Crop Guide: Plant Care & Fertigation

Index

1. Open-field using granular N-P-K fertilizers
2. Open-field using fully water soluble N-P-K fertilizers and fertigation setup
3. Nutrigation™ (fertigation)*
4. Greenhouse and tunnels
5. Nutrigation™ (fertigation) – by QUANTITIVE* delivery
6. Nutrigation™ (fertigation) – by PROPORTIONAL* delivery
7. Soilless grown
8. Haifa NutriNet™ web software for Nutrigation™ programs
9. Open-field grown cucumbers on loam (medium) texture soil
10. Open-field grown cucumbers, for processing, on clay (heavy) texture soil
11. Tunnel grown cucumbers on loam (medium) texture soil
12. Greenhouse grown cucumbers on sandy (light) texture soil

 

5.1 Fertilizers recommendations for a variety of growth conditions

5.1.1 Open-field using granular N-P-K fertilizers

Plant density: 30,000 – 40,000 / ha

Expected yield: 25 – 35 ton / ha

 

 

 

Pre-plant application

Nutrient Demand(kg/ha)*				Suggested Fertilizers(kg/ha)*
N	P2O5	K2O	MgO	AN	SSP	SOP	MgSO4
85	150	270	50	256	750	540	300

AN = Ammonium Nitrate (33.5-0-0)

SSP = Single Super Phosphate (0-20-0)

SOP = Sulfate of Potash (0-0-50)

*CaO = may be required if soil and water are low in calcium

 

 

Side dressing

Table 5.1: Nutrients demand and recommended fertilizers for side-dressing of open-field cucumbers

Growth stage	Nutrient Demand(kg/ha/stage)				Recommended Granular N-P-K-Mg Fertilizers (kg/ha/stage)
	N	P2O5	K2O	MgO	18-18-18	20-3-20	12-0-42+4MgO
Vegetative development	50	50	50	5	280	-	-
Flowering – fruit-set	50	10	50	0	-	250	-
Production	70	0	230	20	-	-	2 x 275*
Total	170	60	330	25	280	250	550

*2 applications of 275 kg/ha each, at 10 days interval.

 

5.1.2 Open-field using fully water soluble N-P-K fertilizers and fertigation setup

Plant density: 30,000 – 40,000 / ha

Expected yield: 40 – 50 ton / ha

 

When fields are equipped with fertigation setup, Nutrigation™ (fertigation) is recommended (for details see the relevant paragraph on page 21). When fertilizers are properly soil applied and Nutrigated, the expected yield may be increased by app. 80% as compared to the application of granular fertilizers, to around 40 – 50 t/ha.

 

 

Pre-plant application

Nutrient Demand(kg/ha)			Suggested Fertilizers(kg/ha)
N	P2O5	K2O	AN	SSP	SOP
60	160	200	180	800	400

AN = Ammonium Nitrate (33.5-0-0), SSP = Single Super Phosphate (0-20-0),

SOP = Sulfate of Potash (0-0-50),

CaO = may be required if soil and water are low in calcium.

 

Nutrigation™ (fertigation)*

Table 5.2: Nutrients demand and recommended fertilizers for Nutrigation™ of open-field cucumbers

Growth stage	Nutrient Demand (kg/ha/stage)				Recommended Fertilizers (kg/ha/stage)
	N	P2O5	K2O	MgO	Multi-K™	Haifa MAP™	AN	Magnisal™
Vegetative development	40	10	60	10	130	16	42	60
Flowering –Fruit-set	70	20	140	40	300	33	-	250
Production	80	20	200	30	430	33	-	190
Total	190	50	400	80	860	82	42	500

*The fertilizers should be applied every 1 – 2 irrigation cycles.

 

Multi-K™ = Potassium nitrate (13-0-46),

Haifa MAP™ = Mono-ammonium Phosphate, technical grade (12-61-0),

AN = Ammonium Nitrate (33.5-0-0),

Magnisal™ = Magnesium nitrate (11-0-0-16MgO)

CaO = may be required if soil and water are low in calcium.

