The interrelation between growth and development of wheat as influenced by temperature, light and nitrogen

M.S.H. Khalil

Research output: Thesisinternal PhD, WU

Abstract

Development was studied in wheat, mainly the subtropical varieties Hindi and Baladi. Leaf emergence was faster and the relation shoot/root decreased as temperature increased from 10° to 30°C. After transfer from low night temperature to higher temperatures for daily illumination, the root system was slower than aerial parts in reaching ambient temperature, causing damage to the plant. Warm water circulating slowly through the soil for a few minutes could avoid this. Stem elongation was most favoured at 10°-20°C in the night. Higher night temperatures gave fewer tillers and more leaves. Spikes developed sooner with 10°C than with 27°C at night and later with constant day-night temperatures.

Increase of daylength (8-24 h) increased stem length and decreased tiller number, and leaf number and area. Production of dry matter was highest with 16-20 h and was less with continuous light. Increasing intensities of extra illumination after normal daylight in the greenhouse increased stem length, decreased tillering, leaf formation and leaf area, and accelerated reproduction. Increase in normal illumination suppressed stem elongation, but increased number of tillers and leaves. White and red supplementary light for 3 weeks induced early flowering. Intense red light for 16 h accelerated spike initiation. The relation root/top increased with intensity.

Influence of N depended on light intensity. Low rate of N increased root/shoot ratio independently of light intensity. The relation C/N in the plant depended on N rate, photoperiod and night temperature. Early flowering usually accompanied a high C/N ratio. The relation of dry matter in heads to that in stems and leaves decreased with increasing N in both SD and LD. The absolute quantity of N in heads or stems, however, increased with high N and was mostly smaller in SD than LD.

Original languageEnglish
QualificationDoctor of Philosophy
Awarding Institution
  • Wageningen University
Supervisors/Advisors
  • Wassink, E.C., Promotor
Award date1 Jun 1956
Place of PublicationWageningen
Publisher
Publication statusPublished - 1956
Externally publishedYes

Fingerprint

night temperature
growth and development
wheat
nitrogen
lighting
stems
leaves
stem elongation
temperature
tillers
light intensity
inflorescences
photoperiod
flowering
leaf emergence
tillering
root shoot ratio
red light
carbon nitrogen ratio
dry matter accumulation

Keywords

  • triticum aestivum
  • wheat
  • hexaploidy
  • stress
  • tropics
  • subtropics
  • daylight
  • physical factors

Cite this

@phdthesis{de707b59f6d1458bb6021c372c7a745c,
title = "The interrelation between growth and development of wheat as influenced by temperature, light and nitrogen",
abstract = "Development was studied in wheat, mainly the subtropical varieties Hindi and Baladi. Leaf emergence was faster and the relation shoot/root decreased as temperature increased from 10° to 30°C. After transfer from low night temperature to higher temperatures for daily illumination, the root system was slower than aerial parts in reaching ambient temperature, causing damage to the plant. Warm water circulating slowly through the soil for a few minutes could avoid this. Stem elongation was most favoured at 10°-20°C in the night. Higher night temperatures gave fewer tillers and more leaves. Spikes developed sooner with 10°C than with 27°C at night and later with constant day-night temperatures.Increase of daylength (8-24 h) increased stem length and decreased tiller number, and leaf number and area. Production of dry matter was highest with 16-20 h and was less with continuous light. Increasing intensities of extra illumination after normal daylight in the greenhouse increased stem length, decreased tillering, leaf formation and leaf area, and accelerated reproduction. Increase in normal illumination suppressed stem elongation, but increased number of tillers and leaves. White and red supplementary light for 3 weeks induced early flowering. Intense red light for 16 h accelerated spike initiation. The relation root/top increased with intensity.Influence of N depended on light intensity. Low rate of N increased root/shoot ratio independently of light intensity. The relation C/N in the plant depended on N rate, photoperiod and night temperature. Early flowering usually accompanied a high C/N ratio. The relation of dry matter in heads to that in stems and leaves decreased with increasing N in both SD and LD. The absolute quantity of N in heads or stems, however, increased with high N and was mostly smaller in SD than LD.",
keywords = "triticum aestivum, tarwe, hexaplo{\"i}die, stress, tropen, subtropen, daglicht, fysische factoren, triticum aestivum, wheat, hexaploidy, stress, tropics, subtropics, daylight, physical factors",
author = "M.S.H. Khalil",
note = "WU thesis 207 Proefschrift Wageningen",
year = "1956",
language = "English",
publisher = "Veenman",
school = "Wageningen University",

}

Khalil, MSH 1956, 'The interrelation between growth and development of wheat as influenced by temperature, light and nitrogen', Doctor of Philosophy, Wageningen University, Wageningen.

