Interaction between Boron Availability and Phosphorus Application in a Field Experiment

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00027006%3A_____%2F18%3A00005024" target="_blank" >RIV/00027006:_____/18:00005024 - 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

Interaction between Boron Availability and Phosphorus Application in a Field Experiment

Popis výsledku v původním jazyce

Boron (B) represents one of the most important micronutrients essential for plant nutrition. Its uptake by plants is mainly in the form of boric acid from soil solution. The B availability to plants depends on boron adsorption to soil particles, such as clay minerals, aluminium and iron hydroxides, carbonates and organic matter. Boron interacts with phosphorus in soil and this may affect its availability to plants. The objective of the research was to study the potential interactions between phosphorus and boron available fractions under different P doses and the effect on plant uptake of B. The suitability of two soil tests (Mehlich 3 and NH4 acetate) for determination of boron availability was also evaluated. The field experiment was carried out in Cambisol soil type at Humpolec experimental station, located at the Bohemian-Moravian Higlands, Czech Republic. The fertilization rates were 20 – 40 – 80 kg P ha-1 added as triple superphosphate. The nitrogen was added in the unified dose for all treatments - 30 kg N ha-1 to spring barley in 2015 and 180 kg N ha-1 to oil seed rape in 2016. Two soil tests and were used for the determination of the total available (Mehlich 3) and exchangeable (NH4 acetate) boron and phosphorus content. Possible interactions between these two nutrients were studied. The B content in plant tissues (grain, seeds, straw) decreased with increasing P dose by a maximum of 30% for barley grain, 25% for barley straw, 11% for seeds for oil seed rape and 45% for oil seed straw in comparison with control. This led to the decrease of B-uptake by plants up to 20% despite the increase of yields of grain, seeds and straw of both crops caused by phosphorus supply. No significant changes in soil pH were determined in soils, however a slight tendency of pH increase under increasing P doses was observed (pH 6.24-6.48). The decrease of the available boron fractions by 5-6% for Mehlich 3 method and by 40% in case of NH4 acetate extractant was detected under increasing phosphorus fertilization rates. B fractions determined by Mehlich 3 method significantly decreased only at the dose 80 kg P ha-1, whereas the exchangeable B fractions significantly decreased even at the lowest dose 20 kg P ha-1. NH4 acetate test showed more sensibility to determine changes in B availability in soils. Mehlich 3 extractant generally extracts higher amount of elements due to its low pH (pH = 2.5) and the presence of nitric and acetic acid. Therefore more boron adsorbed i.e. on clay minerals or hydrooxides of Al or Fe or other soil particles could be extracted. The interactions between phosphorus and boron should be taken into consideration when deciding about phosphorus fertilization of soils as phosphorus and boron can compete for the adsorption sites in soil.

Název v anglickém jazyce

Interaction between Boron Availability and Phosphorus Application in a Field Experiment

Popis výsledku anglicky

Boron (B) represents one of the most important micronutrients essential for plant nutrition. Its uptake by plants is mainly in the form of boric acid from soil solution. The B availability to plants depends on boron adsorption to soil particles, such as clay minerals, aluminium and iron hydroxides, carbonates and organic matter. Boron interacts with phosphorus in soil and this may affect its availability to plants. The objective of the research was to study the potential interactions between phosphorus and boron available fractions under different P doses and the effect on plant uptake of B. The suitability of two soil tests (Mehlich 3 and NH4 acetate) for determination of boron availability was also evaluated. The field experiment was carried out in Cambisol soil type at Humpolec experimental station, located at the Bohemian-Moravian Higlands, Czech Republic. The fertilization rates were 20 – 40 – 80 kg P ha-1 added as triple superphosphate. The nitrogen was added in the unified dose for all treatments - 30 kg N ha-1 to spring barley in 2015 and 180 kg N ha-1 to oil seed rape in 2016. Two soil tests and were used for the determination of the total available (Mehlich 3) and exchangeable (NH4 acetate) boron and phosphorus content. Possible interactions between these two nutrients were studied. The B content in plant tissues (grain, seeds, straw) decreased with increasing P dose by a maximum of 30% for barley grain, 25% for barley straw, 11% for seeds for oil seed rape and 45% for oil seed straw in comparison with control. This led to the decrease of B-uptake by plants up to 20% despite the increase of yields of grain, seeds and straw of both crops caused by phosphorus supply. No significant changes in soil pH were determined in soils, however a slight tendency of pH increase under increasing P doses was observed (pH 6.24-6.48). The decrease of the available boron fractions by 5-6% for Mehlich 3 method and by 40% in case of NH4 acetate extractant was detected under increasing phosphorus fertilization rates. B fractions determined by Mehlich 3 method significantly decreased only at the dose 80 kg P ha-1, whereas the exchangeable B fractions significantly decreased even at the lowest dose 20 kg P ha-1. NH4 acetate test showed more sensibility to determine changes in B availability in soils. Mehlich 3 extractant generally extracts higher amount of elements due to its low pH (pH = 2.5) and the presence of nitric and acetic acid. Therefore more boron adsorbed i.e. on clay minerals or hydrooxides of Al or Fe or other soil particles could be extracted. The interactions between phosphorus and boron should be taken into consideration when deciding about phosphorus fertilization of soils as phosphorus and boron can compete for the adsorption sites in soil.

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)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

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