Growing medium: Rockwool.
Plant population: 35,000 plants/ha.
Expected yield: 40-50 T/Ha.
Growth period |
Weeks |
N |
P |
K |
Ca |
Mg |
---|---|---|---|---|---|---|
--------------------- mg/l -------------------- |
||||||
Planting - Veg |
1-6 |
110 |
33 |
140 |
106 |
50 |
Early prod. |
7-14 |
200 |
90 |
170 |
106 |
50 |
Flowering- Fruit |
15-21 |
150 |
45 |
100 |
85-110 |
50 |
Fruit - Set-rip |
22-25 |
120 |
20 |
100 |
85-110 |
30 |
Harvesting |
26-33 |
100 |
20 |
100 |
85-110 |
30 |
Harvesting |
34-35 |
100 |
20 |
100 |
85-110 |
30 |
Harvesting |
36-39 |
70 |
17 |
80 |
65-110 |
30 |
pH |
EC ms/cm |
NH4/(NO3+NH4) |
---|---|---|
5.5-6.5 |
1.5-2.0 |
1/10 |
The calculation of nutrient solution composition is based on the following water parameters:
Ca - 80 mg/l
Mg - 12 mg/l
HCO3 - 80 mg/l
EC - 0.5 ms/cm
Growth period |
Weeks |
Tank A |
Tank B |
||||
---|---|---|---|---|---|---|---|
AN |
Mg(NO3)2 |
Ca(NO3)2 |
|||||
------------------ Kg ------------------ |
------ Kg ------ |
||||||
Planting - Veg |
1-6 |
- |
50 |
30 |
30 |
40 |
30 |
Early prod. |
7-14 |
55 |
60 |
40 |
30 |
40 |
30 |
Flowering - Fruit |
15-21 |
60 |
30 |
30 |
10 |
40 |
0* |
Fruit - Set-rip |
22-25 |
45 |
45 |
10 |
10 |
15 |
0 |
Harvesting |
26-33 |
30 |
45 |
10 |
10 |
15 |
0 |
Harvesting |
34-35 |
30 |
45 |
10 |
10 |
15 |
0 |
Harvesting |
36-39 |
15 |
45 |
10 |
10 |
15 |
0 |
Notes:
1. The tank volumes are 1000 liter.
2. The stock solutions are injected to the pipeline at a rate of 5 l/m3.
3. 20 ml/m3 of nitric acid are applied to the irrigation solution in each of the growth periods as an additional nitrate-nitrogen source.
4. If the pH of the nutrient solution is higher than recommended (Table B- above) the pH can be corrected by phosphoric acid. In this case the amount of the phosphatic fertilizers should be reduced accordingly.
* The supply of calcium is stopped at this stage assuming sufficiently high level of
calcium in the water (see above).
Parameter |
Concentration |
|||
---|---|---|---|---|
Peat substrate |
Recirculating water |
|||
Nutrient Solution |
Root Environ. |
Nutrient Solution |
Root Environ. |
|
EC (mS/cm) |
1.7 |
0.8 |
1.5 |
2.0 |
(mg/l) |
(mg/l) |
|||
NH4 |
18.0 |
< 9.0 |
9.0 |
< 9.0 |
N- NH4 |
13.8 |
< 6.9 |
6.9 |
< 6.9 |
K in sap | ||||
K |
215.1 |
74.3 |
205.3 |
176.0 |
Ca |
130.3 |
68.2 |
110.3 |
180.5 |
Mg |
30.4 |
17.0 |
27.3 |
48.6 |
N, total | ||||
NO3 |
713.0 |
248.0 |
620.0 |
744.0 |
N-NO3 |
160.9 |
56.0 |
140.0 |
167.9 |
S, total | ||||
SO4 |
144.2 |
105.7 |
108.1 |
240.3 |
P | ||||
H2PO4 |
97.0 |
29.1 |
121.3 |
67.9 |
Cl | ||||
Na | ||||
Fe |
1.117 |
0.447 |
1.117 |
1.955 |
Mn |
0.549 |
0.110 |
0.549 |
0.385 |
Zn |
0.458 |
0.196 |
0.262 |
0.458 |
B |
0.270 |
0.108 |
0.216 |
0.216 |
Cu |
0.048 |
0.044 |
0.048 |
0.044 |
Mo |
0.048 |
- |
0.048 |
- |
Important note: The a/m database was prepared to fit Dutch conditions (low transpiration and low EC of the water). Considerable and proportional reduction in the concentration of the macronutrients should be required to offset for lower quality water prevailing in other conditions.
sources:
Open Ground Pre Plant fertilisers
The texture and nutritional status of the soil influence strawberry nutritional requirements. Lighter soils tend to leach Nitrogen and Potassium more easily than medium and heavier soils, likewise for tabletop and gutter production, substrates can be either Vapoboards, Grodan and Growbags (Peat, Peat/ Polymer and Peat /Clay). The nutritional application programme must be tailored accordingly to the type of substrate.