 

5.1.3 Greenhouse and tunnels

A – Soil grown

Plant density: 18,000 – 24,000 / ha

Expected yield: 120 – 150 ton / ha

Total nutrients application(kg/ha)
N	P2O5	K2O	MgO
300	240	700	100

CaO = may be required if soil and water are low in calcium

 

 

Pre-plant application

Nutrient demand(kg/ha)			Suggested fertilizers(kg/ha)
N	P2O5	K2O	AN	SSP	SOP
60	160	200	180	800	400

AN = Ammonium Nitrate (33.5-0-0), SSP = Single Super Phosphate (0-20-0),

SOP = Sulfate of Potash (0-0-50),

CaO = may be required if soil and water are low in calcium.

 

i. Nutrigation™ (fertigation) – by QUANTITIVE* delivery

Table 5.3: Nutrients demand and recommended fertilizers for quantitative Nutrigation™ of soil-grown, greenhouse cucumbers

Growth stage	Nutrient Demand(kg/ha/stage)				Recommended Fertilizers(kg/ha/stage)
	N	P2O5	K2O	MgO	Multi-K™	Haifa MAP™	AN	Magnisal™
Establishment	40	10	60	10	130	16	42	60
Vegetative development	70	20	140	40	300	33	-	250
Flowering – fruit-set	80	200	200	30	430	33	-	190
Production	50	20	100	20	215	33	-	190
Total	240	70	500	100	1075	115	42	690

*The application rate is based and a quantity per area regardless of the concentration in the irrigated water.

The fertilizers should be applied every 1-2 irrigation cycles.

Multi-K™ = Potassium nitrate (13-0-46),

Haifa MAP™ = Mono-ammonium Phosphate (12-61-0),

AN = Ammonium Nitrate (33.5-0-0),

Magnisal™ = Magnesium nitrate (11-0-0-16MgO)

 

 

Calcium

In case of soils low in calcium this plant nutrient should be applied from fruit-set until the end of harvest. Rates should be adjusted according to the concentration in the soil and irrigation water.

Total requirement rate = 2–4 kg/ha/day CaO, which can be applied as 11.5 kg/ha/day of Haifa Cal™ 15.5-0-0-26CaO.

 

ii. Nutrigation™ (fertigation) – by PROPORTIONAL* delivery

Table 5.4: Nutrients demand and recommended fertilizers for proportional Nutrigation™ of soil-grown, greenhouse cucumbers

Growth stage	Assumptions		Nutrient Demand(kg/m3)				Recommended  Fertilizers(kg/m3)
	No. of days/ stage	Irrigation rate (m3/ha/day)	N	P2O5	K2O	MgO	Multi-K™	Haifa MAP™	AN	Magnisal™
Establishment	25	25	0.06	0.02	0.10	0.02	0.21	0.03	0.07	0.1
Vegetative development	30	40	0.06	0.02	0.12	0.03	0.25	0.03	0	0.21
Flowering – fruit-set	30	55	0.05	0.01	0.12	0.02	0.26	0.02	0	0.12
Production	25	60	0.03	0.01	0.07	0.01	0.14	0.02	0	0.13

*The concentration of applied plant nutrients is unchanged and is constant during the entire irrigation cycle.

The fertilizers should be applied every 1 – 2 irrigation cycles

Multi-K™ = Potassium nitrate (13-0-46),

Haifa MAP™ = Mono-ammonium Phosphate (12-61-0),

AN = Ammonium Nitrate (33.5-0-0),

Magnisal™ = Magnesium nitrate (11-0-0-16MgO)

CaO may be required if soil and water are low in calcium.

 

B - Soilless grown

Cucumber can be grown in greenhouses on soilless media, such as perlite, Rockwool, peat, etc. When growing cucumbers on soilless media, special care must be taken in monitoring the nutrients that the crop receives, as there is no soil to compensate for the spent nutrients.

