Zobrazeno 1 - 10
of 21
pro vyhledávání: '"G. T. Barthram"'
Publikováno v:
Nutrient Cycling in Agroecosystems. 78:143-153
Extensive agricultural systems have been promoted all over Europe. Most studies of such systems have focused on plant species composition, while few studies have looked at soil effects. We report on an experiment at three upland sites where soil carb
Publikováno v:
Journal of Vegetation Science. 17:315-322
Questions: Do species planted outdoors in native soil differ in the timing of their period of vegetative spread during the growing season? Location: Cleish Hills, Fife, Scotland, UK. Methods: Patches (20 cm × 20 cm) of Agrostis capillaris, Festuca r
Publikováno v:
Grass and Forage Science. 60:4-16
Cattle and sheep can create and maintain a mixture of relatively tall and short patches in grass swards through selective grazing. In swards that are grazed by cattle this heterogeneous structure can result in the frequencies of height measurements h
Publikováno v:
New Phytologist. 155:257-264
Summary • Plants spread vegetatively at rates that depend on both their own and their neighbours’ traits. We tested hypotheses that such rates also interact with defoliation intensity and differ between sites. • Well-established monoculture pat
Publikováno v:
Grass and Forage Science. 57:124-136
Extensification (a reduction in fertilizer inputs and stocking rate of grassland) is seen as one way of increasing the conservation value and of reducing the environmental impact of upland sheep production in the UK, but little is known about the con
Publikováno v:
Applied Vegetation Science. 5:87-98
Due to economic pressures and policy changes Lolium perenne-Trifolium repens sown swards in upland UK sheep systems are likely to become less intensively managed. We present results from the first 5 yr of a long-term experi- ment studying vegetation
Publikováno v:
The Journal of Agricultural Science. 132:77-89
Tissue flow measurements of leaf material in Lolium perenne (perennial ryegrass), Agrostis capillaris or Poa annua, and Trifolium repens (white clover) were made at three upland sites in Scotland (Hartwood, Sourhope and Fasque) in 1992/93 to determin
Autor:
G. T. Barthram
Publikováno v:
Grass and Forage Science. 52:336-339
The morphological characteristics of Trifolium repens, grown in association with either Lolium perenne or Holcus lanatus and grazed by sheep to maintain sward surface heights of 3 cm, 5 cm and 10 cm, were measured. The lamina area, petiole length, in
Autor:
Sheila A. Grant, G. T. Barthram
Publikováno v:
Grass and Forage Science. 50:98-105
The effects of two periods of rest from grazing by sheep (either April-May or May-June) on the composition of swards of both an early-flowering (Aurora) and a late-flowering (Melle) perennial ryegrass variety grown with cither a small-leaved (Kent) o
Autor:
Sheila A. Grant, G. T. Barthram
Publikováno v:
Grass and Forage Science. 49:487-495
In a range of perennial ryegrass/white clover swards, variation in the surface heights of the grass and clover components, the rates of increase of these surface heights and the specific leaf areas (SLAs) of ryegrass and white clover were described f