Fertilization of courgette in greenhouses

Haifa's fertilizers supply the courgette with all the needed nutrients, by base-dressing and fertigation fertilization methods

Growing method: Greenhouse.
Plant density: 10,000 plants / Ha.
Expected yield: 80-100 T/Ha.

Total uptake

N	P₂O₅	K₂O
200-225	100-125	300-350

A. Base-dressing

Nutrients required (Kg/Ha)				Recommended fertilizers (Kg/Ha)
N	P₂O₅	K₂O	MgO	A.S.	SSP	K₂SO₄	Mag. Sulphate
30	50	100	37	120	250	200	240

B. Fertigation

Growth stage	Nutrients required (Kg/Ha)				Recommended fertilizer (Kg/Ha)
Growth stage	N	P₂O₅	K₂O	CaO	A.N.	MAP	Multi-K	Cal. Nit.
Transplanting – 21 days	0	0	0	0	-	-	-	-
22 – 52 days	65	55	0	32	120	90	-	120
53 – 120 days	177	130	236	32	200	214	513	120

Nutrition database for courgette (squash)

	Concentration
	Rockwool				Plant – dry matter
Parameter	Nutrient Solution	Root Environ.	Nutrient Solution	Root Environ.	Guiding Range	Deficient	Excessive
EC (mS/cm)	2.2	3.0
	(mg/l)		(mg/l)		(%)
NH₄	22.5	9.0
N-NH₄	17.3	6.9
K in sap
K	283.5	312.8			3.72
Ca	145.4	260.7			1.40
Mg	48.6	85.1			0.49
N, total					4.90
NO₃	992.0	1116.0			1.86
N-NO₃	223.9	251.9
S, total					0.32
SO₄	120.1	336.4			0.29
P					0.93
H₂PO₄	121.3	87.3
Cl
Na
					mg/Kg (ppm)
Fe	0.559	0.838			111.7
Mn	0.549	0.385			82.4
Zn	0.327	0.458			91.5
B	0.324	0.648			37.8
Cu	0.048	0.064			12.7
Mo	0.048	-

Important note: The a/m database was prepared to fit Dutch conditions (low transpiration and low EC of the water). Some modifications may be required to correspond to your local conditions.

sources:

N. Straver. Nutrient solutions for vegetables and flowers grown in water or substrates. 10th Ed. 1994.
• C. de Kreij, Sonneveld C., Warmenhoven M.G. and Straver N.A. Guide values for nutrient element contents of vegetables and flowers under glass. 3rd Ed. 1992.