 

The following factors should be taken in account:

• pH: The pH in the nutrient solution should be maintained at 5.5 – 6.5. The pH can be lowered by the use of acids. Adjustment of pH levels can be accomplished by slight changes in nitrate/ammonium ratio in the nutrient solution.
• Electrical Conductivity (EC): The EC of the nutrient solution and the root zone should not exceed 2.2 and 3.0 dS/m, respectively. The difference between the EC of the nutrient solution and the drain water should not exceed 1.5 – 2.0 dS/m (depending on the properties of the water supply).
• Nitrate (NO3): The level of nitrate in the drain water should be 200 – 300 ppm depending on the nitrate level, which changes according the growth stage.
• Nitrate/Ammonium ratio should not be lower than 5:1.
• Nitrite (NO2): The level of nitrite should be zero, because its presence in the growth medium impairs root functioning.
• Ammonia (NH3) and ammonium (NH4): high level of either ammonia or ammonium interferes with the ability of the roots to absorb K.

Figure 5.1: Crop Load on Beit Alpha Cucumber (cv. Sarig), in greenhouse cucumbers.

 

 

Table 5.5: Nutrition database for greenhouse-grown cucumbers under Dutch growing conditions:

Parameter	Concentration
	Rockwool		Rockwool (reuse drainage)		Plant – dry matter (7-8%)
	Nutrient Solution	Root Environ.	Nutrient Solution	Root Environ.	Guiding Range	Deficient	Excessive
EC (mS/cm)	2.2	3.0	1.7	3.0
	Concentration (mg/l)				(%)
NH4	22.5	9.0	18.0	9.0
K in sap					0.59 –0.63	0.18
K	312.8	312.8	254.2	312.8	3.13 – 3.91	2.35
Ca	160.4	260.7	110.3	260.7	2.41 – 3.21	1.20
Mg	33.4	72.9	24.3	72.9	0.36 – 0.73	0.37
N, total					4.20 – 5.60
NO3	992.0	1116.0	728.5	1116.0	1.86
S, total					0.32
SO4	132.1	336.4	96.1	336.4
P					0.62 – 0.93	0.47
H2PO4	121.3	87.3	121.3	87.3
Si	21.1	16.9	21.1	16.9
Na					0.06 – 0.07
	Concentration mg/L or ppm)				mg/Kg (ppm)
Fe	0.838	0.838	0.838	1.396	83.8 – 111.7
Mn	0.549	0.385	0.549	0.385	54.9 – 164.8		> 549.3*
Zn	0.327	0.458	0.327	0.458	49.0 – 143.8	26.1
B	0.270	0.054	0.270	0.540	54.0 – 75.6	43.2	> 108.0
Cu	0.048	0.095	0.048	0.095	10.2	8.9**
Mo	0.048	-	0.048	-	0.96 – 9.59	0.29

*in old leaves

**in young leaves; in old leaves deficient at Cu 5.08 mg/kg DM

Important note: The above-mentioned database was prepared to fit Dutch conditions. Minor modifications may be required to correspond to your local conditions.

 

 

Table 5.6: Fertigation of soilless grown cucumbers during establishment to flowering stage

Growth stage   Establishment – Flowering	Nutrients concentration in the irrigation water(g/m3=ppm)					Recommended fertilizers (g/m3)
	N*	P	K	Ca	Mg	Multi-K™	Haifa MKP™	AN	CN	Magnisal™
Requirement	150	45	220	100	40
Contents in water**	-	-	-	100	20
Addition by fertilizers	150	45	220	-	20	420	200	220	-	210

* 80-90% as NO3^-, 10-20% as NH4⁺

**Based on content in irrigation water 100 ppm Ca and 20 ppm Mg.

 

 

Table 5.7: Soilless fertigation of cucumbers during fruit-set to production stage

Growth stage Fruit-set – Production	Nutrients concentration in the irrigation water(g/m3=ppm)					Recommended fertilizers (g/m3)
	N*	P	K	Ca	Mg	Multi-K™	Haifa MKP™	AN	CN	Magnisal™
Requirement	200	50	330	140	70
Content in water**	-	-	-	100	20
Addition by fertilizers	200	50	300	40	50	690	220	100	210	400

