Subscribe Now Subscribe Today
Science Alert
 
Blue
   
Curve Top
Pakistan Journal of Biological Sciences
  Year: 1998 | Volume: 1 | Issue: 4 | Page No.: 342-345
DOI: 10.3923/pjbs.1998.342.345
 
Facebook Twitter Digg Reddit Linkedin StumbleUpon E-mail

Differential Growth Behavior of Cotton Varieties at Adequate and Deficient Levels of Nitrogen and Phosphorus.

Zaheer Ahmad, Maqsood Ahmad Gill, Abdul Matin Shah, Tahir Mahmood, Hamud-ur-Rehman and M. Yaseen

Abstract:
Seven cotton (Gossypitn hirsuturn L.) varieties were evaluated for growth and utilization efficiency of nitrogen (N) and phosphorus (P), in hydroponics using modified Johnson's solutions containing adequate (6.0 mM N and 0.20 mM P), and deficient levels of N (0.8 mM) and P (0.01 mM). Substantial differences were observed among varieties for accumulation of shoot dry weight (SDW), relative reduction in shoot biomass due to N-deficiency (NSF), and uptake by shoot in case of N, and root dry weight (RDW), root:shoot ratio (RSR), relative reduction in shoot biomass due to P-deficiency (PSF), concentration in shoot and uptake by shoot in case of P. Variety SLS-1 exhibited the minimum stress at N-deficiency (NSF = 34%) as well as P-deficiency (PSF = 59%) among all the varieties. A negative correlation (r =0.555, n =35) between SDW and RSR in P-stressed plants suggested increase RDW production at the cost SDW. Utilization efficiency in varieties remained unchanged in case of N-deficiency stress and decreased in case of P-deficiency stress as compared to control, and in both the cases differences among varieties remained statistically non-significant. Nutrient level X variety interaction was significant for all the parameters studied in case of P, whereas for N, the interaction was significant only for shoot dry weight, stress factor and uptake by shoot.
PDF Fulltext XML References Citation Report Citation
 RELATED ARTICLES:
  •    Genetic Variation for Nitrogen Use in Cotton (Gossypium hirsutum L.)
  •    Genetic Variability among Different Rice Cultivars for Phosphorus Uptake and Utilization
How to cite this article:

Zaheer Ahmad, Maqsood Ahmad Gill, Abdul Matin Shah, Tahir Mahmood, Hamud-ur-Rehman and M. Yaseen, 1998. Differential Growth Behavior of Cotton Varieties at Adequate and Deficient Levels of Nitrogen and Phosphorus.. Pakistan Journal of Biological Sciences, 1: 342-345.

DOI: 10.3923/pjbs.1998.342.345

URL: https://scialert.net/abstract/?doi=pjbs.1998.342.345

COMMENT ON THIS PAPER
 
 
 

 

 
 
 
 
 
 
 
 
 

 
 
 
 
 
 
 
 
 
 
 
 

Curve Bottom