Seasonal variation in the vertical distribution of white clover stolons in grazed swards

Hay, M. J. M.; Chapman, D. F.; Hay, R. J. M.; Pennell, C. G. L.; Woods, P. W.; Fletcher, R. H.

doi:10.1080/00288233.1987.10430470

Cited by 37 publications

(25 citation statements)

References 10 publications

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“…Despite the importance of white clover in New Zealand dairy pastures, there are no published studies of its growth and morphology in this situation. This contrasts with one of the few detailed studies of white clover growth and morphology, located in sheep-grazed swards in the Manawatu region of New Zealand (Hay 1983;Hay & Chapman 1984;Brock et al 1988;Hay et al 1988Hay et al , 1989a.…”

Section: Introductionmentioning

confidence: 41%

“…The vertical pattern of clover stolon distribution in Waikato dairy pastures was similar to that in Manawatu sheep-grazed pastures except that in the former the surface stolon component was the largest whereas in the latter most stolons were buried (Hay 1983;Hay et al 1983;Hay & Chapman 1984). The proportion of buried stolon in dairy cattle-grazed pastures increased during spring but never to the extent recorded for Manawatu sheepgrazed pastures (Hay 1983;Hay et al 1983).…”

Section: Discussionmentioning

confidence: 68%

“…One reason for the higher proportions of aerial and surface stolon in cattle-grazed than in sheep-grazed pasture, is that cattle do not graze down as far as sheep and therefore more aerial and surface stolons remain untouched. Since most stolon burial, particularly in early winter, is caused by earthwormcasting (Hay 1983;Hay et al 1987), site differences in the size of earthworm populations also affect the proportion of stolon which is buried. The mean earthworm population at the trial site (660/m 2 ) was lower than that measured in a number of other New Zealand sites (Hay et al 1987) where the proportion of buried stolon was generally higher.…”

Section: Discussionmentioning

confidence: 99%

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White clover growth and morphology in dairy pasture in the Waikato region of northern New Zealand

Harris¹

1994

New Zealand Journal of Agricultural Research

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Seasonal changes in clover plant growth and structure in a Waikato dairy pasture were monitored over 1 year. Pasture plugs and clover plants separated from turves were removed from paddocks before grazing. They provided data on clover plant density, total stolon biomass, vertical distribution of stolons in the sward, and various morphological characteristics. Plant density averaged 610 plants/m 2 which was higher than that recorded in a comparable study of Manawatu sheepgrazed pastures. Stolon biomass was also greater in the dairy pasture; most of this stolon was on the soil surface (58%) whereas in sheep-grazed pastures most was buried. The proportion of stolon within each class varied throughout the year. Clover plants fragmented during spring as was shown for Manawatu sheep pastures. Plant density therefore peaked during spring while values for plant morphological characteristics were low since most of the clover population comprised small, 1 st-order plants. Overall, clover plants in Waikato dairy pastures were larger than those in Manawatu sheepgrazed swards. These differences probably resulted from interactions between several factors including cultivar, climate, soil type, companion species, farm management, and grazing effects.

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Section: Introductionmentioning

confidence: 41%

Section: Discussionmentioning

confidence: 68%

Section: Discussionmentioning

confidence: 99%

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White clover growth and morphology in dairy pasture in the Waikato region of northern New Zealand

Harris¹

1994

New Zealand Journal of Agricultural Research

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“…The stolons of SS pastures were thinner and more branched than those of RS pastures, with stolons of CS pastures intermediate ). Similar differences in morphology of white clover in hill swards under SS and RS sheep grazing management (Hay & Chapman 1984) were associated with genetic differences in the white clover populations (Chapman 1983). Thus, there could have been similar shifts in the genetic composition of the white clover populations in the 3 swards of this grazing management study.…”

Section: Discussionmentioning

confidence: 63%

Effect of grazing management and season on nitrogen and phosphorus content of leaves and stolons of white clover in mixed swards

