eprintid: 1586
rev_number: 11
eprint_status: archive
userid: 14
dir: disk0/00/00/15/86
datestamp: 2011-09-19 03:38:57
lastmod: 2013-09-14 10:20:46
status_changed: 2011-09-19 03:38:57
type: article
metadata_visibility: show
contact_email: Library-ICRISAT@cgiar.org
item_issues_count: 0
creators_name: Nakamura, T
creators_name: Adu-Gyamfi, J J
creators_name: Yamamoto, A
creators_name: Ishikawa, S
creators_name: Nakano, H
creators_name: Ito, O
icrisatcreators_name: Adu-Gyamfi, J J
icrisatcreators_name: Ishikawa, S
affiliation: JIRCAS
affiliation: ICRISAT(Kano)
affiliation: Experimental Farm of Tohoku University
affiliation: Hokkaido National Agricultural Experimental Station
country: Japan
country: Nigeria
title: Varietal differences in root growth as related to nitrogen uptake by sorghum plants in low-nitrogen environment
ispublished: pub
subjects: s1.4
full_text_status: restricted
abstract: Hybrid (Sorghum bicolor (L.) Moench cv. CSH 9) and local variety (S. bicolor cv. FSRP) of sorghum were grown in an Alfisol field and in pots of Alfisol in semi-arid tropical India, and the productivity of sorghum in low N condition was studied in relation to N absorption by plant. The grain yield of the hybrid (CSH 9) was higher than that of the local variety (FSRP) irrespective of the rate of N application. The reduction in hybrid grain yield was less than that for the local variety when N was not applied. After booting stage hybrid absorbed more N than the local variety. To estimate the role of roots in N absorption, the characteristics of N absorption were parameterized. Relative growth rate was highly correlated with relative N absorption rate in plant. N absorption was regulated by root activity (specific N absorption rate per unit root mass and length). Specific N absorption rate in roots at physiological maturity was higher in the hybrid than in local variety in low N conditions. Therefore, the smaller reduction of hybrid yield in low-N conditions was ascribed to high-N absorption rate in its roots, and the high ability of roots to absorb N after booting stage.
date: 2002
publication: Plant and Soil
volume: 245
number: 1
publisher: Kluwer
pagerange: 17-24
refereed: TRUE
official_url: http://dx.doi.org/10.1023/A:1020690501576
related_url_url: http://scholar.google.co.in/scholar?as_q=Varietal+differences+in+root+growth+as+related+to+nitrogen+uptake+by+sorghum+plants+in+low-nitrogen+environment&num=10&btnG=Search+Scholar&as_epq=&as_oq=&as_eq=&as_occt=title&as_sauthors=&as_publication=&as_ylo=&as
related_url_type: author
citation:   Nakamura, T and Adu-Gyamfi, J J and Yamamoto, A and Ishikawa, S and Nakano, H and Ito, O  (2002) Varietal differences in root growth as related to nitrogen uptake by sorghum plants in low-nitrogen environment.  Plant and Soil, 245 (1).  pp. 17-24.      
document_url: http://oar.icrisat.org/1586/1/PlantSoil245_1_17-24_2002.pdf