eprintid: 4451
rev_number: 14
eprint_status: archive
userid: 64
dir: disk0/00/00/44/51
datestamp: 2011-12-04 11:43:33
lastmod: 2011-12-04 11:43:33
status_changed: 2011-12-04 11:43:33
type: article
metadata_visibility: show
contact_email: Library-ICRISAT@cgiar.org
item_issues_count: 0
creators_name: Yoneyama, T
creators_name: Nambiar, P T C
creators_name: Lee, K K
creators_name: Srinivasa Rao, B
creators_name: Williams, J H
icrisatcreators_name: Yoneyama, T
icrisatcreators_name: Nambiar, P T C
icrisatcreators_name: Lee, K K
icrisatcreators_name: Srinivasa Rao, B
icrisatcreators_name: Williams, J H
affiliation: ICRISAT(Patancheru)
country: India
title: Nitrogen accumulation in three legumes and two cereals
with emphasis on estimation of N2 fixation in the legumes
by the natural15 N-abundance technique
ispublished: pub
subjects: s1.3
subjects: s1.4
subjects: s2.10
full_text_status: restricted
abstract: N accumulation and natural "N ahundance
in three legumes (groundnuts, cowpeas, and
soybeans) and in two cereals (sorghum and maize)
were investigated over two seasons in Alfisols with and
without N fertilization. Using the N uptake and natural
"N abundance of non-nodulating plants as the indication
of N derived from soil and fertilizer, the per
cent N derived from atmospheric N2 was calculated
for nodulated plants. In the first experiment, the
groundnut genotype contained 85% atmospherc-derived
N, but the percentage decreased with N application,
Estimates of atmosphere-derived N by the N-difference
and 15~-abundanctee chniques gave identical
results. The percentages of atmosphere-derived N estimated
by the two methods at different stages of
groundnut growth were also similar. In the second experiment,
atmosphere-derived N was estimated in
plants grown with 0-200 kg ha-' applied N. The estimated
atmosphere-derived N ranged from 42% to
61 % for groundnuts from 33% to 77% for cowpeas,
and from 24% to 48% for soybeans, depending on the
amount of N applied. Inoculation with a Bradyrhizobium
strain increased the percentage of atmospherederived
N in soybean plants grown without any fertilizer
N. The natural "N abundance of sorghum and
maize was very close to that of the non-nodulating
groundnut, suggesting that these cereals can be used as
reference plants in the estimation of atmosphere-derived
N by the natural "N-abundance method.
date: 1990
date_type: published
publication: Biology and Fertility of Soils
volume: 9
number: 1
publisher: Springer Verlag
pagerange: 25-30
refereed: TRUE
issn: 0178-2762
official_url: http://dx.doi.org/10.1007/BF00335857
related_url_url: http://scholar.google.com/scholar?hl=en&q=Nitrogen+accumulation+in+three+legumes+and+two+cereals+with+emphasis+on+estimation+of+N2+fixation+in+the+legumes+by+the+natural15+N-abundance+technique&btnG=Search&as_sdt=0%2C5&as_ylo=&as_vis=0
related_url_type: author
citation:   Yoneyama, T and Nambiar, P T C and Lee, K K and Srinivasa Rao, B and Williams, J H  (1990) Nitrogen accumulation in three legumes and two cereals with emphasis on estimation of N2 fixation in the legumes by the natural15 N-abundance technique.  Biology and Fertility of Soils, 9 (1).  pp. 25-30.  ISSN 0178-2762     
document_url: http://oar.icrisat.org/4451/1/876.pdf