The interrelation between growth and development of wheat as influenced by temperature, light and nitrogen. / Khalil, M.S.H.

Wageningen : Veenman, 1956. 75 p.

Research output: Thesisinternal PhD, WU

TY - THES

T1 - The interrelation between growth and development of wheat as influenced by temperature, light and nitrogen

AU - Khalil, M.S.H.

N1 - WU thesis 207 Proefschrift Wageningen

PY - 1956

Y1 - 1956

N2 - Development was studied in wheat, mainly the subtropical varieties Hindi and Baladi. Leaf emergence was faster and the relation shoot/root decreased as temperature increased from 10° to 30°C. After transfer from low night temperature to higher temperatures for daily illumination, the root system was slower than aerial parts in reaching ambient temperature, causing damage to the plant. Warm water circulating slowly through the soil for a few minutes could avoid this. Stem elongation was most favoured at 10°-20°C in the night. Higher night temperatures gave fewer tillers and more leaves. Spikes developed sooner with 10°C than with 27°C at night and later with constant day-night temperatures.Increase of daylength (8-24 h) increased stem length and decreased tiller number, and leaf number and area. Production of dry matter was highest with 16-20 h and was less with continuous light. Increasing intensities of extra illumination after normal daylight in the greenhouse increased stem length, decreased tillering, leaf formation and leaf area, and accelerated reproduction. Increase in normal illumination suppressed stem elongation, but increased number of tillers and leaves. White and red supplementary light for 3 weeks induced early flowering. Intense red light for 16 h accelerated spike initiation. The relation root/top increased with intensity.Influence of N depended on light intensity. Low rate of N increased root/shoot ratio independently of light intensity. The relation C/N in the plant depended on N rate, photoperiod and night temperature. Early flowering usually accompanied a high C/N ratio. The relation of dry matter in heads to that in stems and leaves decreased with increasing N in both SD and LD. The absolute quantity of N in heads or stems, however, increased with high N and was mostly smaller in SD than LD.

AB - Development was studied in wheat, mainly the subtropical varieties Hindi and Baladi. Leaf emergence was faster and the relation shoot/root decreased as temperature increased from 10° to 30°C. After transfer from low night temperature to higher temperatures for daily illumination, the root system was slower than aerial parts in reaching ambient temperature, causing damage to the plant. Warm water circulating slowly through the soil for a few minutes could avoid this. Stem elongation was most favoured at 10°-20°C in the night. Higher night temperatures gave fewer tillers and more leaves. Spikes developed sooner with 10°C than with 27°C at night and later with constant day-night temperatures.Increase of daylength (8-24 h) increased stem length and decreased tiller number, and leaf number and area. Production of dry matter was highest with 16-20 h and was less with continuous light. Increasing intensities of extra illumination after normal daylight in the greenhouse increased stem length, decreased tillering, leaf formation and leaf area, and accelerated reproduction. Increase in normal illumination suppressed stem elongation, but increased number of tillers and leaves. White and red supplementary light for 3 weeks induced early flowering. Intense red light for 16 h accelerated spike initiation. The relation root/top increased with intensity.Influence of N depended on light intensity. Low rate of N increased root/shoot ratio independently of light intensity. The relation C/N in the plant depended on N rate, photoperiod and night temperature. Early flowering usually accompanied a high C/N ratio. The relation of dry matter in heads to that in stems and leaves decreased with increasing N in both SD and LD. The absolute quantity of N in heads or stems, however, increased with high N and was mostly smaller in SD than LD.

KW - triticum aestivum

KW - tarwe

KW - hexaploïdie

KW - stress

KW - tropen

KW - subtropen

KW - daglicht

KW - fysische factoren

KW - triticum aestivum

KW - wheat

KW - hexaploidy

KW - stress

KW - tropics

KW - subtropics

KW - daylight

KW - physical factors

M3 - internal PhD, WU

PB - Veenman

CY - Wageningen

ER -