All figures in kg/ha of P2O5, K2O and MgO.
Notes:
Source: Dennis Wilson - Strawberry Handbook 1997.
Index |
0 |
1 |
2 |
3 |
4 |
---|---|---|---|---|---|
P2O5 |
200 |
100 |
75 |
50 |
- |
K2O |
200 |
100 |
50 |
- |
- |
MgO |
100 |
75 |
50 |
25 |
- |
Many different liquid and water soluble fertilizers are marketed for soft fruit production, the major products are listed below. Products range from cheaper formulations with poor quality agricultural grade materials. Whilst cheaper, these products contain high levels of insoluble which can cause blockages to irrigation lines and T-Tape. Cheaper products with a high Chloride content may also cause root scorch and cause increased problems with soft watery fruits.
At the top end of the market a higher quality raw material is used, this results in higher purchase prices but guarantees improved solubility, reduced Chlorine contents and better water quality.
Source: Dennis Wilson - Strawberry Handbook 1997.
N |
P2O5 |
K2O |
MgO |
No Weeks |
|
---|---|---|---|---|---|
Junebearers | |||||
- Tunnels |
60 |
30 |
120 |
15 |
20-24 |
- Maincrop Yr. 1 |
50 |
25 |
100 |
10 |
16-20 |
Final Yr |
40 |
20 |
80 |
8 |
10-12 |
- 60 days |
40 |
20 |
80 |
8 |
12-15 |
Everbearers |
60-75 |
30 |
120 |
15 |
20-24 |
Notes:
a) Elsanta. |
||||||
---|---|---|---|---|---|---|
Timing |
No. of weeks |
N |
P2O5 |
K2O |
MgO |
|
Tunnels |
Apr-Sept |
24 |
60 |
301 |
50 |
18 |
Fleece |
May / Sept |
22 |
60 |
30 |
150 |
15 |
Maincrop | ||||||
* Year 1 |
May / Sept |
20 |
60 |
30 |
120 |
12 |
* Final year |
May / June |
10 |
40 |
20 |
80 |
10 |
Deep straw |
May / July |
10 |
50 |
25 |
100 |
10 |
60 day crops |
June-Sept |
15 |
50 |
25 |
100 |
10 |
b) Everbearers. | ||||||
Year 1 | ||||||
* Bolero |
June-Sept |
16 |
60 |
30 |
120 |
12 |
* Everest/Selva |
May-Sept |
20 |
75* |
30 |
120 |
12 |
* Everglade |
May-Sept |
20 |
80 |
40 |
160 |
16 |
Year 2 | ||||||
* Everest |
May-Sept |
20 |
75 |
38 |
150 |
15 |
Notes:
Nitrogen
N should be supplied at 1.5 – 2.5 kg N / ha /day.
Soil solution should contain 20-30 ppm of nitrate-N at all times.
Phosphorus
P should be kept at 20-30 ppm (Olsen)
Potassium
K should be kept at 1-2 mEq/liter.
Soil: medium - heavy.
Plant density: 35,000 plants/ha.
Expected yield: 37-50 T/Ha.
N |
P2O5 |
K2O |
---|---|---|
----------- kg/ha ----------- |
||
150-218 |
112-130 |
218-250 |
Growth stage |
Suggested fertilizers |
Rate (kg/ha) |
N |
P2O5 |
K2O |
---|---|---|---|---|---|
----------(kg/ha)---------- |
|||||
Planting – 2 months |
Urea |
63 |
29 |
0 |
0 |
63 |
7 |
37 |
0 |
||
82 |
10 |
0 |
37 |
||
Flowering – fruit-set |
Urea |
81 |
37 |
0 |
0 |
MAP |
31 |
4 |
19 |
0 |
|
Multi-K |
113 |
15 |
0 |
52 |
|
Fruit-set - harvest |
Urea |
125 |
58 |
0 |
0 |
MAP |
50 |
6 |
30 |
0 |
|
Multi-K |
218 |
28 |
0 |
100 |
|
Late harvest |
Multi-K |
125 |
16 |
0 |
58 |
Total |
1,076 |
210 |
86 |
247 |
Growth stage |
Fertilizer |
Rate (%) |
Number of applications and frequency |
---|---|---|---|
Vegatative |
0.4 |
4, at weekly intervals |
|
Start of flowering |
0.3-0.4 |
4, at weekly intervals |
For extensive growth conditions
N |
P2O5 |
K2O |
CaO |
MgO |
---|---|---|---|---|
150 |
150 |
240 |
120 |
60 |
Need more information about growing strawberries? You can always return to the strawberry fertilizer program & strawberry crop guide table of contents