Seasonal variation in establishment of oversown seed in relation to tussock proximity

Scott, D.; Archie, W. J.

doi:10.1080/03015521.1976.10425890

Cited by 7 publications

(7 citation statements)

References 3 publications

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“…Thus the regeneration shadow is asymmetrical for density, but symmetrical with regard to seedling distance. A similar density pattern of seedlings of some exotic conifer species (Allen & Lee 1989) and introduced legumes (Scott & Archie 1976;Scott & Wallace 1978) has been demonstrated around tall tussocks, particularly on drier sites where the shady side of tall tussocks may provide better environmental conditions for seedling survival and growth than occurs on other aspects near the tussock.…”

Section: Discussionmentioning

confidence: 78%

Pattern of natural regeneration of narrow-leaved snow tussockChionochloa rigidassp.rigidain Central Otago, New Zealand

Lee

Fenner

Duncan

1993

New Zealand Journal of Botany

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Regeneration of Chionochloa rigida ssp. rigida (Poaceae) was investigated in two adjacent un burnt sites subjected to different levels of grazing by merino sheep over an 8 year period. The spatial pattern of establishment of immature plants within a 3 m radius of 100 isolated mature tussocks (basal diameter >20 cm) was recorded. Basal diameter, height, canopy width, slope, and aspect of the putative parents were noted, was was the size and position of the immature plants (basal diameter <10 cm). At the lower grazing intensity the number of immature plants increased with tussock size. Regeneration was successful in the absence of fire and at low grazing intensity, probably <0.2 stock units ha-1 yrl. However, recruitment was low under moderate grazing and uphill and upwind of mature tussocks. These factors need to be considered in the rehabilitation of narrow-leaved snow tussock grasslands in Central Otago.

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Section: Discussionmentioning

confidence: 78%

Pattern of natural regeneration of narrow-leaved snow tussockChionochloa rigidassp.rigidain Central Otago, New Zealand

Lee

Fenner

Duncan

1993

New Zealand Journal of Botany

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“…It was only in the semi-arid zone that short tussocks have a beneficial effect (Scott & Wallace 1978). Here there was greater establishment of oversown legumes in close proximity to tussocks and this was more related to greater summer survival of seedlings on the shaded south side of tussocks, than to differences in spring germination (Scott & Archie 1976;Scott & Wallace 1978).…”

Section: Sheltermentioning

confidence: 94%

“…These effects of tussocks are probably caused by modification of microclimate (Scott 1962;O'Connor & Lambrechtsen 1964;Scott & Archie 1976).…”

Section: Growth Ratesmentioning

confidence: 99%

“…While most of the native tussocks do not feature as major diet components of sheep grazing, as the physiognomic dominants of the vegetation they do influence the associated species, whether it be the zonation of smaller native species (Scott 1961a), oversown legumes (Scott & Archie 1976), or transplanted pasture grasses (Radcliffe 1974). These effects of tussocks are probably caused by modification of microclimate (Scott 1962;O'Connor & Lambrechtsen 1964;Scott & Archie 1976).…”

Section: Growth Ratesmentioning

confidence: 99%

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Native and low‐input grasses‐a New Zealand high country perspective

Scott

Keoghan

Allan

1996

New Zealand Journal of Agricultural Research

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Native, naturalised, pasture, and new grass introductions are discussed in terms of concepts of moisture, temperature, fertility, and utilisation gradients; characteristics of the New Zealand high country environment; and their utility for introduction into low-input pastoral systems. The perennial, long-lived habit of native grass is mimicked in introduced grasses. Poa colensoi is the best native grass, but there is a need for wider evaluation of serai non-tussock species. There is a greater frequency of spreading habit and annuals in naturalised low-input species. The "try it and see" and genotype/environment analysis are advocated for screening new introductions.

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“…Tussocks may also ameliorate extreme temperatures in their vicinity and reduce soil evaporation, so altering the micro-climate for plants (O'Connor & Lambrechtsen 1964;Radcliffe 1974;Radcliffe & Lefever 1981;Scott 1962;Sewell 1952;Zotov 1938) and influencing the zonation of plant species (Scott 1%1). Shelter from tussocks may also promote growth of introduced cocksfoot (Dactylis glomerata, Radcliffe 1974), and survival of oversown grasses and clovers (Scott & Archie 1976).…”

Section: New Zealand Studiesmentioning

confidence: 99%