Principles of Fertigation Grow More With LessRoy Peleg, Netafim

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Introduction Essential Elements Plant Disorders Fertigation Concepts Fertigation Devices Dosing Systems SummaryBack Next Menu

Needs of Plants Supplying a Nitrogen, Phosphorus, Potassium and others minerals is essential for optimal plant growth. The nitrogen, phosphorus, potassium is main builder for proteins, amino acids, chlorophyll and enzymes.

Introduction

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Global Trends In Population Growth

Introduction

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Nutrient / Growth Ratio

Introduction

Luxury Range

Plant Growth, Yield

Adequate Range Toxicity Range

Deficiency Range

Content of Mineral Nutrients in Dry Plant Tissue

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Nutrient / Growth Ratio

Introduction

Plant Growth, Yield

Optimal Level Critical Deficiency Level Critical Toxicity Level

Content of Mineral Nutrients in Dry Plant Tissue

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Nutrient / Growth RatioVisible Deficiency Symptoms

Introduction

Visible Toxicity Symptoms

Plant Growth, Yield

Optimal Level Critical Deficiency Level Critical Toxicity Level

Content of Mineral Nutrients in Dry Plant Tissue

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Plants Fertigation Is Based on Essential 16 Elements

Essential Elements

Optimal plant fertigation will include 16 elements which are characterized as microelements consisting of Nitrogen Phosphorus Potassium as well as calcium magnesium and sulfur.

Microelements consist of the following elements: Fe, Mn, Zn, Cu,Mo,B,Cl and H,O and C which are supplied as water (H20) and carbon bi oxide(CO2).

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Nitrogen

Essential Elements

Nitrogen is the builder of proteins, amino acids, chlorophyll & enzymes. Responsible for vigorous plant growth.

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Nitrogen160 140WM per Pot

Essential Elements

Effect of Nitrogen on Yields of Sweet Basil (Ocimum basilicum L.)

120 100 80 60 1.8 3.5mmol/l

7

14

28

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Phosphorous

Essential Elements

Phosphorous (P) is vital to plant growth and is found in every living plant cell. Involved in several key functions: Energy transfer & Photosynthesis

Transformation of sugar and starches Nutrient movement within the plant Transfer of genetic characteristics

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PhosphorousIncreases transformation of sugar and starches and energy transfer process

Essential Elements

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Potassium

Essential Elements

Potassium compensates the osmotic pressure in the plant Potassium is located in the stomata's guard cell and neutralizes charges differences

Without K

With K

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K Increases Protein Content in Corn700

Essential Elements

Protein yield = grain yield * % protein

Protein yield (Kg/Ha)

600 500 400 300 200 100 0 0 110 175Jiajiang, Sichuan, China 1999

Potassium (K2O Kg/Ha)Back Next Menu

Resulted from Inefficient Fertigation

Plants Disorder

Keeping an accurate supply of nutrients to the plant, is crucial. Deficiency of nutrients could cause plants disorders. Disorders symptoms are usually seen on leafs or fruits. When symptoms are identified, damage is usually irreversible.

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Resulted from Inefficient Fertigation Nitrogen

Plants Disorder

Nitrogen deficiency in Bananas stem and leafs

Nitrogen deficiency in cucumber

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Resulted from Inefficient Fertigation Phosphorus

Plants Disorder

Red veins in tomato leafs as result of phosphorus deficiency

Phosphorus deficiency in Avocado

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Resulted from Inefficient Fertigation Potassium

Plants Disorder

Potassium deficiency in grape leafs Potassium deficiency Resulting with Cucumber leafs bleachingBack Next Menu

Calcium

Plants Disorder

Browning symptoms as result of calcium deficiency in lettuce

Calcium deficiency Resulting with blossom end rot in Sweet pepper

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Disorders in Plants

Plants Disorder

Plan your fertigation strategy according to the crop needs, environment conditions and soil conditions. Use monitoring tools in order to adjust your strategy according to continuously changes. Keep proportional fertigation or just keep fertigation Choose the proper fertigation systems Use fertilizers coming only from reliable producers.

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The Onion Shaped Wetting Zone

Fertigation Concepts

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Fertigation Concepts

Fertigation Concepts

Proportional Fertigation60

Quantitive fertigation70 Quantity of fertilizer 60 50 40 30 20 10 0 1 2 3 4 5

Quantity of Fertigation

50 40 30 20 10 0 1 2 3 Time minutes X 10 4 5

Time minutes X 10

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Uniform Wetting Points Along the Row

Fertigation Concepts

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Wetted Area By Dripper in Different Soils

Fertigation Concepts

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Advantages of Fertigation

Fertigation Concepts

Nutrient requirements according to crop stages (teaspoon feeding). More uniform distribution and closer to root system. Better availability of nutrients to plants. Nutrient uptake increases. Reduced application losses of nutrients by leaching. Less costly application labor. Application flexibility (time, weather, soil).

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Fertigation Devices Pressure devices Fertilization tank Venturi injector Hydraulic Systems Quantitative hydraulic pump Proportional hydraulic pump Dosing units systems Principles Inline-Jet Bypass-Jet

Fertigation Devices

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Fertigation Tank

Fertigation Devices

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Venturi Injector

Fertigation Devices

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Proportional Hydraulic Pump

Fertigation Devices

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Quantitative Hydraulic Pump

Fertigation Devices

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NMC 64/15 & Dosing SystemThe Netaget dosing unit ensures outstanding accuracy, homogeneous solution and simplicity User friendly controller consisting of: Large graphic display Flexible hardware structure Suitable for Irrigation and climate application

Dosing System

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Dosing UnitsMain Benefits State of the art technology ensures precise fertigation Unique hydro-mix technology Dosing channels based on Venturi injector with no moving parts Quick action valves EC/pH measurement and control

Dosing System

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Important Features

Dosing System

Quick Action Valves

Desired Set Point Offset Injector Coarse correction Fine correction

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NetaJet TypesSystem Inlet

Dosing System

Mixing chamberpH

System Outlet

Netafim Inline-Jet: Flow rates: 5 20 m3/hPump

EC

Mixing chamber

Netafim Bypass-Jet: Flow rates: 20 100 m 3/h

pH EC

Pump

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Summary

Summary

Fertigation is one of the major foundations for a plant growth Optimal plant fertigation will include 16 elements Keeping accurate nutrient content is very important for optimal growth and maximum yield Deficiency of nutrients could cause plants disorders Preventing fertigation disorders in Plants is based on good monitoring, keeping proportional fertigation and choosing the proper fertigation system.

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