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Asparagus

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Cultivation of asparagus

The key for successful cultivation of the permanent crop asparacus will be an optimal plant recovery after cutting and harvesting. The foliar fertilization can help to keep plants healthy and optimize nutrition to achieve the best yield potential in the next season.   

The asparagus plants are accumulating the essential nutrients in their extensive root systems. To enhance the root growth, the soil should be in best condition without any soil compaction or stagnant water.


Availability of nutrients

Many parameters in the soil can limit the availability of nutrients – high pH-values can block micro-nutrients, low pH-values can block macro-nutrients. But also dry and cold weather conditions, soil texture and some nutrient antagonism (e.g. oversupply with potassium vs. magnesium and calcium) can lead to a deficiency of nutrients.

The steady supply and availability with the nutrient’s magnesium, manganese and boron is particularly important throughout the season. With a deficiency of these elements the asparagus reacts quickly with decrease of the assimilation performance (magnesium, manganese) or with the deterioration of the bar quality (boron).

Resistance and vitality

The application with phosphonates - Lebosol®-Kalium-Plus or Lebosol®-Magnesium-Plus - can help to keep plants healthy and strengthen the vitality. The plants are more robust and less susceptible for diseases. Several treatments with Lebosol®-Kalium-Plus or Lebosol®-Magnesium-Plus will enhance plants health and quality.

Foliar fertilization

Foliar fertilizers can be used preventive as integrated part of the fertilizer strategy or if it comes to an undersupply with nutrients and visible symptoms. Especially on sandy light soils or with high potassium content or under difficult weather situation (cold and wet) a magnesium deficiency can occur. This will be visible with the yellowing of phylloclades. The foliar application with Lebosol®-Magnesium 400 SC can help optimize nutrition with magnesium.

 The product Lebosol®-MagSOFT SC is containing additional sulphur and can be used for the application of magnesium and sulphur in one formulation.

A boron deficiency in asparagus can cause significant yield decrease up to 20% in certain years. The application with Lebosol®-Bor with 2 to 3 applications and a dose rate of 2 - 3 l/ha will ensure a sufficient boron supply.

An alternative product could be Lebosol®-Robustus SC 
(100 g/l B+215 g/l Ca), containing besides boron additional calcium.

Magnesium-deficiency on Phyllokladien

Magnesium-deficiency

Replantations and hair game

Aminosol® can be applied to prevent browsing damage by game. Aminosol® is produced from animal protein from food production. This protein is splited by enzymes into amino acids. This creates the typical Aminosol® smell. Hair game is perceiving this smell intensively and avoiding fields which are treated with the product.

Main recommendations

Aim/Problem Recommendation Time
Improvement in effectiveness and tolerability of soil-applied herbicides 0,2 - 0,6 l/ha Herbosol® (Increase to 0.6 l/ha on light soils with a low humus content; reduce to 0.2 l/ha for heavy soils with a high humus content.) With soil-applied herbicides
Improvement in effectiveness and tolerability of plant protection products 150 - 300 ml Aminosol® (per 100 l spray water) With plant protection products
Initial development, increase in resilience Phytoamin® (Immerse the plants in a solution of 1 % or pour with 5 - 10 l/ha Phytoamin®) Before new planting
To cover periods with poor growth conditions 4 - 6 l/ha Lebosol®-Total Care In the event of stress at the site
Improvement in quality and shelf life 2 - 3 times 5 l/ha Lebosol®-Kalium 450 Once sufficient leaf mass has developed
Improvement in leaf quality, chlorophyll, vitality, photosynthesis rate 2 - 3 times 3 - 5 l/ha Lebosol®-MagSOFT SC Once sufficient leaf mass has developed
Vitalisation, improvement in the photosynthesis rate, resilience, internal quality 2 - 4 times 4 - 6 l/ha VITALoSol® GOLD SC Once sufficient leaf mass has developed
Quality (cracks, hollow stalks, internal browning), calcium transport 2 - 4 times 2 - 3 l/ha Lebosol®-Robustus SC Once sufficient leaf mass has developed
Improvement in leaf quality, photosynthesis rate, N efficiency 2 - 3 times 1 l/ha Lebosol®-Mangan GOLD SC Once sufficient leaf mass has developed
Calcium transport, internal quality, vitamin synthesis 2 - 3 times 0,5 l/ha Lebosol®-Zink 700 SC Once sufficient leaf mass has developed
Depositing of reserve substances and vitality 2 times 5 - 10 l/ha Lebosol®-Magphos From the middle of the vegetation period
Treated crops are avoided by mice 3 - 5 times 5 l/ha Lebosol®-Schwefel 800 OD When required
Treated crops are avoided by furred game 2 l Aminosol® (With 2 l water 2 - 3 days beforehand (quantity for 1 ha)) When required