Performance of new pasture cultivars in a hill country finishing system

Webby, R. W.; Sheath, G. W.; Boom, C. J.

doi:10.33584/jnzg.1990.51.1891

Cited by 24 publications

(20 citation statements)

References 8 publications

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“…Including the costs associated with collection and storage of seed, suppression of resident pasture with herbicide, oversowing and treading, we estimate that the total establishment cost for this approach would be ∼$NZ2000 per hectare, if applied at a broader scale. While this is much greater than the typical cost of pasture renewal using the same techniques in hill country ($NZ250–500 per hectare, Webby et al . 1990), it compares favourably with the cost of establishment by transplanting, estimated at $NZ12 500 for planting native shrub hardwoods at 2500 stems per hectare (Bergin & Gea 2005).…”

Section: Discussionmentioning

confidence: 90%

Direct seeding of indigenous tree and shrub species into New Zealand hill country pasture

Dodd¹,

Power²

2007

Eco Management Restoration

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agresearch.co.nz). This project was part of an indigenous biodiversity restoration research project conducted in the context of a wider integrated catchment management program at the Whatawhata Research Centre, located near Hamilton, New Zealand. SummaryOur study aimed to examine the applicability of a native plant restoration technique involving close grazing, blanket herbicide spraying and mob stocking (to trample the seed into the soil) for establishing New Zealand native tree and shrub species into exotic hill country pasture. This approach represents an alternative to the usual spaced-planting of seedlings in the context of an indigenous vegetation restoration programme. Field-collected seed of Cabbage Tree ( Cordyline australis ), Kahikatea ( Dacrycarpus dacrydioides ), Kanuka ( Kunzea ericoides ), Karamu ( Coprosma robusta ), Kohuhu ( Pittosporum tenuifolium ), Koromiko ( Hebe stricta ), and Manuka ( Leptospermum scoparium ) were germination tested in the laboratory, and broadcast sown in two field experiments in spring 2001 and autumn 2002. The spring-sown experiment tested the effect of mob stocking and the autumn-sown experiment tested the effect of mob stocking and sowing rate. Laboratory germination varied widely among species (0 -88%). In the field, the two shrubs, Koromiko and Karamu, established densities of up to 5 and 1.2 plants/m 2 , respectively, after 2.5 years. Autumn emergence for these two species strongly related to sowing rate. Three tree species, Cabbage Tree, Kahikatea and Manuka, emerged in the field but did not survive beyond 6 months. Mob stocking was effective in spring but not autumn sowing, implicating soil moisture content as an important factor in germination success. The study demonstrated that the direct seeding technique was successful for two shrub species, highlighting the potential for development of a cost-effective native plant restoration approach.

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Section: Discussionmentioning

confidence: 90%

Direct seeding of indigenous tree and shrub species into New Zealand hill country pasture

Dodd¹,

Power²

2007

Eco Management Restoration

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“…While there is general support in the literature for the benefits of white clover to hill country mixed livestock systems, only a few whole-systems analyses have been published, mostly addressing the introduction of multiple pasture species (e.g. Webby et al 1990, who noted the critical need to effectively utilise additional pasture grown). Most recently, Rendel et al (2017) used the AgInform ® farm systems optimisation model to assess the added value of legumes in the context of a Whanganui hill farm system.…”

Section: Farm Systems Modellingmentioning

confidence: 99%

Quantifying the value proposition for white clover persistence on a New Zealand summer-dry hill-country farm

Dodd¹,

Tozer²,

Vogeler³

et al. 2020

Journal of NZ Grasslands

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The improvement in forage quality and quantity of summer-dry hill country pasture resulting from the introduction of clover is well recognised. However, ensuring the persistence of the commonly availablecultivars is challenging, in the face of seasonal moisture stress, intensive grazing, competition from established well-adapted pasture species, low soil fertility and low soil pH – conditions typical of the East Coast of the North Island. Here we quantify the value proposition associated with the introduction of white clover into a case study on a Gisborne sheep and beef farm, using a six-step process. A topographically explicit approach is taken, using an understanding of the underlying spatial variability, based on a combination of soil and pasture measurements, APSIM simulation modelling of pasture growth and farm system modelling of enterprise performance. We show that from a baseline of a typical low-fertility, diverse species hill country pasture, white clover introduction can increase spring and summer forage consumption by 17%, enabling inclusion of an additional 6-month bull finishing enterprise generating a 32% greater carcass weight production and leading to a 49% improvement in farm system EBIT. This represents a positive net present value of over $360,000 for the original investment in white clover establishment into existing pastures.

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“…By the late 1980s, 17-34% of farmers had sown prairie grass on their farms (Belgraveetal.1990;Bell 1991). Generally, farmer (Sellars 1988;Bell 1991) and researcher (Thorn et al 1990;Webby et al 1990) perceptions were that the persistence of prairie grass in grazed pastures was poor. Damage caused by M. destructor was identified as a factor in the decline of prairie grass in pasture (Prestidge et al 1987;Prestidge & Van der Zijpp 1988;Thorn et al 1989Thorn et al , 1992.…”

Section: Introducfionmentioning

confidence: 99%

Population biology and parasitism of Hessian fly (Mayetiola destructor) (Diptera: Cecidomyiidae) onBromus willdenowiiin New Zealand

Prestidge

1992

New Zealand Journal of Agricultural Research

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Populations of the Hessian fly (Mayetiola destructor (Say» were studied during 1987-89 in prairie grass (Bromus willdenowii (Kunth) fields near Hamilton in the North Island of New Zealand. Populations had three generations per year and overwintered as pupae from June to September. Pupae were present all year and egglaying commenced in early spring (September). Peak egg, larval, and pupal densities were 302-1236, 1164-3197, and 437-992/m 2 , respectively. At three sites in 1987/88 and two sites in 1988/89, the number of prairie grass tillers killed were 88, 78, and 86%, and 23 and 34%, respectively. An average (± SE) of 802 ± 56 centigrade degree-days (DD) accumulated between generations. Levels of pupal parasitism were between 26 and 42% and 3 and 34% in 1988 and 1989, respectively. Platygaster hiemalis (Forbes) (Scelionoidea: Platygasteridae) was the most abundant parasitoid (92% of parasitised pupae) and, on average, 3.2 P. hiemalis adults emerged per parasitised pupa. This research has demonstrated that prairie grass is an important host of Hessian fly and has indicated that control techniques need to be developed if the persistence of prairie grass as a forage crop is to be improved.

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Performance of new pasture cultivars in a hill country finishing system

Cited by 24 publications

References 8 publications

Direct seeding of indigenous tree and shrub species into New Zealand hill country pasture

Direct seeding of indigenous tree and shrub species into New Zealand hill country pasture

Quantifying the value proposition for white clover persistence on a New Zealand summer-dry hill-country farm

Population biology and parasitism of Hessian fly (Mayetiola destructor) (Diptera: Cecidomyiidae) onBromus willdenowiiin New Zealand

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