10/04/2011 1 Fertilization, even in Norway Fertilization-mid April Starting amount must be high enough Variation from 3-5 kg pure N/daa on the tree strips Depending on variety and the need for extra power Too much growth we handle by root pruning, not with less nitrogen Nitrogen must be in an 50% ammonium + 50% nitrate fertilizer Weaker trees close to flowering an extra treatment, same amount and more often per season Fertilization-mid April Possible to give in a N+P+K fertilizer but… Some varieties need more K; Discovery, Elstar, Summerred and pears Some should get less (Åkerø) after or at a low crop P about 1-2 kg / daa per year, K from 5-15 kg /daa /year Extra K you can do with Kalimagnesia on the tree strips
Transcript
10/04/2011
1
Fertilization, even in Norway
Fertilization-mid April
Starting amount must be high enough
Variation from 3-5 kg pure N/daa on the tree strips
Depending on variety and the need for extra power
Too much growth we handle by root pruning, not with less nitrogen
Nitrogen must be in an 50% ammonium + 50% nitrate fertilizer
Weaker trees close to flowering an extra treatment, same amount and more often per season
Fertilization-mid April
Possible to give in a N+P+K fertilizer but…
Some varieties need more K;Discovery, Elstar, Summerred and pearsSome should get less (Åkerø) after or at a low crop
P about 1-2 kg / daa per year, K from 5-15 kg /daa /year
Extra K you can do with Kalimagnesia on the tree strips
10/04/2011
2
April 8, 2011 full flowering
Nitrogen fertilization spring
Give 3- 4 kg N/daa on the tree strips start - mid April- must come net on the tree strips / within root pruned area
Pears often 4- 5 kg pure N /daa on the tree strips, Especially after root pruning a bit (20-30%) extra Nitrogen
• use a 50% ammonium + 50% nitrate fertilizercombination with Phosphate is possible
Weak growing trees / varieties close(r) to flowering again a Nitrogen treatment (+ 2 lt. Humifirst / daa)
Fertilization in spring
• preferable separate Kali / Potassium treatment (+Mg)• 15 - 30 kg Patentkali / Kalimagnesia / daa for apples
is about 3,7 – 7,5 kg pure K / daa
• 30 - 50 kg Patentkali/ daa for pearsis about 7,5 – 12,5 kg pure K / daa
• Patentkali gives Kali, Magnesium and sulphates
then you can react on the different soils, varieties, growth and the amount of flowerbuds
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April 8, 2011 full flowering
Foliar feeding = top dressing?
• More Kalium-Plus & Wuxal Microplant (frost)• Gives a better leaf development / resistance2-3 times 0,1 lt. Wuxal Microplant/daa raises copper
level
anti stressors, gives a push to the growth/ leaf development / condition of trees / flowers
• Kalium-Plus cheaper than Resistim• 0.15 lt. Kalium–Plus versus 0.2 lt. Resistim
Foliar sprays keeps flowers & pollen vital a longer time
• This we name the
X moment
• Look at POLpro
Has pollination take place?
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Foliar feeding = necessary!
Low uptake due cold soil, low root activity
Foliar feeding makes a good pollination-fruit setting much more sure
Underestimated effect by too many growers!!
Not the total number of flowerbuds makes your crop
The quality due feeding and light that makes the crop!
Fertilization-
fertigation
In dryer periods very helpfully
Just a bit extra N + water can prevent
re-growth
Installations must be ready now, Dosatron/ Mixrite or pump injectors,
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Basic schedule fertigation
� Start in a low level nitrogen to avoid mistakes
� 0,1-0.15 gram N/ meter planting distance/day
� Gives about 0,9-0,13 kg nitrogen/ month /daa or 0,21-0,325 kg nitrogen per week
� This at a normal basic nitrogen soil treatment
Basic schedule fertigation
� per 1.000 litre stock solution for 0,15 gram N/meter:
(this with 1,6 litre water /meter / day) pH soil >6
