scholarly journals Suppressive effect of some forage plants on the growth of Ambrosia artemisiifolia and Iva xanthiifolia

2010 ◽  
Vol 25 (2) ◽  
pp. 171-176 ◽  
Author(s):  
Senka Milanova ◽  
Vladimir Vladimirov ◽  
Svetla Maneva
Keyword(s):  
Plant Species ◽  
Reliable Method ◽  
Dactylis Glomerata ◽  
Suppressive Effect ◽  
Ambrosia Artemisiifolia ◽  
Forage Plants ◽  
Medicago Sativa L ◽  
Greenhouse Screening ◽  
Dactylis Glomerata L

A pot trial in greenhouse conditions has been carried out to investigate the role of some plant species in suppression of Ambrosia artemisiifolia and Iva xanthiifolia growth. Screening of several plant species (Medicago sativa L., Lolium perenne L., Dactylis glomerata L. and Elymus repens (L.) Gould - all from both turf and seeds) was conducted. The results of the experiment showed that some perennial plants, especially L. perenne, D. glomerata and M. sativa, can be a reliable means of suppression of the growth and seed production of A. artemisiifolia and I. xanthiifolia. Moreover, simple greenhouse screening turned to be a reliable method for predicting this potential suppressive role under certain conditions.

NITROGENASE ACTIVITY OF ALFALFA GROWN ALONE AND IN MIXTURE WITH GRASS UNDER GREENHOUSE CONDITIONS

1985 ◽  
Vol 65 (3) ◽  
pp. 787-791
Author(s):  
H. A. BURITY ◽  
B. E. COULMAN ◽  
M. A. FARIS
Keyword(s):  
Medicago Sativa ◽  
Nitrogenase Activity ◽  
Dactylis Glomerata ◽  
Phleum Pratense ◽  
Bromus Inermis ◽  
Smooth Bromegrass ◽  
Medicago Sativa L ◽  
Dactylis Glomerata L ◽  
Phleum Pratense L ◽  
Nodule Tissue

A greenhouse experiment has shown that total nitrogenase activity of alfalfa (Medicago sativa L.) is not significantly affected when grown in association with timothy (Phleum pratense L.), smooth bromegrass (Bromus inermis Leyss) or orchardgrass (Dactylis glomerata L.) except after initial harvest when decreased alfalfa activity was associated with smooth bromegrass or orchardgrass. It was concluded that mixed cultures of alfalfa with timothy, smooth bromegrass or orchardgrass have no effect on alfalfa N2 fixation. The results also suggest the occurrence of N transference from alfalfa to associated grasses. It is speculated that this transfer is not primarily due to the death of roots and nodule tissue (after harvest), but involves some degree of N excretion during the period before initial harvest.Key words: Alfalfa-grass mixtures, N2-fixation, nodule activity, N-transference

A genetic view on the role of prolonged drought stress and mating systems on post-drought recovery, persistence and drought memory of orchardgrass (Dactylis glomerata L.)

Euphytica ◽  
2020 ◽  
Vol 216 (6) ◽  
Author(s):  
Fatemeh Saeidnia ◽  
Mohammad Mahdi Majidi ◽  
Aghafakhr Mirlohi ◽  
Soheila Spanani ◽  
Zohreh Karami ◽  
...  
Keyword(s):  
Drought Stress ◽  
Mating Systems ◽  
Dactylis Glomerata ◽  
Prolonged Drought ◽  
Drought Recovery ◽  
Dactylis Glomerata L

scholarly journals The use of compressed height to estimate the yield of a differently fertilized meadow

2018 ◽  
Vol 64 (No. 2) ◽  
pp. 76-81 ◽  
Author(s):  
Cudlín Ondřej ◽  
Hakl Josef ◽  
Hejcman Michal ◽  
Cudlín Pavel
Keyword(s):  
Plant Species ◽  
Nitrogen Fertilization ◽  
Dry Matter ◽  
Vascular Plant ◽  
Dactylis Glomerata ◽  
Urtica Dioica ◽  
Plant Species Composition ◽  
Dry Matter Yield ◽  
The Czech Republic ◽  
Dactylis Glomerata L

Monitoring of grassland dry matter yield (DMY) is important for the economy and ecosystem management, but it is a time-consuming process. Calculating the correlation between compressed height (CH) and DMY is a faster way to estimate DMY. The aim of our study was to use CH in order to predict DMY for a meadow with different fertilization management and plant species composition. Four fertilization treatments and one unfertilized control were established in a mesophilic meadow in the Czech Republic. Using a rising plate meter (RPM), CH was measured before the first and second cuts. In addition, the cover of individual vascular plant species was estimated. Significant correlations between CH and DMY were ranging from 0.41 to 0.79 for treatments without nitrogen fertilization in the first and second cuts; for treatments with nitrogen fertilization there was a significant correlation only in the second cut. According to our results, the RPM method seems to be suitable for a rough DMY estimate for meadows with coverage of about 60% grasses, 10% legumes and 30% forbs. However, considerable changes in the cover of tall forbs (e.g. Urtica dioica L.) or tall grasses (e.g. Dactylis glomerata L.) could be the main sources of DMY estimation inaccuracy.

