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Titolo:
FOLIAR ABSORPTION OF (NH)-N-15 BY WHEAT AND RICE VARIETIES
Autore:
ASHRAF M; SHAMSI SRA; FAROOQEAZAM;
Indirizzi:
NUCL INST AGR & BIOL,DIV SOIL BIOL FAISALABAD PAKISTAN
Titolo Testata:
Pakistan journal of botany
fascicolo: 2, volume: 28, anno: 1996,
pagine: 195 - 202
SICI:
0556-3321(1996)28:2<195:FAO(BW>2.0.ZU;2-R
Fonte:
ISI
Lingua:
ENG
Soggetto:
ATMOSPHERIC AMMONIA; GASEOUS AMMONIA; NITROGEN; LEAVES; PHOTOSYNTHESIS; VOLATILIZATION; SEEDLINGS; RYEGRASS; CORN; NH3;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
21
Recensione:
Indirizzi per estratti:
Citazione:
M. Ashraf et al., "FOLIAR ABSORPTION OF (NH)-N-15 BY WHEAT AND RICE VARIETIES", Pakistan journal of botany, 28(2), 1996, pp. 195-202

Abstract

Plant tops are considered as both sink and source of various N gases and other air pollutants which therefore, may influence the gaseous N content of the environment. Five varieties each of wheat (Triticum aestivum L. and T. durum L.) viz., Pak-81, LU-26, Sarsabz, Durum and M-143 and rice (Oryza sativa L.) viz., Bas-370, Bas-385, DM-25, Kashmir Basmati and IR-6, were compared for NH3 absorption and its correlation with leaf area and N content of the plants. Eight week old plants grownin plastic pots were exposed to (NH3)-N-15 for 24 h in an air-tight canopy able to provide a limited supply of CO2. Labelled NH3 was generated by reacting N-15-labelled ammonium sulphate with NaOH in the canopy. Total N and N-15 content of the dried and powdered plant material was then determined. Upto 44% in rice and 50% in wheat of the (NH3)-N-15 generated in the canopy was assimilated by the plants. Varietal differences in foliar absorption of NH3 were observed. No correlation was obtained between leaf area and the amount of (NH3)-N-15 absorbed by different varieties indicating that NH3 absorption was not solely dependent on leaf area and/or photosynthetic activity of the plants.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 10/04/20 alle ore 02:00:26