Gas exchange of oat depending on nitrogen fertilization
Wiesława Piotrowska
wieslawa_piotrowska@sggw.edu.plKatedra Fizjologii Roślin, Szkoła Główna Gospodarstwa Wiejskiego, Warszawa (Poland)
Stefan Pietkiewicz
Katedra Fizjologii Roślin, Szkoła Główna Gospodarstwa Wiejskiego, Warszawa (Poland)
Zdzisław Wyszyński
Katedra Szczegółowej Uprawy Roślin, Szkoła Główna Gospodarstwa Wiejskiego, Warszawa (Poland)
Tadeusz Łoboda
Katedra Podstaw Produkcji Rolniczej, Politechnika Białostocka, Białystok (Poland)
Dariusz Gozdowski
Katedra Szczegółowej Uprawy Roślin, Szkoła Główna Gospodarstwa Wiejskiego, Warszawa (Poland)
Edyta Kotlarska-Jaros
Katedra Fizjologii Roślin, Szkoła Główna Gospodarstwa Wiejskiego, Warszawa (Poland)
Sławomir Stankowski
Katedra Biometrii i Doświadczalnictwa Rolniczego, Akademia Rolnicza w Szczecinie (Poland)
Abstract
In a greenhouse experiment, gas exchange parameters (photosynthesis, transpiration, their derivative water use efficiency and stomatal conductance) were studied for two new oat cultivars: hulled Chwat and naked Akt. The plants were grown in Wagner’s pots, fertilized with different nitrogen doses (0.5, 0.75 and 1 g N/pot), from three different fertilizers, and examined with the Li-6400 gas analyzer. No effect of the applied nitrogen fertilizers upon gas exchange differentiation was found. For the differentiated rates of nitrogen, a higher photosynthetic intensity was observed only during the phase of panicle appearance in plants grown in pots with the highest nitrogen rate, 1.0 g N/pot. Strong correlation was found between photosynthetic intensity and stomatal conductance (r = 0.87 average for cultivars and 0.88 for nitrogen rates), which shows a similar effect of the factors studied in the experiment. Water use efficiency (WUE) was much higher in the cv. Akt as compared to the cv. Chwat only in the early phases of ontogeny, independently of nitrogen rate. Value of WUE clearly decreased during the ontogeny for both cultivars. In later phases of ontogeny no differences were found in WUE neither for the cultivars nor for the nitrogen rates.
Keywords:
WUE, gas exchange, fertilization, nitrogen, oatReferences
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Authors
Wiesława Piotrowskawieslawa_piotrowska@sggw.edu.pl
Katedra Fizjologii Roślin, Szkoła Główna Gospodarstwa Wiejskiego, Warszawa Poland
Authors
Stefan PietkiewiczKatedra Fizjologii Roślin, Szkoła Główna Gospodarstwa Wiejskiego, Warszawa Poland
Authors
Zdzisław WyszyńskiKatedra Szczegółowej Uprawy Roślin, Szkoła Główna Gospodarstwa Wiejskiego, Warszawa Poland
Authors
Tadeusz ŁobodaKatedra Podstaw Produkcji Rolniczej, Politechnika Białostocka, Białystok Poland
Authors
Dariusz GozdowskiKatedra Szczegółowej Uprawy Roślin, Szkoła Główna Gospodarstwa Wiejskiego, Warszawa Poland
Authors
Edyta Kotlarska-JarosKatedra Fizjologii Roślin, Szkoła Główna Gospodarstwa Wiejskiego, Warszawa Poland
Authors
Sławomir StankowskiKatedra Biometrii i Doświadczalnictwa Rolniczego, Akademia Rolnicza w Szczecinie Poland
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Copyright (c) 2003 Wiesława Piotrowska, Stefan Pietkiewicz, Zdzisław Wyszyński, Tadeusz Łoboda, Dariusz Gozdowski, Edyta Kotlarska-Jaros, Sławomir Stankowski

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