GASEOUS CO2 EXCHANGE IN SILVER BIRCH SAPLINGS GROWING UNDER DIFFERENT LEVELS OF NITROGEN SUPPLY
A comparative assessment of gaseous CO 2 exchange in leaves of 5–6 years old saplings o f two forms of silver birch ( Betula pendula and Betula pendula var. сarelica ) and downy birch ( Betula pubescens Ehrh., 1789) growing under different levels of nitrogen nutrition was done. The study was carried...
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ftdoajarticles:oai:doaj.org/article:dc513e119e2d44f1bf1561222ab7b525 2023-05-15T17:01:33+02:00 GASEOUS CO2 EXCHANGE IN SILVER BIRCH SAPLINGS GROWING UNDER DIFFERENT LEVELS OF NITROGEN SUPPLY Viktor Bolondinskii Lyudmila Vilikainen 2018-12-01T00:00:00Z https://doi.org/10.17076/eb885 https://doaj.org/article/dc513e119e2d44f1bf1561222ab7b525 EN RU eng rus Karelian Research Centre of the Russian Academy of Sciences http://journals.krc.karelia.ru/index.php/biology/article/view/885 https://doaj.org/toc/1997-3217 https://doaj.org/toc/2312-4504 1997-3217 2312-4504 doi:10.17076/eb885 https://doaj.org/article/dc513e119e2d44f1bf1561222ab7b525 Transactions of the Karelian Research Centre of the Russian Academy of Sciences, Iss 12 (2018) betula pendula var. сarelica gaseous со2 exchange respiration light response curve for net photosynthesis chlorophyll nitrogen nutrition Science Q article 2018 ftdoajarticles https://doi.org/10.17076/eb885 2022-12-31T03:47:47Z A comparative assessment of gaseous CO 2 exchange in leaves of 5–6 years old saplings o f two forms of silver birch ( Betula pendula and Betula pendula var. сarelica ) and downy birch ( Betula pubescens Ehrh., 1789) growing under different levels of nitrogen nutrition was done. The study was carried out in five plots (control sector, three sectors fertilized with different doses of NH 4 NO 3 , and a sector with NPK fertilization) at the Agrobiological Research Station of the Karelian Research Centre RAS located at the southern outskirts of Petrozavodsk. Both in the control sector (where the content of nitrogen was 0.23 ± 0.04 %) and in most of the fertilized sectors, there was no significant difference between the mean values of photosynthesis in B. pendula and B. pendula var. сarelica either for the entire PhAR range or for PhAR > 1400 μmol m- 2 с -1 . Nitrogen fertilization had a beneficial effect on the growth and the magnitude of gaseous CO 2 exchange of the studied objects. The calculated parameters of light response curves for net photosynthesis have shown an improved performance of the photosynthetic apparatus upon fertilization. Where PhAR values were low, its efficiency in Karelian birch was much higher compared with silver birch ( B. pendula ), and increased with the elevation of the nitrogen dosage. In the conditions of soil moisture shortage, there was no significant difference between chlorophyll content in leaves of fertilized and non-fertilized plants. The carotenoid content in the leaves of non-fertilized plants was 1.3–1.5‑fold that of fertilized plants. Even a small dose of nitrogen fertilizer (20 g per tree) had a favorable effect on the water content of leaves in a dry period. In the second year of fertilization, the midday depression of photosynthesis increased considerably, especially in the sectors with high doses of nitrogen fertilizer. In the control sector, the decrease in photosynthesis in the absence of air drought and with sufficient soil moisture content was 20–25 %, and in ... Article in Journal/Newspaper karelian Directory of Open Access Journals: DOAJ Articles Proceedings of the Karelian Research Centre of the Russian Academy of Sciences 12 99 |
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betula pendula var. сarelica gaseous со2 exchange respiration light response curve for net photosynthesis chlorophyll nitrogen nutrition Science Q |
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betula pendula var. сarelica gaseous со2 exchange respiration light response curve for net photosynthesis chlorophyll nitrogen nutrition Science Q Viktor Bolondinskii Lyudmila Vilikainen GASEOUS CO2 EXCHANGE IN SILVER BIRCH SAPLINGS GROWING UNDER DIFFERENT LEVELS OF NITROGEN SUPPLY |
