The Experts below are selected from a list of 306 Experts worldwide ranked by ideXlab platform
R.d. Williams - One of the best experts on this subject based on the ideXlab platform.
-
seeding cool season grasses into unimproved warm season pasture in the southern great plains of the united states
Grass and Forage Science, 2008Co-Authors: P W Bartholomew, R.d. WilliamsAbstract:Limited availability of herbage during the cool season creates a problem of a supply of nutrients for livestock producers throughout the southern Great Plains of the USA and, particularly, on small farms where resource constraints limit possible mitigating strategies. Six cool-season grasses were individually sown into clean-tilled ground, no-till drilled into stubble of Korean lespedeza [Kummerowia stipulacea (Maxim) Makino] or no-till over-sown into dormant unimproved warm-season pastures. The dry matter (DM) yields of mixtures of cool and warm-season herbage species were measured to test their potential for increasing cool-season herbage production in a low-input pasture environment. Only mixtures containing Italian ryegrass (Lolium multiflorum Lam) produced greater year-round DM yields than undisturbed warm-season pasture with all establishment methods. When cool-season grass was no-till seeded into existing warm-season pasture, there was on average a 0·61 kg DM increase in year-round herbage production for each 1·0 kg DM of cool-season grass herbage produced. Sowing into stubble of Korean lespedeza, or into clean-tilled ground, required 700 or 1400 kg DM ha−1, respectively, of cool-season production before the year-round DM yield of each species equalled that of undisturbed warm-season pasture. Productive pastures of perennial cool-season grasses were not sustained beyond two growing seasons with tall wheatgrass [Elytrigia elongata (Host) Nevski], intermediate wheatgrass [Elytrigia intermedia (Host) Nevski] and a creeping wheatgrass (Elytrigia repens L.) × bluebunch wheatgrass [Pseudoroegneria spicata (Pursh)] hybrid. Lack of persistence and low productivity limit the usefulness of cool-season perennial grasses for over-seeding unimproved warm-season pasture in the southern Great Plains.
-
Seeding cool‐season grasses into unimproved warm‐season pasture in the southern Great Plains of the United States
Grass and Forage Science, 2008Co-Authors: P W Bartholomew, R.d. WilliamsAbstract:Limited availability of herbage during the cool season creates a problem of a supply of nutrients for livestock producers throughout the southern Great Plains of the USA and, particularly, on small farms where resource constraints limit possible mitigating strategies. Six cool-season grasses were individually sown into clean-tilled ground, no-till drilled into stubble of Korean lespedeza [Kummerowia stipulacea (Maxim) Makino] or no-till over-sown into dormant unimproved warm-season pastures. The dry matter (DM) yields of mixtures of cool and warm-season herbage species were measured to test their potential for increasing cool-season herbage production in a low-input pasture environment. Only mixtures containing Italian ryegrass (Lolium multiflorum Lam) produced greater year-round DM yields than undisturbed warm-season pasture with all establishment methods. When cool-season grass was no-till seeded into existing warm-season pasture, there was on average a 0·61 kg DM increase in year-round herbage production for each 1·0 kg DM of cool-season grass herbage produced. Sowing into stubble of Korean lespedeza, or into clean-tilled ground, required 700 or 1400 kg DM ha−1, respectively, of cool-season production before the year-round DM yield of each species equalled that of undisturbed warm-season pasture. Productive pastures of perennial cool-season grasses were not sustained beyond two growing seasons with tall wheatgrass [Elytrigia elongata (Host) Nevski], intermediate wheatgrass [Elytrigia intermedia (Host) Nevski] and a creeping wheatgrass (Elytrigia repens L.) × bluebunch wheatgrass [Pseudoroegneria spicata (Pursh)] hybrid. Lack of persistence and low productivity limit the usefulness of cool-season perennial grasses for over-seeding unimproved warm-season pasture in the southern Great Plains.
P W Bartholomew - One of the best experts on this subject based on the ideXlab platform.