* 80-90% as NO3-, 10-20% as NH4+

** Based on content in irrigation water 100 ppm Ca and 20 ppm Mg.

Multi-K™ = Potassium nitrate (13-0-46),

Haifa MKP™ = Mono Potassium Phosphate (0-52-34),

AN = Ammonium Nitrate (33.5-0-0),

Haifa Cal™ = Calcium Nitrate (15.5-0-0-26CaO)

Magnisal™ = Magnesium nitrate (11-0-0-16MgO)

Micronutrients should be maintained at the following levels (ppm) throughout the growth period:

 

 

Fe	Mn	Zn	Cu	B	Mo
(ppm = g / m3)
0.9	0.55	0.32	0.05	0.25	0.05

 

5.2 Haifa NutriNet™ web software for Nutrigation™ programs

Use the NutriNet™ web software, accessible through our website or directly

at www.haifa-nutrinet.com to assist you in working out the recommended fertilizer rates at different growth stages according to the expected yield under your growing conditions.

 

The following are examples of recommendations for cucumbers grown in different soils and growing methods, as determined by NutriNet™:

A – Open-field grown cucumbers on loam (medium) texture soil

The expected yield is 40 t/ha. Irrigated by drip and the fertilizer application method is:base-dressing followed by side-dressing.

 

At the first stage, NutriNet™ presents the removed plant nutrients by the crop and the recommended application rates based on the expected yield and the selected growing method (Table 5.8):

• Growth method: Open field
• Soil type: loam
• Expected yield: 40 t/ha

 

 

Table 5.8: Nutrient requirements and recommended plant nutrient rates of cucumbers grown in loam soil with expected yield of 40 t/ha

	Plant Nutrient Requirements(kg/ha)
	N	P2O5	K2O	CaO	MgO
Removal by yield	44	20	80	10	8
Uptake by the whole plant	144	62	257	194	46
Recommended rates	173	180	334	97	46
Adjusted rates to loam soil	158	180	360	97	46

The next step allows selecting the methods of irrigation and fertilization. In the following example, the irrigation is by drip system and the fertilization by applying base-dressing followed by side-dressing (Tables 5.9, 5.10 and 5.11).

 

 

Table 5.9: Recommended base-dressing + side-dressing plant nutrient rates on irrigated crop by drip

	N	P2O5	K2O	CaO	MgO
Adjusted rates to loam soil	158	180	360	97	46
Base dressing (kg/ha)	47	108	144	78	37
Side dressing (kg/ha)	133	86	259	23	11
Total (kg/ha)*	180	194	403	101	48

*The values in this field take into account the inefficiency factors involved in base- and side-dressings.

 

 

Table 5.10: Suggested base-dressing fertilizers* rates to supply the recommended plant nutrients at expected yield of 40 t/ha cucumbers. The N-P-K-Ca-Mg are applied at 30-60-40-80-80%, respectively.

 

Suggested base dressing fertilizers	Fertilizers (kg/ha)	Plant nutrients (kg/ha)
		N	P2O5	K2O	CaO	MgO
		47	108	144	78	37
Ammonium nitrate (34%)	142	47
Superphosphate (25%)	432		108
Potassium sulfate (50%)	288			144
Dolomite (26%)	300				78
Magnesium sulfate (16%)	231					37

*Other fertilizers of choice may be introduced to supply the recommended plant nutrients.

 

 

Table 5.11: Suggested side-dressing fertilizers* rates to supply the recommended plant nutrients at

Suggested side dressing fertilizers	Fertilizers (kg/ha)	Plant nutrients (kg/ha)
		N	P2O5	K2O	CaO	MgO
		133	86	259	23	11
Ammonium nitrate (34%)	141	133
Superphosphate (45%)	191		86
Multi-K (46%)	563			259
Calcium nitrate (26%)	88				23
Magnesium sulfate (16%)	69					11

*Other fertilizers of choice may be exchanged to supply the recommended plant nutrients.

 

B – Open-field grown cucumbers, for processing, on clay (heavy) texture soil

The expected yield is 80 t/ha. Irrigated by drip and the fertilizer application method is:

base-dressing followed by Nutrigation™ (fertigation).

