Durian fertilizer & fertilization recommendation

Durian trees: Fertigation & foliar feeding recommendation

Combining fertigation with complementary foliar feeding treatments provides the Durian trees with all the essential nutrients for healthy growth

Soil Type: Medium – Heavy.
Plant Density: 88 – 115 tree/Ha.
Expected Yield: 150 – 250 Kg/Tree.

Mean nutrient requirement for fruit bearing trees (over 6 years old)

N	P₂O₅	K₂O
----------- kg/tree -----------
1.0 - 1.8	0.6 - 1.4	2.1 - 4.0

Recommendations for fertigation

Grwoth stage	Fertilizer recommendations		Nutrients supplied (g/tree)
Grwoth stage	Fertilizer	Rate (kg/tree)	N	P₂O₅	K₂O
1-2 months before flowering	Poly-Feed 9-27-27	0.5 – 1.0	45 – 90	135 - 270	135 – 270
Flowering	Poly-Feed 14-7-28	0.5 – 1.0	70 – 140	35 – 70	140 – 280
Fruit set	Poly-Feed 9-27-27	0.2 – 0.4	18 – 36	54 – 108	54 – 168
6 weeks after flowering	Poly-Feed 14-7-28	1.5 – 3.0	210 – 420	105 – 210	420 – 840
1 month before harvest	Multi-K	2.0 – 2.5	260 - 390	0	920 – 1,400
Post Harvest	Poly-Feed 9-27-27	0.5 – 1.0	45 – 90	135 - 270	135 – 270
Flushing	Poly-Feed 14-7-28	1.5 – 3.0	210 – 420	105 – 210	420 – 840
Total			860 – 1,600	570 – 1,140	2,220 – 4,000

PF = Polyfeed drip of the different analyses indicated.
Multi-K = 13-0-46 (Potassium nitrate, soluble)
Note: Rate of application should be adjusted according to soil and leaf analysis.

Additional to the fertilization by fertigation, foliar feeding is recommended as complementary treatments, as follows:

Growth stage	Fertilizer recommendations		Proven Effects
Growth stage	Fertilizers	Rate	Proven Effects
2 months after harvest	Magnisal	.4 - 0.5% by 2-3 sprays in 2 weeks intervals	Induction of new leaves, Improved health
2 months before flowering	MKP or MAP	0.5% by 3-5 sprays in 2 weeks intervals	Flower initiation
1 month after fruit set	Multi-K + Magnisal	1-2%, by 6-8 sprays in 2 weeks intervals	Increases fruit size & shape
1 month after fruit set	Multi-K + Magnisal	0.25-0.5% by 2-4 sprays in 2 weeks intervals	Increases total solids in fruit

Magnisal = Magnesium nitrate, 11-0-0 +15.8 MgO, a fully soluble fertilizer.
MKP = mono-potassium phosphate, 0-52-34, a fully soluble fertilizer.
MAP = mono-ammonium phosphate, 12-61-0, a fully soluble fertilizer.