relation: http://oar.icrisat.org/1586/
title: Varietal differences in root growth as related to nitrogen uptake by sorghum plants in low-nitrogen environment
creator: Nakamura, T
creator: Adu-Gyamfi, J J
creator: Yamamoto, A
creator: Ishikawa, S
creator: Nakano, H
creator: Ito, O
subject: Sorghum
description: 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.
publisher: Kluwer
date: 2002
type: Article
type: PeerReviewed
format: application/pdf
language: en
identifier: http://oar.icrisat.org/1586/1/PlantSoil245_1_17-24_2002.pdf
identifier:   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.      
relation: http://dx.doi.org/10.1023/A:1020690501576