• Growth method: Open field
• Soil type: clay
• Expected yield: 80 t/ha

 

 

Table 5.12: Nutrient requirements and recommended plant nutrient rates of cucumbers, grown on clay soil with expected yield of 80 t/ha

 

	Nutrient requirements(kg/ha)
	N	P2O5	K2O	CaO	MgO
Removed by yield	88	40	160	20	16
Uptake by the whole plant	239	104	427	299	74
Recommended rates	287	231	555	150	74
Adjusted rates to clay soil *	263	231	598	150	74

The next step allows selecting the type of irrigation and fertilization method. In the following example, the irrigation is by drip system followed by Nutrigation™ (fertigation) (Tables 5.13, 5.14, 5.15, 5.16 and 5.17).

 

 

Table 5.13: Recommended base-dressing and side-dressing plant nutrient rates on cucumbers crop irrigated by drip

	N	P2O5	K2O	CaO	MgO
NPK required (kg/ha)	263	231	598	150	74
Base dressing (kg/ha) *	79	139	239	120	59
Nutrigation(fertigation) (kg/ha) **	184	92	359	30	15
Total (kg/ha) ***	263	231	598	150	74

* The N-P-K-Ca-Mg are applied at 30-60-40-80-80%, respectively.

** The N-P-K-Ca-Mg are applied at 70-40-60-20-20%, respectively.

***The values in this field take into account the efficiency involved in base dressings + Nutrigation™.

 

 

Table 5.14: Suggested base-dressing fertilizers* rates to supply the recommended plant nutrients

Suggested base dressing fertilizers	Fertilizers (kg/ha)	Plant nutrients (kg/ha)
		N	P2O5	K2O	CaO	MgO
		79	139	239	120	59
Ammonium nitrate (34%)	239	79
Superphosphate (25%)	556		139
Potassium sulfate (50%)	478			239
Dolomite (26%)	462				120
Magnesium sulfate (16%)	369					59

*Other fertilizers of choice may be introduced to supply the recommended plant nutrients.

 

 

Table 5.15: Suggested Nutrigation™ fertilizers* rates supplying the recommended plant nutrients at expected yield of 80 t/ha

Suggested Nutrigation (fertigation) fertilizers	Fertilizers (kg/ha)	Plant nutrients (kg/ha)
		N	P2O5	K2O	CaO	MgO
		184	92	359	30	15
Ammonium nitrate (33%)	112	36.8
Haifa MAP (12-61-0)	151	18.1	92
Multi-K (13-0-46)	780	101.5		359
Haifa Cal (26%)	115	17.3			30
Magnesium sulfate (16% MgO)	94					15
TOTAL	1,252	184	92	359	30	15

*Other fertilizers of choice may be introduced to supply the recommended plant nutrients.

 

 

Table 5.16: Plant nutrients distribution at the various growing stages by fertigation

	Nutrigation (kg/phase/ha)
Growth stage	N	P2O5	K2O	CaO	MgO
Planting	1	0	1	0	0
1st growth	13	6	25	2	1
Main season	107	54	209	17	9
End season	100	50	196	16	8
TOTAL	221	110	431	35	18
Kg suggested *	184	92	359	30	15

*The values in this fields take into account the efficiency involved in Nutrigation™.

 

 

Growthstage	Fertilizer 1	kg	Fertilizer 2	kg	Fertilizer 3	kg	Fertilizer 4	kg	Fertilizer 5	kg
planting	A.N.	2	no fert.	0	multi-K	2	no fert.	0	no fert.	0
1st growth	A.N.	11	MAP	10	multi-K	54	C.N.	8	Mg(SO4)2	6
main season	A.N.	81	MAP	89	Multi-K	454	C.N.	65	Mg(SO4)2	56
end season	A.N.	75	MAP	82	Multi-K	426	C.N.	62	Mg(SO4)2	50

A.N. = Ammonium nitrate (34%)

Haifa MAP™ = MAP (12-61-0)

Multi-K™ = Potassium nitrate (13-0-46)

C.N. = Calcium nitrate (26% CaO)

Mg (SO4)2 = Magnesium sulfate (16% MgO)

 

C – Tunnel grown cucumbers on loam (medium) texture soil

The expected yield is 120 t/ha. Irrigated by drip and the fertilizer application method is by based dressing followed by Nutrigation™ (fertigation).

