nutrient management planning. 2 n nitrogen p phosphorus k potassium ………no 3 nitrate ………p...
TRANSCRIPT
Nutrient Management Planning
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N Nitrogen
P Phosphorus
K Potassium
………NO3 Nitrate
………P2O5 Phosphate
………K2O Potash………
Nutrients needed by grass and crops for growth
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Nutrient Management PlanningGetting the balance right!
Nutrients In
Nutrients Out
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Why manage nutrients?
1. Potential to reduce fertiliser costs
2. Protect the environment
3. Meet Nitrates Directive requirements
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2. Protect the environment
Nutrient loss – phosphates and nitrates
1. Slurry & fertiliser runoff
2. Leaching through the soil
3. Soil particle loss
Causes nutrient enrichment (eutrophication)
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3. Meet Nitrates Directive requirements
• Must show that any chemical P fertiliser used is needed by the crop:– Soil Analysis– P recommendation for the crop
• Must show that any chemical N fertiliser that is used for crops other than grass is needed by the crop:– Soil N supply index– N recommendation for the crop
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Step 1 - Soil sampleStep 2 - What does the soil analysis mean?Step 3 - Estimate Nitrogen requirementsStep 4 - What nutrients does the crop require?Step 5 - How much nutrient can be supplied by
organic manures?Step 6 - Which chemical fertiliser can supply the
remaining nutrients required
C. How is it done?
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Soil
• Valuable source often overlooked.
• Amount of nutrients depends on soil type, rainfall and previous management
• How to find out what’s in soil?− Soil sampling− Soil analysis
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Mr AN Other
Somewhere
Report generated on: 07 March 2008
Date Received: 29 February 2009
pH Texture Lime Requirement Phosphorus Potassium Magnesium
Lab No./
Reference
Arable
t/ha
(t/acre)
Grass
t/ha
(t/acre)
mg/l
(index)
mg/l
(index)
mg/l
(index)
400-2008
Soil
1-19-60 Field 4
6.1 SZL
(Sandy silt loam)
4.00
(2.00)
0.00
(0.00)
20.0
(2)
216
(2+)
102
(3)
Farm Survey & Field Number
pH Texture Lime requirement for arable & Grass
Soil Analysis Laboratory Report
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Soil pH, nutrient availability and plant growth
Plant Growth
Nutrient Availability
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4.5 5.5 6.5 7.5 8.5
Potatoes
Grass
Cereals
Soil pH range for optimum crop growth
pH
Lime is used to improve acidic soils
(raise low pH soils)
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N Requirements for some Arable crops (kg/ha)Pages 68- 69 NAP Guidance Booklet
SNS1 SNS2 SNS3
W. Wheat 220 190 160
W. Barley 170 140 110
W. Oats 120 90 60
W. O.S.Rape 190+30* 160+30* 120
S. Barley 140 110 70
S. Oats 110 70 40
S. Wheat 180 150 120
F. Maize 100 50 20 * +30 in the seedbed
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Step 5 -Nutrient Content of Slurry & Manure (kg/m3)
6% dry matter
2.42.03.0 4% dry matter
3.21.22.3 6% dry matter
3.21.23.0 6% dry matter
K20P205NLivestock Type
181633 Broiler litter (60% Dry Matter)
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This Calculation on paper for Nitrates Records
Page 43
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Crop Nutrient Recommendation Calculator (www.dardni.gov.uk)
• Determine N, P2O5 and K2O required by crops;
• Calculate the amount of nutrients supplied by organic manures,
• Select the correct chemical fertiliser and application rate,
• Retain information required for record keeping.
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AN Other
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AN Other
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How to access calculators?
• Go to dardni website at www.dardni.gov.uk
• If not registered, click New User? Sign up now and follow instructions
• Once registered, click Online Services and select Secure online Services
• Select Farm Nutrient Management Calculators