-
seeding cool season grasses into unimproved warm season pasture in the southern great plains of the united states
Grass and Forage Science, 2008Co-Authors: P W Bartholomew, R.d. WilliamsAbstract:Limited availability of herbage during the cool season creates a problem of a supply of nutrients for livestock producers throughout the southern Great Plains of the USA and, particularly, on small farms where resource constraints limit possible mitigating strategies. Six cool-season grasses were individually sown into clean-tilled ground, no-till drilled into stubble of Korean lespedeza [Kummerowia stipulacea (Maxim) Makino] or no-till over-sown into dormant unimproved warm-season pastures. The dry matter (DM) yields of mixtures of cool and warm-season herbage species were measured to test their potential for increasing cool-season herbage production in a low-input pasture environment. Only mixtures containing Italian ryegrass (Lolium multiflorum Lam) produced greater year-round DM yields than undisturbed warm-season pasture with all establishment methods. When cool-season grass was no-till seeded into existing warm-season pasture, there was on average a 0·61 kg DM increase in year-round herbage production for each 1·0 kg DM of cool-season grass herbage produced. Sowing into stubble of Korean lespedeza, or into clean-tilled ground, required 700 or 1400 kg DM ha−1, respectively, of cool-season production before the year-round DM yield of each species equalled that of undisturbed warm-season pasture. Productive pastures of perennial cool-season grasses were not sustained beyond two growing seasons with tall wheatgrass [Elytrigia elongata (Host) Nevski], intermediate wheatgrass [Elytrigia intermedia (Host) Nevski] and a creeping wheatgrass (Elytrigia repens L.) × bluebunch wheatgrass [Pseudoroegneria spicata (Pursh)] hybrid. Lack of persistence and low productivity limit the usefulness of cool-season perennial grasses for over-seeding unimproved warm-season pasture in the southern Great Plains.
-
Seeding cool‐season grasses into unimproved warm‐season pasture in the southern Great Plains of the United States
Grass and Forage Science, 2008Co-Authors: P W Bartholomew, R.d. WilliamsAbstract:Limited availability of herbage during the cool season creates a problem of a supply of nutrients for livestock producers throughout the southern Great Plains of the USA and, particularly, on small farms where resource constraints limit possible mitigating strategies. Six cool-season grasses were individually sown into clean-tilled ground, no-till drilled into stubble of Korean lespedeza [Kummerowia stipulacea (Maxim) Makino] or no-till over-sown into dormant unimproved warm-season pastures. The dry matter (DM) yields of mixtures of cool and warm-season herbage species were measured to test their potential for increasing cool-season herbage production in a low-input pasture environment. Only mixtures containing Italian ryegrass (Lolium multiflorum Lam) produced greater year-round DM yields than undisturbed warm-season pasture with all establishment methods. When cool-season grass was no-till seeded into existing warm-season pasture, there was on average a 0·61 kg DM increase in year-round herbage production for each 1·0 kg DM of cool-season grass herbage produced. Sowing into stubble of Korean lespedeza, or into clean-tilled ground, required 700 or 1400 kg DM ha−1, respectively, of cool-season production before the year-round DM yield of each species equalled that of undisturbed warm-season pasture. Productive pastures of perennial cool-season grasses were not sustained beyond two growing seasons with tall wheatgrass [Elytrigia elongata (Host) Nevski], intermediate wheatgrass [Elytrigia intermedia (Host) Nevski] and a creeping wheatgrass (Elytrigia repens L.) × bluebunch wheatgrass [Pseudoroegneria spicata (Pursh)] hybrid. Lack of persistence and low productivity limit the usefulness of cool-season perennial grasses for over-seeding unimproved warm-season pasture in the southern Great Plains.
Juul Limpens - One of the best experts on this subject based on the ideXlab platform.