• Growth method: Tunnel
• Soil type: loam
• Expected yield: 120 t/ha

 

 

Table 5.18: Nutrient requirements and recommended plant nutrient rates of cucumbers grown in clay soil with expected yield of 120 t/ha

	Nutrient Requirements(kg/ha)
	N	P2O5	K2O	CaO	MgO
Removed by yield	132	60	240	30	24
Uptake by the whole plant	323	141	578	382	97
Recommended rates	388	275	751	191	97
Adjusted rates to loam soil	355	275	809	191	97

The next step allows selecting the type of irrigation and fertilization method. In the following example, the irrigation is by drip system also used for Nutrigation™ (fertigation) (Tables 5.19, 5.20, 5.21, 5.22 and 5.23).

 

 

Table 5.19: Recommended base-dressing and side-dressing plant nutrient rates on cucumber crop

	N	P2O5	K2O	CaO	MgO
NPK required (kg/ha)	355	275	809	191	97
Base dressing (kg/ha) *	107	165	324	153	78
Nutrigation(fertigation) (kg/ha) **	248	110	485	38	19
Total (kg/ha) ***	355	275	809	191	97

* The N-P-K-Ca-Mg are applied at 30-60-40-80-80%, respectively.

** The N-P-K-Ca-Mg are applied at 70-40-60-20-20%, respectively.

***The values in this field take into account the efficiency involved in base dressings + Nutrigation™.

 

 

Table 5.20: Suggested base-dressing fertilizer* rates to supply the recommended plant nutrients

Suggested base dressing fertilizers	Fertilizers kg/ha	Plant nutrients (kg/ha)
		N	P2O5	K2O	CaO	MgO
		107	165	324	153	78
Ammonium nitrate (34%)	324	107
Superphosphate (25%)	660		165
Potassium sulfate (50%)	648			324
Dolomite (26%)	588				153
Magnesium sulfate (16%)	488					78

*Other fertilizers of choice may be introduced to supply the recommended plant nutrients.

 

 

Table 5.21: Suggested Nutrigation™ fertilizer* rates supplying the recommended plant nutrients at expected yield of 120 t/ha

Suggested Nutrigation (fertigation) fertilizers	Fertilizers kg/ha	Plant nutrients (kg/ha)
		N	P2O5	K2O	CaO	MgO
		248	110	485	38	19
Ammonium nitrate (33%)	165	54.3
Haifa MAP™ (12-61-0)	180	21.6
Multi-K ™(13-0-46)	1,054	137.1		485
Haifa cal ™(26%)	146	21.9			38
Magnesium sulfate (16% MgO)	119					19
TOTAL	1,664	248	110	485	38	19

*Other fertilizers of choice may be introduced to supply the recommended plant nutrients.

 

 

Table 5.22: Fertigation rates of plant nutrients at the various growing stages

Growth stage	N	P2O5	K2O	CaO	MgO
Planting	1	0	2	0	0
1st growth	17	8	34	3	1
Main season	144	64	282	22	11
End season	135	60	265	21	10
TOTAL	297	132	583	46	22
Kg suggested	248	110	485	38	19

 

 

Table 5.23: Suggested fertigation fertilizers rates at various growing stages of tunnel grown cucumbers

Growthstage	Fertilizer 1	kg	Fertilizer 2	kg	Fertilizer 3	kg	Fertilizer 4	kg	Fertilizer 5	kg
planting	A.N.	1	no fert.	0	Multi-K™	4	no fert.	0	no fert.	0
1st growth	A.N.	12	Haifa MAP™	13	Multi-K™	74	C.N.	12	Mg(SO4)2	6
main season	A.N.	115	Haifa MAP™	105	Multi-K™	613	C.N.	85	Mg(SO4)2	69
end season	A.N.	106	Haifa MAP™	98	Multi-K™	576	C.N.	81	Mg(SO4)2	63

A.N. = Ammonium nitrate (34%)

Haifa MAP™ = MAP (12-61-0)

Multi-K™ = Potassium nitrate (13-0-46)

C.N. = Calcium nitrate (26% CaO)

Mg (SO4)2 = Magnesium sulfate (16% MgO)

 

D – Greenhouse grown cucumbers on sandy (light) texture soil

The expected yield is 300 t/ha. Irrigated by drippers that serve also for fertilizer application by Nutrigation™ (fertigation).

