SEEDLING GROWTH OF FOUR AGROPYRON SPECIES

Seedling Growth of Three Switchgrass Strains

“…Thus, leaf area and leaf blade dry weights followed similar patterns, which agrees with the results of Johnston et al (1972) for wheatgrasses. ' Numbers within rows and columns for each growth parameter followed by the same letter do not differ at the 5% level using Duncan's New Multiple Range test.…”

“…numbers of leaves and stems per plant at each harvest ( Table Literature No significant difference existed among strains for RGR and NAR (Table 4). Johnston et al (1972) reported no significant differences for RGR and NAR among four wheatgrasses but did report significant differences in leaf blade and stem axis dry weights as we are reporting. Among selections of the four wheatgrasses studied by Johnston et al (1972), plants of Agropyron repens (L.) Beauv.…”

“…Johnston et al (1972) reported no significant differences for RGR and NAR among four wheatgrasses but did report significant differences in leaf blade and stem axis dry weights as we are reporting. Among selections of the four wheatgrasses studied by Johnston et al (1972), plants of Agropyron repens (L.) Beauv. produced 100% more forage at all sampling periods than did those of Agropyron desertorum (L.) Gaertn., but the relative growth rates were similar.…”

“…The initial amount of photosyntht area and seedling vigor is determined largely by the amount initial capital, which is measured as seed weight (Black, 19 Beveridge and Wilsie, 1959;and Stickler and Wassom, 19f Relative growth rate (RGR) has been reported to b m useful tool in studying differences in seedling vigor (Cool 1967;Johnston et al, 1972;and Radford, 1967). RGR measure of the weight increase per unit of plant weight pres per unit of time (g/g/wk).…”

“…The use of gro! analysis formulae offers a quantitative way to docum rapidity of seedling growth characteristics (Cooper, 1967;i Johnston et al, 1972).…”