Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Functional attributes  (1)
  • Holcus lanatus  (1)
  • 1
    Electronic Resource
    Electronic Resource
    An index of weed size for assessing the soil productivity of ancient crop fields (1998)
    Springer
    Vegetation history and archaeobotany 7 (1998), S. 17-22 
    Details
    ISSN: 1617-6278
    Keywords: Weed ecology ; Crop husbandry ; Soil productivity ; Functional attributes ; CSR strategy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Archaeology , Biology
    Notes: Abstract A method is presented for generating data on archaeological weed species relevant to soil productivity and consequently crop husbandry. Three plant attributes (maximum canopy height, maximum canopy spread and maximum dry leaf weight per node) which are functionally related to habitat productivity were measured for 161 British annual species. These three attributes were combined to produce an index of weed size. Index values were found to differ significantly between character species of phytosociological classes from fertile and infertile habitats and to provide an objective assessment of CSR (Competitor/Stress-tolerator/Ruderal) strategysensu Grime (1974, 1979). Further work is required, however, to distinguish ‘medium-sized’ species that exploit highly disturbed and productive habitats from those of less disturbed and less productive situations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01393414
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Variation in condensed tannin concentration of a temperate grass (Holcus lanatus) in relation to season and reproductive development (1995)
    Springer
    Journal of chemical ecology 21 (1995), S. 1103-1112 
    Details
    ISSN: 1573-1561
    Keywords: Condensed tannin ; Holcus lanatus ; flowering ; vegetative ; seasonal variation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Holcus lanatus, a temperate grass, was found to contain low but measurable concentrations of condensed tannins (CT), according to the vanillin-HCl and the butanol-HCl methods. The variation in CT concentrations between different types of tissue including leaf age and reproductive versus nonreproductive tissue was examined. There was no evidence that floral tissue contained more CT than nonreproductive tissue. A sequential extraction and analysis procedure showed a decreasing proportion of free-unbound CT and greater preponderance of protein-bound and fiber-bound CT with increasing leaf age and in dead matter. Samples collected from an agricultural pasture on two sampling dates, January 24 and March 5, 1993, showed short-term temporal variation in free-unbound CT.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02228314
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...