topic_facet |
betula pendula var. сarelica gaseous со2 exchange respiration light response curve for net photosynthesis chlorophyll nitrogen nutrition Science Q |
description |
A comparative assessment of gaseous CO 2 exchange in leaves of 5–6 years old saplings o f two forms of silver birch ( Betula pendula and Betula pendula var. сarelica ) and downy birch ( Betula pubescens Ehrh., 1789) growing under different levels of nitrogen nutrition was done. The study was carried out in five plots (control sector, three sectors fertilized with different doses of NH 4 NO 3 , and a sector with NPK fertilization) at the Agrobiological Research Station of the Karelian Research Centre RAS located at the southern outskirts of Petrozavodsk. Both in the control sector (where the content of nitrogen was 0.23 ± 0.04 %) and in most of the fertilized sectors, there was no significant difference between the mean values of photosynthesis in B. pendula and B. pendula var. сarelica either for the entire PhAR range or for PhAR > 1400 μmol m- 2 с -1 . Nitrogen fertilization had a beneficial effect on the growth and the magnitude of gaseous CO 2 exchange of the studied objects. The calculated parameters of light response curves for net photosynthesis have shown an improved performance of the photosynthetic apparatus upon fertilization. Where PhAR values were low, its efficiency in Karelian birch was much higher compared with silver birch ( B. pendula ), and increased with the elevation of the nitrogen dosage. In the conditions of soil moisture shortage, there was no significant difference between chlorophyll content in leaves of fertilized and non-fertilized plants. The carotenoid content in the leaves of non-fertilized plants was 1.3–1.5‑fold that of fertilized plants. Even a small dose of nitrogen fertilizer (20 g per tree) had a favorable effect on the water content of leaves in a dry period. In the second year of fertilization, the midday depression of photosynthesis increased considerably, especially in the sectors with high doses of nitrogen fertilizer. In the control sector, the decrease in photosynthesis in the absence of air drought and with sufficient soil moisture content was 20–25 %, and in ... |
format |
Article in Journal/Newspaper |
author |
Viktor Bolondinskii Lyudmila Vilikainen |
author_facet |
Viktor Bolondinskii Lyudmila Vilikainen |
author_sort |
Viktor Bolondinskii |
title |
GASEOUS CO2 EXCHANGE IN SILVER BIRCH SAPLINGS GROWING UNDER DIFFERENT LEVELS OF NITROGEN SUPPLY |
title_short |
GASEOUS CO2 EXCHANGE IN SILVER BIRCH SAPLINGS GROWING UNDER DIFFERENT LEVELS OF NITROGEN SUPPLY |
title_full |
GASEOUS CO2 EXCHANGE IN SILVER BIRCH SAPLINGS GROWING UNDER DIFFERENT LEVELS OF NITROGEN SUPPLY |
title_fullStr |
GASEOUS CO2 EXCHANGE IN SILVER BIRCH SAPLINGS GROWING UNDER DIFFERENT LEVELS OF NITROGEN SUPPLY |
title_full_unstemmed |
GASEOUS CO2 EXCHANGE IN SILVER BIRCH SAPLINGS GROWING UNDER DIFFERENT LEVELS OF NITROGEN SUPPLY |
title_sort |
gaseous co2 exchange in silver birch saplings growing under different levels of nitrogen supply |
publisher |
Karelian Research Centre of the Russian Academy of Sciences |
publishDate |
2018 |
url |
https://doi.org/10.17076/eb885 https://doaj.org/article/dc513e119e2d44f1bf1561222ab7b525 |
genre |
karelian |
genre_facet |
karelian |
op_source |
Transactions of the Karelian Research Centre of the Russian Academy of Sciences, Iss 12 (2018) |
op_relation |
http://journals.krc.karelia.ru/index.php/biology/article/view/885 https://doaj.org/toc/1997-3217 https://doaj.org/toc/2312-4504 1997-3217 2312-4504 doi:10.17076/eb885 https://doaj.org/article/dc513e119e2d44f1bf1561222ab7b525 |
op_doi |
https://doi.org/10.17076/eb885 |
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Proceedings of the Karelian Research Centre of the Russian Academy of Sciences |
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12 |
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99 |
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1766054655853330432 |