Suggested Criteria for Determination of Microelements by Mehlich 3 Method in the Czech Republic - Results of Vegetation Experiments

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00027006%3A_____%2F18%3A00005022" target="_blank" >RIV/00027006:_____/18:00005022 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Suggested Criteria for Determination of Microelements by Mehlich 3 Method in the Czech Republic - Results of Vegetation Experiments

Popis výsledku v původním jazyce

The regular soil testing system in the Czech Republic is focused on essential nutrients (P, K, Mg, Ca) in Mehlich 3 extractant. The criteria for these essential nutrients valuation were confirmed and adjusted using results from long-term field experiments and pot experiments covering representative soil and climatic conditions of the Czech Republic. In the past there were studied relationships between the Mehlich 3 extractant and some other extractants for determination of micronutrients (DTPA extraction for determination of copper, zinc, iron and manganese; hot-water extraction for boron determination). Based on analytical results after using of Mehlich 3 method for determination of plant available B, Cu, Zn, Mn and Fe (and the following statistical evaluation) theoretical criteria were suggested for valuation of content these microelements in soil. It was necessary to verify and to adjust the criteria according to the analytical results using field and pot experiments and determination of micronutrients (B, Cu, Zn, Mn, Fe) in soil by method Mehlich 3. 252 results from different (representative) soil types (haplic chernozem; haplic luvisols; dystric cambisols - International soil classification system for naming soils and creating legends for soil maps; WRB – World Reference Base for Soil Resources 2014; World Soil Resources Reports No. 106, FAO, Rome) and 84 results from long-term experiments were used for the evaluation. Based on the results obtained from the vegetation experiments the following levels (confirming earlier suggested theoretical criteria – limits) for evaluation of micronutrients in the soil were postulated: i) low content, ii) middle content, iii) high content. According to evaluation levels of micronutrients in soil, the following fertilization rates can be used: 150% (for low content) , 100% (for middle content) and 50% (for high content) of expected uptake of micronutrients by grown crops.

Název v anglickém jazyce

Suggested Criteria for Determination of Microelements by Mehlich 3 Method in the Czech Republic - Results of Vegetation Experiments

Popis výsledku anglicky

The regular soil testing system in the Czech Republic is focused on essential nutrients (P, K, Mg, Ca) in Mehlich 3 extractant. The criteria for these essential nutrients valuation were confirmed and adjusted using results from long-term field experiments and pot experiments covering representative soil and climatic conditions of the Czech Republic. In the past there were studied relationships between the Mehlich 3 extractant and some other extractants for determination of micronutrients (DTPA extraction for determination of copper, zinc, iron and manganese; hot-water extraction for boron determination). Based on analytical results after using of Mehlich 3 method for determination of plant available B, Cu, Zn, Mn and Fe (and the following statistical evaluation) theoretical criteria were suggested for valuation of content these microelements in soil. It was necessary to verify and to adjust the criteria according to the analytical results using field and pot experiments and determination of micronutrients (B, Cu, Zn, Mn, Fe) in soil by method Mehlich 3. 252 results from different (representative) soil types (haplic chernozem; haplic luvisols; dystric cambisols - International soil classification system for naming soils and creating legends for soil maps; WRB – World Reference Base for Soil Resources 2014; World Soil Resources Reports No. 106, FAO, Rome) and 84 results from long-term experiments were used for the evaluation. Based on the results obtained from the vegetation experiments the following levels (confirming earlier suggested theoretical criteria – limits) for evaluation of micronutrients in the soil were postulated: i) low content, ii) middle content, iii) high content. According to evaluation levels of micronutrients in soil, the following fertilization rates can be used: 150% (for low content) , 100% (for middle content) and 50% (for high content) of expected uptake of micronutrients by grown crops.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

40106 - Agronomy, plant breeding and plant protection; (Agricultural biotechnology to be 4.4)

Projekt

<a href="/cs/project/QJ1530171" target="_blank" >QJ1530171: Rozšíření využitelnosti a aktualizace kategorií pro stanovení obsahu přístupných makro a mikroživin v půdě v rámci zajištění trvale udržitelné úrodnosti a produkční schopnosti zemědělských půd</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů