p k
Post on 20-Mar-2016
45 Views
Preview:
DESCRIPTION
TRANSCRIPT
N
P K
SS
Ca Mg
FeFe
B Cl Cu Mn Mo Zn
Essential Essential Turfgrass Turfgrass NutrientsNutrients
NitrogenNitrogen Organic Matter Organic Matter
(O.M.)(O.M.)
FertilizersFertilizers
Nitrogen RequirementsNitrogen RequirementsGrassGrass Lbs. N/1,000 Lbs. N/1,000
ftft22/Yr/Yr
Common bermudaCommon bermuda 4 - 54 - 5Hybrid bermudaHybrid bermuda 5 - 65 - 6St. Augustine (Sun)St. Augustine (Sun) 3 - 43 - 4St. Augustine (Shade)St. Augustine (Shade) 2 - 32 - 3ZoysiaZoysia 2 - 32 - 3Tall FescueTall Fescue 3 - 43 - 4BuffalograssBuffalograss 1 - 21 - 2CentipedegrassCentipedegrass 1 - 21 - 2
Nitrogen SourcesNitrogen Sources
Soluble NitrogenSoluble Nitrogen
Slow Release NitrogenSlow Release Nitrogen
Organic NitrogenOrganic Nitrogen
Soluble Nitrogen Soluble Nitrogen SourcesSources
UreaUrea
Ammonium SulfateAmmonium Sulfate
Potassium NitratePotassium Nitrate
Ammonium NitrateAmmonium Nitrate
Slow ReleaseSlow ReleaseNitrogen SourcesNitrogen Sources
Urea — formaldehyde (UF)Urea — formaldehyde (UF)
Isobutylidene diurea (IBDU)Isobutylidene diurea (IBDU)
Sulfur coated urea (SCU)Sulfur coated urea (SCU)
Polymer coated nitrogenPolymer coated nitrogen
Organic FertilizerOrganic Fertilizer
A material containing carbon A material containing carbon and one or more elements other and one or more elements other than hydrogen and oxygen than hydrogen and oxygen essential for plant growthessential for plant growth
Example: Natural Based FertilizerExample: Natural Based FertilizerChuck’s GreeneryChuck’s Greenery 100% Natural Based Fertilizer100% Natural Based Fertilizer
14 - 2 - 414 - 2 - 4 81% Natural Organic 81% Natural Organic
7% Natural Inorganic (Mineral)7% Natural Inorganic (Mineral)
Per 100 lbs. by WeightPer 100 lbs. by Weight % of the Nutrients% of the Nutrients
12 lbs. Urea12 lbs. Urea 40% of the N40% of the N54 lbs. Feather Meal54 lbs. Feather Meal 50% of the N50% of the N
12 lbs. Blood Meal12 lbs. Blood Meal 10% of the N10% of the N
15 lbs. Bone Meal15 lbs. Bone Meal 100% of the P100% of the P22OO55
7 lbs. Sulfate of Potash7 lbs. Sulfate of Potash 100% of the K100% of the K22OO
Factors AffectingFactors AffectingNutrient AvailabilityNutrient Availability
Oxidation = reduction state of the nutrientOxidation = reduction state of the nutrient FE FE +2+2, Fe , Fe +3+3
Concentration of the nutrientConcentration of the nutrient Water content of soilWater content of soil OxygenOxygen TemperatureTemperature pHpH
NitrificationNitrificationNHNH44
++ + O + O22 NONO22--
NONO22 + O + O22 NONO33--
Concentration of the nutrientConcentration of the nutrient Water content of soilWater content of soil OxygenOxygen TemperatureTemperature pHpH
Nitrate (NO3-) is lostNitrate (NO3-) is lostfrom soil by:from soil by:
LeachingLeaching Soil microorganismsSoil microorganisms Taken up by grassTaken up by grass DenitrifiedDenitrified
DenitrificationDenitrificationNONO33
-- NONO22-- NN22OO NN22
Occurs under the following conditions:Occurs under the following conditions:
Low oxygen concentrationLow oxygen concentration High soil moistureHigh soil moisture Alkaline soilsAlkaline soils High temperaturesHigh temperatures
top related