-
Does salt stress constrain spatial distribution of dune building grasses Ammophila arenaria and Elytrichia juncea on the beach
Ecology and evolution, 2017Co-Authors: M.e.b. Van Puijenbroek, N. Meijdam, Imma Oliveras, Frank Berendse, Corry Teichmann, Juul LimpensAbstract:Rising sea levels threaten coastal safety by increasing the risk of flooding. Coastal dunes provide a natural form of coastal protection. Understanding drivers that constrain early development of dunes is necessary to assess whether dune development may keep pace with sea-level rise. In this study, we explored to what extent salt stress experienced by dune building plant species constrains their spatial distribution at the Dutch sandy coast. We conducted a field transplantation experiment and a glasshouse experiment with two dune building grasses Ammophila arenaria and Elytrigia juncea. In the field, we measured salinity and monitored growth of transplanted grasses in four vegetation zones: (I) nonvegetated beach, (II) E. juncea occurring, (III) both species co-occurring, and (IV) A. arenaria dominant. In the glasshouse, we subjected the two species to six soil salinity treatments, with and without salt spray. We monitored biomass, photosynthesis, leaf sodium, and nutrient concentrations over a growing season. The vegetation zones were weakly associated with summer soil salinity; zone I and II were significantly more saline than zones III and IV. Ammophila arenaria performed equally (zone II) or better (zones III, IV) than E. juncea, suggesting soil salinity did not limit species performance. Both species showed severe winter mortality. In the glasshouse, A. arenaria biomass decreased linearly with soil salinity, presumably as a result of osmotic stress. Elytrigia juncea showed a nonlinear response to soil salinity with an optimum at 0.75% soil salinity. Our findings suggest that soil salinity stress either takes place in winter, or that development of vegetated dunes is less sensitive to soil salinity than hitherto expected.
-
Dataset: Does salt stress constrain spatial distribution of dune building species Ammophila arenaria and Elytrigia juncea?
2017Co-Authors: M.e.b. Van Puijenbroek, C. Teichman, N. Meijdam, Imma Oliveras, Frank Berendse, Juul LimpensAbstract:Data published in paper: Van Puijenbroek, M.E.B., Teichman, C., Meijdam, N., Oliveras, I., Berendse, F., Limpens, J. (2017) Does salt stress constrain spatial distribution of dune building grasses Ammophila arenaria and Elytrigia juncea on the beach? Ecology and Evolution.The study consist of three parts1. Field transplant experiment with two dune building grasses 2. Soil salinity measurements in the field 3. Glasshouse experiment with two dune building grassesFor more information check the readme file in the zip file.
J.r. Seoane - One of the best experts on this subject based on the ideXlab platform.
-
Forage quality, productivity and feeding value to beef cattle of quackgrass (Elytrigia repens (L.) Nevski.) compared with timothy (Phleum pratense L.)
Animal Feed Science and Technology, 1994Co-Authors: Y. Martineau, G.d. Leroux, J.r. SeoaneAbstract:Abstract Field and animal feeding experiments were conducted in 1989 at the Station agronomique de l'Universite Laval near Quebec City to compare quackgrass (Elytrigia repens (L.) Nevski.) with timothy (Phleum pratense L.) hay in terms of forage quality, productivity and feeding value. Timothy stands infested with 0, 50 or 100% quackgrass were cut at early heading and fed to Charolais × Simmental growing heifers. Quackgrass forage contained more (P
Zhenglong Ren - One of the best experts on this subject based on the ideXlab platform.
-
characterization and chromosomal location of pm40 in common wheat a new gene for resistance to powdery mildew derived from Elytrigia intermedium
Theoretical and Applied Genetics, 2009Co-Authors: Peigao Luo, H Y Luo, Z J Chang, Huaiyu Zhang, Min Zhang, Zhenglong RenAbstract:Powdery mildew, caused by Blumeria graminis f. sp. tritici, is a very destructive wheat (Triticum aestivum) disease. Resistance was transferred from Elytrigia intermedium to common wheat by crossing and backcrossing, and line GRY19, that was subsequently selected, possessed a single dominant gene for seedling resistance. Five polymorphic microsatellite markers, Xgwm297, Xwmc335, Xwmc364, Xwmc426 and Xwmc476, on chromosome arm 7BS, were mapped relative to the powdery mildew resistance locus in an F2 population of Mianyang 11/GRY19. The loci order Xwmc426–Xwmc335–Pm40–Xgwm297–Xwmc364–Xwmc476, with 5.9, 0.2, 0.7, 1.2 and 2.9 cM genetic distances, was consistent with published maps. The resistance gene transferred from Elytrigia intermedium into wheat line GRY19 was novel, and was designated Pm40. The close flanking markers will enable marker assisted transfer of this gene into wheat breeding populations.