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Dinitrogen fixation estimates in Vetch-barley swards using {sup 15} N-methodology

Abstract

N 2- fixation in vetch (Vicia Sativa) grown alone and in mixture with barley (hordeum vulgare) in pots was evaluated using {sup 15} N isotope dilution method. Two harvests were made over the growing season. The proportion of the above-ground N, derived from atmospheric N 2 (% Ndfa) in mixed vetch was significantly higher than that of vetch in pure culture for the different harvests. However, this increase was not accompanied with the amount of N 2-fixation. On the other hand, no significant differences were observed in N-content or in N-derived from soil between barley grown in mixture and in monoculture, in spite of the difference in the number of plants between the tow cropping systems. These results indicate a high competing capacity of barley for soil nitrogen in mixed culture. Barley grown together with vetch had lower atom % 15 N excess than barley grown in mono-culture because it may have received some of their N from N-released by the legume in the second herbage but not in the first. Overall, results obtained from this experiment indicate the importance of mixed crops for forage production. Based on these results, further investigation must carried out in the field. 1 fig.
Authors:
Kurdali, F; Sharabi, N E [1] 
  1. Atomic Energy Commission, P.O.Box 6091, Damascus, (Syrian Arab Republic)
Publication Date:
Oct 01, 1995
Product Type:
Miscellaneous
Report Number:
INIS-EG-001; CONF-9411323-
Reference Number:
SCA: 553002; PA: AIX-28:030239; EDB-97:057871; SN: 97001765058
Resource Relation:
Conference: 2. Arab conference on the peaceful uses of atomic energy, Cairo (Egypt), 5-9 Nov 1994; Other Information: PBD: Oct 1995; Related Information: Is Part Of Proceedings of the second Arab conference on the peaceful uses of atomic energy. Part II: A and B; Barakat, M.F.; El-Mashri, S.M. [eds.]; PB: 1199 p.
Subject:
55 BIOLOGY AND MEDICINE, BASIC STUDIES; NITROGEN FIXATION; BARLEY; GROWTH; VICIA; CROPS; EXPERIMENTAL DATA; FORAGE; LEGUMINOSAE; NITROGEN 15; PLANT BREEDING; SOILS
OSTI ID:
455972
Research Organizations:
Atomic Energy Authority, Cairo (Egypt); Arab Atomic Energy Agency (AAEA), Tunis (Tunisia); Middle Eastern Regional Radioisotope Centre for the Arab Countries, Cairo (Egypt)
Country of Origin:
Egypt
Language:
Arabic
Other Identifying Numbers:
Other: ON: DE97620040; ISBN 9973-9927-3-3; TRN: EG9601688030239
Availability:
INIS; OSTI as DE97620040
Submitting Site:
INIS
Size:
pp. 723
Announcement Date:
Jan 21, 2004

Citation Formats

Kurdali, F, and Sharabi, N E. Dinitrogen fixation estimates in Vetch-barley swards using {sup 15} N-methodology. Egypt: N. p., 1995. Web.
Kurdali, F, & Sharabi, N E. Dinitrogen fixation estimates in Vetch-barley swards using {sup 15} N-methodology. Egypt.
Kurdali, F, and Sharabi, N E. 1995. "Dinitrogen fixation estimates in Vetch-barley swards using {sup 15} N-methodology." Egypt.
@misc{etde_455972,
title = {Dinitrogen fixation estimates in Vetch-barley swards using {sup 15} N-methodology}
author = {Kurdali, F, and Sharabi, N E}
abstractNote = {N 2- fixation in vetch (Vicia Sativa) grown alone and in mixture with barley (hordeum vulgare) in pots was evaluated using {sup 15} N isotope dilution method. Two harvests were made over the growing season. The proportion of the above-ground N, derived from atmospheric N 2 (% Ndfa) in mixed vetch was significantly higher than that of vetch in pure culture for the different harvests. However, this increase was not accompanied with the amount of N 2-fixation. On the other hand, no significant differences were observed in N-content or in N-derived from soil between barley grown in mixture and in monoculture, in spite of the difference in the number of plants between the tow cropping systems. These results indicate a high competing capacity of barley for soil nitrogen in mixed culture. Barley grown together with vetch had lower atom % 15 N excess than barley grown in mono-culture because it may have received some of their N from N-released by the legume in the second herbage but not in the first. Overall, results obtained from this experiment indicate the importance of mixed crops for forage production. Based on these results, further investigation must carried out in the field. 1 fig.}
place = {Egypt}
year = {1995}
month = {Oct}
}