Haifa's fertilization & fertigation recommendation for growing onions with Haifa fertilizers, to achieve optimal plant nutrition and excellent yield
Situation A
Growing medium: Open field.
Soil type: Light.
Plant population: 200,000-400,000 Plants/Ha.
Expected yield: 40-60 T/Ha (85% moisture).
|
N |
P2O5 |
K2O |
|---|---|---|
|
---------------- Kg/Ha ----------------- |
||
|
100-200 |
100-200 |
200-300 |
Base dressing
|
Nutrient demand |
Recommended fertilizers |
|||||
|---|---|---|---|---|---|---|
|
N |
P2O5 |
K2O |
MgO |
SSP |
||
|
-------------- Kg/Ha -------------- |
-------------- Kg/Ha -------------- |
|||||
|
37 |
120 |
90 |
16 |
200 |
650 |
100 |
Due to shallow root system the fertilizers should be banded 8-10 cm below the seed row.
Fertigation
|
Weeks after transplanting |
Nutrient requirements |
Recommended fertilizers |
|||||
|---|---|---|---|---|---|---|---|
|
N |
P2O5 |
K2O |
Ca |
AN |
|||
|
-------------- Kg/Ha -------------- |
-------------- Kg/Ha -------------- |
||||||
|
2-6 |
14 |
0.9 |
40 |
4.5 |
|||
|
8-12 |
6.5 |
23 |
50 |
||||
High nutrient availability is required during the bulbification.
AN = Ammonium nitrate (34% Nitrogen)
Multi-K = Potassium nitrate (13-0-46)
SSP = Single Superphosphate (19% P2O5)
Magnisal = Magnesium nitrate ( 10.8-0-0-+15.7MgO)
Situation B
Growing medium: Open field.
Soil type: Light to medium.
Plant population: 800,000-1,000,000 Plants/Ha.
Expected yield: 65-70 MT/Ha (85% moisture).
Recommended average rates of nutrients for onions
|
N |
P2O5 |
K2O |
|---|---|---|
|
---------------- Kg/Ha ----------------- |
||
|
170-200 |
200-300 |
400-500 |
Base dressing
|
Nutrient demand |
Recommended fertilizers |
|||||
|---|---|---|---|---|---|---|
|
N |
P2O5 |
K2O |
MgO |
SSP |
||
|
-------------- Kg/Ha -------------- |
-------------- Kg/Ha -------------- |
|||||
|
85 |
270 |
300 |
37 |
600 |
1400 |
230 |
Multi-K - Potassium nitrate (13% N and 46% K2O).
SSP - Single Superphosphate (19% P2O5).
Side-Dressing
|
N |
K2O |
Multi-K |
Ammonium Nitrate |
Calcium nitrate |
|
|---|---|---|---|---|---|
|
Developmental stage |
(Kg/Ha) |
(Kg/Ha) |
(Kg/Ha) |
(Kg/Ha) |
(Kg/Ha) |
| 2 weeks after transplanting |
30 |
70 |
150 |
0 |
0 |
| Bulb filling |
60 |
70 |
150 |
20 |
150 |
Note: It is recommended not to apply nitrogen after the bulb is 2/3 of its expected final size.
Multi-K - Potassium nitrate (13% N and 46% K2O).
Calcium nitrate (15.5% N and 20% Ca).
Need more information about growing onions? You can always return to the onion fertilizer & onion crop guide table of contents