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Variation in biomass and chemical composition of dominant rangeland plants during the growing season. I. Changes in biomass, and ratios between roots, shoots, stems, leaves and flowers



Variation in biomass and chemical composition of dominant rangeland plants during the growing season. I. Changes in biomass, and ratios between roots, shoots, stems, leaves and flowers



Turkish Journal of Agriculture and Forestry 23(Supplement 2): 487-494



Studies on crested wheatgrass (Agropyron cristatum), subalpine brome (Bromus tomentellus), sheep's fescue (Festuca ovina), junegrass (Koeleria cristata , needlegrass (Stipa lagascae), hybrid alfalfa (Medicago varia) and cat thyme (Teucrium polium) collected during the growing season of 1994 from protected rangelands in Erzurum area, Turkey, showed that plant height increased slowly at the start of vegetative growth, accelerated in the middle of the vegetative growth stage and levelled off after flowering. The accumulation of below- and aboveground biomass was similar to the trend of height growth. Root:stem ratios were highest at the beginning of growth, after which they steadily decreased, especially after stem elongation. While the leaf ratio was highest at the beginning of growth, it steadily decreased after the stem elongation stage.

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