Fertilizer guide

          

 

 

Rapeseed (Brassica napus), also known as rapeoilseed rape belongs to the family Brassicaceae. The plant has a deep and long root, the stem is 1.5 m high approximately and the flowers are small, yellow and are grouped in terminal clusters. It is consumed in China and Southern Africa as a vegetable but is cultivated mainly for its oil-rich seed, the third-largest source of vegetable oil in the world. Rapeseed is grown for the production of animal feeds, edible vegetable oils, and there are also non-food uses, such as the industrial oils market, dominated by biodiesel, but also including lubricant and surfactant production. Biodiesel: this oil is the preferred oil stock for biodiesel production in most of Europe, accounting for about 80% of the feedstock. It can be sown in Spring and Autumn.

ClimateIt does not tolerate temperatures below -2 or -3 ºC from germination to rosette stage. In this stage, it can manage up to -15 ºC  (even this cold promotes the root development). Low temperatures and short days delay its maturation.

Soil: It performs well under a wide range of soil conditions but is not very drought tolerant. The clay-loam soils are the best soils for growing rapeseed. Also, it requires deep and well-drained soils.

pH: 5.5-7

 

Nutritional requirements

 

 

Oilseed rape nutritional requirements. Source: Merrien et al., 1988
N P2O5 K2O CaO MgO SO3
kg/ha. Yield: 3.5 t/ha
Central Europe 200-300 90-130 350-450 220 50 80
kg/ha. Yield: 3 t/ha
USA 192 48 80 79

 

 

 

 

Fertigation recommendations

It is one of the most demanding crop in terms of the soil nutrient supply requirements. In the temperate climate conditions, winter varieties are the most popular for the production of Oilseed rapeseed. For winter varieties sufficient quantities of nutrients must be available in autumn because the crop must produce about 2-4 t/ha of dry matter by winter in order to achieve high seed yields. The table below shows general recommendations as the kg of fertilizers required will depend on climate, varieties, soil, residues, etc. The nitrogen supply of oilseed rape is of central importance to ensure high yields. In addition, oilseed rape is a plant with an especially high sulphur requirement and is particularly sensitive to S deficiency.

Oilseed rape fertilizer recommendations (kg/ha)
N P2O5 K2O MgO SO3
180-220 40-75 40-200 30-50 80

 

Foliar fertilizers

Foliar fertilization is the fastest and most effective method to supplement and enrich plant nutrition and to correct nutritional deficiencies when needed. This contributes significantly to higher and better quality productions.

Sulphur, Boron, Manganese and Magnesium are also applied via foliar. Lima Europe has a wide range of foliar fertilizers and special products for foliar application.

To verify the safe rate under local conditions, it is advisable to spray recommended rate on a few plants. After 3-4 days check the tested plants for scorching symptoms.

 

Oilseed rape fertilizer program

 

 

NPK 28-10-10+ 2 MgO

NPK 17-17-17+ 3 MgO

N-pluS: 43% N + 13% SO3

Grogreen Ca/B: 2-4 kg/ha. In order to correct Ca and B deficiency. 

Pro-mino: 200-300 ml/hl from establishment to fruit set

Micro: 2 kg/ha. Possible deficiencies from vegetative growth to flowering

proteKt-K50: 2 l/ha at development of seeds stage

Mn E-13: 0.5-1 kg/ha at Spring (March/April)