Ecophysiological characteristics of four maize hybrids and Abutilon theophrasti

J. L. Lindquist, D. A. Mortensen

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

Combining empirical research with simulation modelling may improve our understanding of the dynamics of crop:weed competition and for testing hypotheses on the importance of specific traits for enhancing crop performance in mixtures. Two field experiments were conducted to quantify and compare estimates of traits important for radiation interception and utilization in four maize hybrids and Abutilon theophrasti grown in monoculture. Early leaf area growth rate did not vary among maize hybrids within a year, but varied among years. The response of CO2 assimilation rate to absorbed radiation and leaf nitrogen content did not differ among hybrids. Abutilon theophrasti and two old maize hybrids partitioned more new biomass to stem relative to reproductive organs than newer hybrids. Old hybrids had greater specific leaf area during the period of most rapid growth, grew taller, and leaf area was distributed higher in their canopy. Extinction coefficients for diffuse radiation did not differ among hybrids or between years. Results suggest that these four maize hybrids may differ in their ability to intercept incident radiation, which may influence their ability to compete for light.

Original languageEnglish (US)
Pages (from-to)271-285
Number of pages15
JournalWeed Research
Volume39
Issue number4
DOIs
StatePublished - Aug 1 1999

Fingerprint

Abutilon theophrasti
maize
corn
leaf area
crop performance
crop-weed competition
extinction coefficient
hypothesis testing
monoculture
interception
nitrogen content
weed
extinction
canopy
stem
crop
stems
radiation
nitrogen
biomass

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Agronomy and Crop Science
  • Plant Science

Cite this

Lindquist, J. L. ; Mortensen, D. A. / Ecophysiological characteristics of four maize hybrids and Abutilon theophrasti. In: Weed Research. 1999 ; Vol. 39, No. 4. pp. 271-285.
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Ecophysiological characteristics of four maize hybrids and Abutilon theophrasti. / Lindquist, J. L.; Mortensen, D. A.

In: Weed Research, Vol. 39, No. 4, 01.08.1999, p. 271-285.

Research output: Contribution to journalArticle

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