Control
WHAT LED ME TO THINK IN FERTIGATION?
GOAL
“Joel, we have to open 18 holes in April (2009) and it has to be in great condition!!! What do you think????”
August 2008
THE COURSE
STARTING POINT
Grow-in of 18 holes and 9 holes construction Conditioned labor
Greens USGA Tees: 20 cm box silica sand. Fairways & roughs: 20 cm local sand approved by ETL
High percolation No organic matter and very low CEC
Grow-in October to March Air and soil temperatures very low (bermuda) Short days with low luminosity
FERTILIZATION
Gre
ens
+Tee
s
WHY FERTIGATION?
NitricAcid
Nitro+ Zn
Humi 15 w/
micros
HOW TO EXPLAIN TO YOUR ADMINISTRATION?
Agronomic Financial
LogisticsEnvironment
AGRONOMIC PARAMETERS
Fertilization when ever I want Spoon Feeding Less leaching and volatilization Continuous avaible nutrients for the plant Elimination of burning possibility Control of pH – 6,5 Improvment of soil structure and organic matter (CEC and
microbial soil live) Percolation reduction (study: UALG – Quinta da Ria)
ENVIRONMENT AND LOGISTIC PARAMETERS
No transportation, storage and handling costs; No application costs; No wear in the machines No labor involved; No traffic in the grow-in areas; Less lixiviation allowing less polution.
FINANCIAL PARAMETERS
Fertigation equipment: Approx. 4% of irrigation system Fertilizers (Grow-in):
Humifosfato: 6-15-10+5M.O.+ NitroMais Zn: 30-0-0+0,5Zn
Un
idad
es
de
Nu
trie
nte
s
Produto Preço Kg Nutriente
Lixiviação Preço final
Fert. 15-15-15(20€ Bag 50kg)
0,89€ 40 a 50% 1,78€
Nitro 27%(13€ Bag 50kg)
0,96€ 40 a 50% 1,92€
Humifosfato 15 + Nitromais Zn
(0,40€/kg)1,25€ 5 a 10% 1,37€
Extra Nutrients
0,5% Zn
5% M.O.
Product CostKg Nutrient Leaching Final Cost
Per
Un
ito
fN
utr
ein
t
GROW-IN
Type of Fertilizer
Fertilizationmonth/ha
Price ofFertilization/month.ha
Price ofFetilization /4
months.ha
Price ofFertilization/4 months.50 ha
Nitro 27 +
Granular15-15-15
2 x 200 kgs Nitro 27 +
2 x 200 kgs 15-15-15
(4x13€x2)+(4x20x2) =
264€
264€x4=1056€
1056€x50ha= 52.800€
Humi15 +
NitroMais Zn
150 kgs Humi15 + 300
kgs NitroZn
(150x0,54)+(300x0,34) =
183€183€x4 =732€
732€x50ha= 36.600€
RESULTS
CREEPING BENTGRASS
9 SEPTEMBER 09 22 OCTOBER 09
TALL FESCUE
12 NOVEMBER 09 24 NOVEMBER 09
TALL FESCUE
22 days after seeding
BERMUDA TIFWAY 419
21 October (14 days after planting)
HOLE #4
28 August 09 30 October 09
HOLE #6
1 OCTOBER 30 OCTOBER
HOLE #7
1 OCTOBER 09 30 OCTOBER 09
HOLES #8 & #11
1 OCTOBER 09 30 OCTOBER 09
RESUME
CHANGE AND READAPT
OBRIGADOQuestions?
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