• Growth method: Greenhouse
• Soil type: sandy
• Expected yield: 300 t/ha

 

 

Table 5.24: Nutrient requirements and recommended plant nutrient rates of cucumbers grown in sandy soil with expected yield of 300 t/ha

	Nutrient requirements(kg/ha)
	N	P2O5	K2O	CaO	MgO
Removal by yield	330	150	600	75	60
Uptake by the whole plant	667	293	1,197	698	190
Recommended rates	800	458	1,556	349	190
Adjusted rates to soil type (sand)	800	458	1,556	349	190

The next step allows selecting the irrigation and fertilization methods. In the following example, the irrigation is by drip system that is also used for Nutrigation™ (fertigation) (Tables 5.25, 5.26, 5.27 and 5.28).

 

 

Table 5.25: Recommended nutrients rates applied by Nutrigation™

	N	P2O5	K2O	CaO	MgO
NPK required (kg/ha)	800	458	1,556	349	190
Nutrigation– Fertigation (kg/ha)	800	458	1,556	349	190
Total (kg/ha)	800	458	1,556	349	190

 

 

Table 5.26: Suggested fertilizer* rates supplying the recommended plant nutrients at expected yield of 300 t/ha

Suggested Nutrigation (fertigation) fertilizers	Fertilizers (kg/ha)	Plant nutrients (kg/ha)
		N	P2O5	K2O	CaO	MgO
		800	458	1,556	349	190
Ammonium nitrate (33%)	0	0
Haifa MAP™ (12-61-0)	751	90	58
Multi-K™ (13-0-46)	3,383	439.7		1,556
Haifa Cal ™(26%)	1,342	201.3			349
Magnesium sulfate (16% MgO)	1,188					190

*Other fertilizers of choice may be introduced to supply the recommended plant nutrients.

 

 

Table 5.27: Plant nutrient fertigation rates at the various growth stages

Growth stage	N	P2O5	K2O	CaO	MgO
Planting	3	2	6	1	1
1st growth	60	32	108	24	13
Main season	502	266	905	203	111
End season	470	250	849	190	104
TOTAL	1,035	550	1,868	418	229
Kg suggested	800	458	1,556	349	190

 

 

Table 5.28: Suggested fertigation fertilizers rates at the various growth stages of greenhouse-grown cucumbers

Growthstage	Fertilizer 1	kg	Fertilizer 2	kg	Fertilizer 3	kg	Fertilizer 4	kg	Fertilizer 5	kg
planting	A.N.	1	no fert.	3		13	no fert.	4	no fert.	6
1st growth	A.N.	27	Haifa-MAP	52	Multi-K	235	C.N.	92	Mg(SO4)2	81
main season	A.N.	226	Haifa-MAP	436	Multi-K	1967	C.N.	781	Mg(SO4)2	694
end season	A.N.	0	Haifa-MAP	410	Multi-K	1846	C.N.	731	Mg(SO4)2	6650

A.N. = Ammonium nitrate (34%)

Haifa MAP™ = MAP (12-61-0)

Multi-K™ = Potassium nitrate (13-0-46)

C.N. = Calcium nitrate (26% CaO)

Mg(SO4)2 = Magnesium sulfate (16% MgO)

 

Fertilization and fertigation rates may vary according to cultivar, growing method, climatic conditions, growth stages and expected yield. By using Haifa NutriNet™ (https://www.haifa-nutrinet.com/) program on-line, you may obtain Haifa’s recommendations most suitable to your growing conditions by selecting the expected yield, growing method and growth stages.

 

 Need more information about growing cucumbers? You can always return to the cucumber fertilizer & cucumber crop guide table of contents  or the cucumber growth stages