Diurnal Variations of Soil Electrical Resistivity and Photosynhtetic Activity of Short Rotation Coppice

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F19%3A43916725" target="_blank" >RIV/62156489:43410/19:43916725 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.cbks.cz/rostliny2019/prispevky/Majewski.pdf" target="_blank" >http://www.cbks.cz/rostliny2019/prispevky/Majewski.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Diurnal Variations of Soil Electrical Resistivity and Photosynhtetic Activity of Short Rotation Coppice

Popis výsledku v původním jazyce

Poplar and willow short rotation coppice (SRC) became popular in last decades as new agricultural system for production of renewable resources - biomass, also as land and soil management which benefits the environment (erosion control, biodiversity). Plantations also have relatively low-intensive agrotechnology and are therefore easy to maintain for farmers, as compared to conventional annual food crops. To evaluate the ecophysiological activity of the tree species, we performed a 1-day ad-hoc field experiment in a poplar plantation. We measured a net photosynthetic rate (Pn) and soil electrical resistivity (ρs) of several poplar trees Populus nigra L. in one of selected arrays of young plantation. Our goal was to observe differences in soil water availability and daily courses of Pn and transpiration (T) as well as the factors limiting both photosynthesis and stomatal closure in particular. Daily courses of Pn and T showed typical midday depression which was attributed to a drop in a stomatal conductance (Gs). These changes were induced by a daily courses of photosynthetically active radiation (PAR) and leaf temperature. Certain differences in Pn and T courses were observed between individual trees, however, a general trend was that Pn and T were closely coupled and well related to each other. The highest Pn and T values were found in the individuals, which were located at a margin of the plantation area and thus benefiting from a higher soil water availability measured by the electrical resistivity tomography approach. Our results show, that the lowest transpiration and the highest soil resistivity was found in the four year old trees. This is probably caused by different agronomy - while in four year old plantation there is no mechanical weeding, in younger (three years) plantation there a repeated mechanical weeding disrupts soil surface and allows better precipitation of rain water to subsurface layers old soil.

Název v anglickém jazyce

Diurnal Variations of Soil Electrical Resistivity and Photosynhtetic Activity of Short Rotation Coppice

Popis výsledku anglicky

Poplar and willow short rotation coppice (SRC) became popular in last decades as new agricultural system for production of renewable resources - biomass, also as land and soil management which benefits the environment (erosion control, biodiversity). Plantations also have relatively low-intensive agrotechnology and are therefore easy to maintain for farmers, as compared to conventional annual food crops. To evaluate the ecophysiological activity of the tree species, we performed a 1-day ad-hoc field experiment in a poplar plantation. We measured a net photosynthetic rate (Pn) and soil electrical resistivity (ρs) of several poplar trees Populus nigra L. in one of selected arrays of young plantation. Our goal was to observe differences in soil water availability and daily courses of Pn and transpiration (T) as well as the factors limiting both photosynthesis and stomatal closure in particular. Daily courses of Pn and T showed typical midday depression which was attributed to a drop in a stomatal conductance (Gs). These changes were induced by a daily courses of photosynthetically active radiation (PAR) and leaf temperature. Certain differences in Pn and T courses were observed between individual trees, however, a general trend was that Pn and T were closely coupled and well related to each other. The highest Pn and T values were found in the individuals, which were located at a margin of the plantation area and thus benefiting from a higher soil water availability measured by the electrical resistivity tomography approach. Our results show, that the lowest transpiration and the highest soil resistivity was found in the four year old trees. This is probably caused by different agronomy - while in four year old plantation there is no mechanical weeding, in younger (three years) plantation there a repeated mechanical weeding disrupts soil surface and allows better precipitation of rain water to subsurface layers old soil.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

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

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název statě ve sborníku

Zahradnictví: Vědecká příloha 2019

ISBN

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ISSN

1213-7596

e-ISSN

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Počet stran výsledku

12

Strana od-do

236-247

Název nakladatele

Profi Press s.r.o.

Místo vydání

Praha

Místo konání akce

Lednice

Datum konání akce

23. 10. 2019

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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