The effect of feeding hay before fresh alfalfa on the occurrence of frothy bloat in cattle

2008 ◽  
Vol 88 (1) ◽  
pp. 29-31 ◽  
Author(s):  
W. Majak ◽  
G. J. Garland ◽  
T. J. Lysyk
Keyword(s):  
Medicago Sativa ◽  
Key Words ◽  
Dactylis Glomerata ◽  
Alfalfa Hay ◽  
Medicago Sativa L ◽  
Dactylis Glomerata L ◽  
Effect Of Feeding

Alfalfa or orchardgrass hay was fed to cattle before feeding fresh alfalfa herbage at the vegetative to early bud stage of growth to observe the subsequent impact on bloat. Alfalfa hay supplements reduced the incidence of bloat by a third in one trial, but no effect was seen in a second trial. In contrast, supplements of orchardgrass hay reduced the occurrence of bloat by > 90% in 2 yr of trials. Supplemental orchardgrass hay can be effective in the control of pasture bloat. Key words: Steers, frothy bloat, Medicago sativa L., Dactylis glomerata L., hay supplements

DIVIDEND VL orchardgrass

2011 ◽  
Vol 91 (4) ◽  
pp. 793-795
Author(s):  
S. R. Bowley ◽  
D. Hancock
Keyword(s):  
Medicago Sativa ◽  
Binary Mixtures ◽  
Biomass Yield ◽  
Dactylis Glomerata ◽  
Pure Stand ◽  
Eastern Canada ◽  
Medicago Sativa L ◽  
Dactylis Glomerata L ◽  
The University

Bowley, S. R. and Hancock, D. 2011. DIVIDEND VL orchardgrass. Can. J. Plant Sci. 91: 793–795. DIVIDEND VL is a late-maturing orchardgrass (Dactylis glomerata L.) cultivar for silage and hay production in mixtures with alfalfa (Medicago sativa L.) in eastern Canada. The population was developed at the University of Guelph, Guelph, ON. DIVIDEND VL matured at a slower rate when grown in pure stand and in binary mixtures with alfalfa compared with the cultivars OKAY and Rapido. When harvested at the same date, DIVIDEND VL averaged 7% lower in biomass yield compared with OKAY, but the herbage was less advanced in its maturity.

scholarly journals CARACTERIZACIÓN DEL RENDIMIENTO DE FORRAJE DE UNA PRADERA DE ALFALFA-OVILLO AL VARIAR LA FRECUENCIA E INTENSIDAD DEL PASTOREO

2012 ◽  
Vol 35 (3) ◽  
pp. 259
Author(s):  
Alfonso Hernández-Garay ◽  
Pedro A. Martínez-Hernández ◽  
Job Zaragoza-Esparza ◽  
Humberto Vaquera-Huerta ◽  
Fernando Osnaya-Gallardo ◽  
...  
Keyword(s):  
Medicago Sativa ◽  
Dactylis Glomerata ◽  
Medicago Sativa L ◽  
Dactylis Glomerata L

Con la finalidad de determinar durante un año el comportamiento del rendimiento de forraje en una pradera de alfalfa-ovillo (Medicago sativa L. – Dactylis glomerata L.) al variar la frecuencia e intensidad de pastoreo, se evaluaron seis tratamientos resultantes de la combinación factorial de dos frecuencias (alta y baja) y tres intensidades de pastoreo (ligera, media y severa, con alturas de forraje residual de 3 a 6, 7 a 10 y 11 a 14 cm, respectivamente), en un diseño de bloques al azar con cuatro repeticiones. La unidad experimental fue una parcela de 100 m2. Para el pastoreo se emplearon borregos ‘Columbia’, sin ser sujetos de medición alguna. La interacción de los factores no mostró efecto en variable alguna. El rendimiento anual de forraje fue mayor (4 %) con alta frecuencia de pastoreo y el pastoreo severo (3 a 6 cm) generó 19 % más rendimiento anual de forraje. Los pastoreos frecuentes y severos favorecieron un mayor rendimiento de forraje de la pradera alfalfaovillo, pero también permitieron la invasión por malezas lo que puede reducir la persistencia de la pradera. El patrón de respuesta de la alfalfa en producción de forraje a los cambios en la intensidad de pastoreo fue diferente al del ovillo.

Effect of grazing mixtures of alfalfa and orchardgrass grown in strips on the incidence of bloat in cattle

2010 ◽  
Vol 90 (1) ◽  
pp. 109-112 ◽  
Author(s):  
D M Veira ◽  
T J Lysyk ◽  
D J Thompson ◽  
G J Garland ◽  
W Majak
Keyword(s):  
Medicago Sativa ◽  
Key Words ◽  
Free Choice ◽  
Early Stage ◽  
Dactylis Glomerata ◽  
Medicago Sativa L ◽  
Dactylis Glomerata L

Steers were grazed on pastures with alfalfa and orchardgrass grown in monoculture strips with alfalfa covering 100, 75 or 50% of the ground area. The forages were maintained at an early stage of growth during the trial. The incidence of frothy bloat in cattle was reduced by 70 to 90% when grass was a component of the pasture. Given unconstrained free choice, the legume was preferred over the grass by steers. Key words: Steers, frothy bloat, Medicago sativa L., Dactylis glomerata L., mixed pastures, grazing

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