National use of grassland

Woodford, E. K.; Morrison, John C.

doi:10.1111/j.1744-7348.1971.tb02929.x

Cited by 3 publications

(2 citation statements)

References 2 publications

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“…In contrast, H. lanatus, F. rubra and, especially, A. stolonifera produced comparatively high DM yields of reasonable quality at this low N level. This suggests that the status of these species should be reconsidered, especially as they occupy a major position in British grassland the vast majority of which receives less than 60 kg ha -1 per year (Woodford and Morrison, 1971). It is because species such as Agrostis, Festuca and Holcus can survive under low levels of soil N that they have come to be associated with low production (Mudd, 1965) and have been assumed to be poor producers.…”

Section: Merits and Drawbacks Of Indioidual Speciesmentioning

confidence: 99%

The seasonal productivity, quality and response to nitrogen of four indigenous grasses compared with Lolium perenne

Haggar

1976

Grass and Forage Science

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To rectify the lack of comparative data on the productivity of some commonly occurring indigenous grasses, seasonal growth curves were obtained during the first year of a 3-year study by harvesting monoculture plots of Holcus lanatus, Agrostis stolonifera, Festuca rubra, Poa trivialis and Lolium perenne (cv. S23) at monthly intervals in a staggered sequence. Under conditions of high soil fertility (40 kg ha"' N per defoliation and frequent irrigation) the daily production of dry matter by P. trivialis followed the familiar two-peaked pattern of L. perenne, albeit at a lower level after flowering. By comparison, F. rubra and A. stolonifera grew more uniformly throughout the year; H. lanatus, like F. rubra, was noticeable for its high productivity after midsummer. With monthly cutting all four indigenous grasses had a higher mean nitrogen content compared with L. perenne; mean digestibilities were also comparable with the exception of F. rubra.During the second year, when inputs of nitrogen and moisture were lower, primary spring growth was most rapid with H, lanatus and F. rubra but the high digestibility of L. perenne meant that harvesting could be delayed to obtain the most forage of a given D-value. Regrowth, measured from cuts taken in" early August and September, was greatest with A. stolonifera and F. rubra respectively.Dry-matter responses to a total of 60 and 180 kg ha~' N, applied in three applications on a split-plot basis, were recorded during the last year. Apart from the early nitrogen application, the indigenous grasses Correspondence: Dr R. J. Haggar, ARC Weed Research Organization, Begbroke Hill, Yamton, Oxford. OX5 lPF. responded well, except for A. stolonifera, especially after flowering. Though the response of L. perenne was consistently high throughout the summer, at least 20 kg DM per kg N, it yielded least of all the grasses at the low nitrogen level.The agricultural significance of these results are discussed. It is concluded that whereas L. perenne performs well at high levels of nitrogen and moisture, the other species do better than L. perenne, especially during mid-season, when these factors are limiting.

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Section: Merits and Drawbacks Of Indioidual Speciesmentioning

confidence: 99%

The seasonal productivity, quality and response to nitrogen of four indigenous grasses compared with Lolium perenne

Haggar

1976

Grass and Forage Science

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“…This could be a major contribution towards the solution of the problem of maintaining a high proportion of desirable grasses in long-term pastures. At present, much grassland in Great Britain loses more than half the sown grasses within three years of sowing (WOODFORD & MORRISON, 1971). Thus there is plenty of scope for a high-quality persistent cultivar which can be given a competitive advantage over weed grasses by occasional applications of selective herbicide.…”

Section: And Discussionmentioning

confidence: 99%

Heritability of paraquat tolerance in Lolium perenne L.

Faulkner¹

1974

Euphytica

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Paraquat tolerance has been studied in an experimental population of Lolium perenne. After applying various concentrations of the herbicide, eye assessments of damage were made, and yield responses recorded. There was a quantitative pattern of variation; heritability was studied by analyzing (a) variation within and between families of half-sibs, and (b) the regression of progeny on their female parent. Heritability values were mostly in the range 0.51 to 0.72. It is concluded that it would be possible to increase tolerance to paraquat by selection, and that selection on eye assessment would be almost as effective as selection on yield response.

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Herbicides and grassland improvement

Haggar

1976

Pestic. Sci.

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Under normal systems of grassland management, most sown swards become invaded by weed grasses. This ingress is usually associated with a depletion in the size and number of the sown species. Selective herbicides can be used to combat this grass invasion and the results of two experiments are presented to show how low-dose dalapon in mid-July can be used for this purpose. When the sown grasses are too severely depleted, some method of introducing seed is required. A new one-pass technique is now being developed for establishing grass and clover seed into existing swards. After sowing, ways of increasing the clover content are being studied, based on the use of grass-suppressing herbicides in late winter. In one experiment several-fold increases in clover growth were recorded 5 months after applying carbetamide (2.8 kg/ha) and propyzamide (0.8 kg/ha).

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National use of grassland

Cited by 3 publications

References 2 publications

The seasonal productivity, quality and response to nitrogen of four indigenous grasses compared with Lolium perenne

The seasonal productivity, quality and response to nitrogen of four indigenous grasses compared with Lolium perenne

Heritability of paraquat tolerance in Lolium perenne L.

Herbicides and grassland improvement

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