La salinité de différents sols et substrats de plantes

Numéro d´article: P1521162

Principle

How suitable are certain soils and plant substrates for the nutrition of plants? This experiment is about measuring the conductivity, which in turn provides information as to which of the examined soils and plant substrates already contain nutrient salts for plant growth and to which of them nutrients should be added in the form of fertilisers.

Plants obtain their nutrients in the form of ions from the salts in the soil. The most important nutrients of a total of 16 nutrients that a plant needs for its growth are nitrogen in the form of nitrates and ammonium, phosphor in the form of phosphates and potassium in the form of potassium salts. In addition, the soils also require lime (calcium carbonate) in order to avoid acidification (decrease of the pH). For agricultural production, these nutrients are added to the soil via inorganic fertilisers, while potting compost with fertilisers is used for house plants.

Benefits

  • Experiment is part of an experiment set with numerous experiments in ecology
  • Universal handheld measurement device can also be used for other measurement parameters relevant in ecology, biology and chemistry
  • Outdoors measurement possible, for mobile use
  • Graphical display of measurement data
  • Data can be saved on SD memory card
  • All data can be transferred onto a computer for data analysis
  • Data analysis software can be freely distributed

Tasks

  1. Selecting appropriate samples
  2. Prepare samples for analysis
  3. Determination of the conductivity of the samples
  4. Comparison of the measurement values of the samples 

What you can learn about

  • Salt content 
  • Soil sample
  • Plant substrate
  • Fertilizer

 


Liste du matériel (extrait) Articles Montant
Cobra4 Mobile-Link 2 enregistreur mobile avec carte SD, accus, câble USB et logiciel 12620-10 1
Cobra4 capteur conductivité avec sonde en acier inox 12633-00 1
Balance portable, OHAUS JE120, 120 g / 0,1 g 48895-00 1
Support pour Cobra4 12681-00 1
Eau distillée 5 l 31246-81 1
Cylindre gradué 25ml forme haute 47328-00 1
Pissette 500 ml, plastique 33931-00 1
Boîte de pétri, d 100mm 64705-00 4
Bouteille Carrée hdpe 100ml 47417-00 4

Littérature pour cet article comme suit:

Title Produit Langue
Handbuch Schüler- und Lehrerversuche Cobra4, Physik, Chemie, Biologie, Alltagsphänomene, TESS und DEMO 01330-01 DEU
TESS and Demo advanced Manual Cobra4 Physics, Chemistry, Biology, Everyday Science 01330-02 ENG
Handbuch Schülerversuche Cobra4 Umwelt und Freiland, TESS advanced Biologie 12622-01 DEU
TESS advanced Applied Sciences manual Cobra4 Environment and Outdoors 12622-02 ENG
Schülerversuche Umwelt und Freiland mit Cobra4, Gerätesatz für 4 Arbeitsgruppen, TESS advanced Biologie 12626-88
Schülerversuche Umwelt und Freiland für Tablets, Gerätesatz für 4 Arbeitsgruppen, TESS advanced Biologie 15626-88

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Numéro d´article: P1521162

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