Hay¹,

Nes²,

Robertson³

1985

New Zealand Journal of Experimental Agriculture

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To cite this article: M. J. M. Hay , P. Nes & M. R. Robertson (1985) Effect of grazing management and season on nitrogen and phosphorus content of leaves and stolons of white clover in mixed swards, New Zealand Journal of Experimental Agriculture, 13:3, 209-214, DOI: 10.1080/03015521.1985 The nitrogen (N) and phosphorus (P) contents of leaf, surface stolon, and buried stolon of white clover (Trifolium repens L.) were measured in samples taken every 2 months, from pasture under rotational grazing by cattle (RGC) and set stocking by sheep (SSS), for 3 years. The effect of the system of grazing management of sheep on Nand P content of 3 herbage classes of white clover was examined during a I-year period by analysing samples taken monthly from pastures with 3 different management backgrounds; set stocked (SS), rotationally grazed (RS) or set stocked from lambing to drafting, then rotationally grazed for the rest of the year (CS). In the 3-year study, the content of N did not differ between the RGC and SSS treatments but the mean values of 4.59% in leaf, 2.75% in surface stolon, and 2.22% in buried stolon all differed. However, P contents differed between treatments: with RGC treatment, mean P levels decreased (0.43, 0.29, and 0.23% for leaf, surface stolon, and buried stolon respectively) whereas, with SSS treatment, contents in each of the respective herbage classes were higher and differences among the herbage classes were much smaller, the only significant difference occurring with buried stolon (0.51,0.51, and 0.47% for leaf, surface stolon, and buried stolon respectively). The system of sheep grazing management affected both Nand P contents in the same manner, with contents decreasing in the order SS > CS > RS. Again, there was a marked decrease in mean N content of the herbage classes in the order leaf (4.35%), surface stolon (2.97%), and buried stolon (2.11%), whereas the mean P contents of the herbage classes differed Received 21 March 1985. revision 10 May 1985 much less, with buried stolon (0.43%) being lower than leaf and surface stolon (both 0.51%). Seasonal variation in both Nand P content of each of the herbage classes in both studies followed the same trend -higher values during the moist, cooler part of the year (May-September) and lower values during the drier, warmer period (January-March).

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“…Clover growing point number had declined by autumn of the second year and the reduced growth potential was reflected by clover production of the Matua swards declining to a level similar to that of Nui in the third year. This decline may be associated with a combination of dry summers and overgrazing in the open Matua swards as these factors reduce clover stolon mass (Hay & Chapman 1984) and thus regrowth potential.…”

Section: Matua Plant and Seedling Numbersmentioning

confidence: 99%

Comparative performance of ‘Grasslands Matua’ prairie grass and ‘cGrasslands Nui’ ryegrass under a hard, infrequent grazing management

Stevens¹,

Hickey²

1989

New Zealand Journal of Agricultural Research

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'Grasslands Matua' prairie grass (Bromus willdenowii Kunth) and 'Grasslands Nui' ryegrass (Lolium perenne Lam.), both sown with 'Grasslands Huia' white clover (Trifolium repens), were compared under sheep grazing on two soil types near Riversdale, Southland. The soil types were a Kaweku silt loam and a Hororata silt loam. The trial was sown in October 1982 and continued until February 1986. Plots were grazed to 4 cm from November to February and to 1 cm during the rest of the year, with regrowth periods long enough to enable 1500-2000 kgDM/ha to accumulate. Production from high-endophyte Nui swards was significantly better than from Matua in autumn and winter but annual production was not significantly different. White clover growth was greater with Matua prairie grass than with N ui ryegrass in the second year, but not in the first or third years. "Unsown species", mainly Poa annua and Bromus mollis, made up a significantly greater amount of the annual yield in Matua swards than in Nui swards. Matua re-seeding did not alter tiller numbers, and production from Matua was similar in each year. Grass grub infestation at one site did not alter the ranking of the treatments.

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Seasonal variation in the vertical distribution of white clover stolons in grazed swards

Cited by 37 publications

References 10 publications

White clover growth and morphology in dairy pasture in the Waikato region of northern New Zealand

White clover growth and morphology in dairy pasture in the Waikato region of northern New Zealand

Effect of grazing management and season on nitrogen and phosphorus content of leaves and stolons of white clover in mixed swards

Comparative performance of ‘Grasslands Matua’ prairie grass and ‘cGrasslands Nui’ ryegrass under a hard, infrequent grazing management

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