The effect of fertiliser on ragwort in pasture

Thompson, A.; Saunders, A.E.

doi:10.30843/nzpp.1986.39.9373

Cited by 4 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The latter treatment is comparable to a set stocked sheep grazing, while the longer treatment resembles a fast rotational grazing with dairy heifers. Similar effects of pasture height (or residuals) were obtained by Edwards et al (2000) for Californian thistle and by Wardle et al (1992) for nodding thistle, while Thompson & Saunders (1986) and Rahman et al (1990) made similar observations for ragwort in combination with fertilisers. Maintaining a strong sward in autumn when most seedlings emerge (Popay & Thompson 1980) proved a highly effective method to control nodding thistle populations.…”

Section: Resultssupporting

confidence: 70%

Optimising pasture production to minimise weed growth

Eerens¹,

Rahman²,

James³

2002

ProNZG

View full text Add to dashboard Cite

Weeds are part of any land based production system and need to be managed appropriately to minimise their negative impact on economic returns. Too frequently herbicides are used routinely to cure the weed problem without examining the underlying cause of the problem. Routine herbicide use poses risks to the environment and damages New Zealand's 'Clean and Green' image, therefore alternative weed management strategies need to be considered. In pasture based systems, ensuring that the forage species are in prime condition all year round is the method of choice to reduce weed problems to sub-economic levels. Forage grasses are very competitive, so much so that they often prevent significant contributions from companion species like white clover. In an experiment Californian thistle was grown in pasture maintained at two different height ranges. Maintaining a longer pasture significantly reduced Californian thistle shoot production, while not affecting total forage production. It is concluded that maintaining longer pasture residuals not only slightly increased pasture production, it also minimised weed problems and should therefore be the choice weed control strategy for pastoral farmers, wherever possible. Keywords: Californian thistle, grazing, pasture management, weed management

show abstract

Section: Resultssupporting

confidence: 70%

Optimising pasture production to minimise weed growth

Eerens¹,

Rahman²,

James³

2002

ProNZG

View full text Add to dashboard Cite

show abstract

“…The key mechanism for controlling S. madagascariensis appears to be the prevention of germination and seedling establishment by established perennial pastures. Such control has been achieved for Senecio jacobaea (Thompson & Saunders, 1986), as well as for S, madagascariensis (Martin & Colman, 1977), by stimulating the growth of pastures through fertilizer applications. The correct timing of such applications would appear to be critical in order to prevent S. madagascariensis from being capable of a response.…”

Section: Discussionmentioning

confidence: 99%

Growth and competitiveness of Senecio madagascariensis Poir. (fireweed) in relation to fertilizer use and increases in soil fertility

Sindel

Michael

1992

Weed Research

View full text Add to dashboard Cite

Summary: Résumé: Zusammenfassung The relative importance of increasing nutrient availability with regard to the growth and level of infestation of Senecio madagascariensis Poir. (fireweed) in pastures was assessed. In a ‘replacement series’ experiment with Avena strigosa Schreb. cv. Saia (oats), representing a vigorous annual competitor, total shoot dry weight of S. madagascariensis (when grown in pots alone or with oats) increased significantly (P<0.001) with increasing levels of nitrogen and phosphorus, but was unaffected by potassium levels. The relative growth of S. madagascariensis in mixtures of the two species, and hence the competitive advantage of the weed, generally increased at higher nitrogen and phosphorus levels. A greater percentage of dry matter was also partitioned into stems and flowering capitula, thereby raising its relative reproductive effort, and hence its invasive potential. Raising soil fertility through the use of nitrogen‐ or phosphorus‐based fertilizers, or pasture legumes, is unliely in itself to suppress the growth of S. madagascariensis. Rather, fertilizer use may preferentially benefit the weed. Croissance et compétitivité de Senecio madagas‐cariensis Pair, en relation avec la fertilisation et l'augmentation de la fertilité du sol L'importance relative de la disponibilité de nutriments croissants a été estimée sur la croissance et le taux d'infestation de Senecio madagascariensis dans les prairies. Dans une expérimentation de type ‘séries de remplacement’ avec Avena strigosa (Schreb) cv Saia (avoines), représentant un fort compétiteur annuel, le poids total de matière sèche de S. madagascariensis (cultivées en pots seuls ou avec avoines) a augmenté significativement (P< 0,001) avec une élévation des taux d'azote et de phosphore, mais n'a pas été affecté par le taux de potasse. La croissance relative de S. madagascariensis en mélange avec les deux espèces, et donc l'avantage dans la compétition de l'adventice, a en général augmenté avec des taux plus élevés en azote et phosphore. Un plus grand pourcentage de matière sèche était aussi réparti dans les tiges et les capitules foliaires, augmentant ainsi sa capacité reproductive et delà son potentiel d'envahissement. Augmenter la fertilité du sol à travers des engrais azotes et phosphores, ou des engrais verts est en soi‐même non envisageable pour entraver la croissance de S. madagascariensis. L'utilisation d'engrais peut plutôt être profitable à l'adventice. Wachstum und Konkurrenzkraft von Senecio madagascariensis Poir. in Bezug auf Döngung und Zunahme der Bodenfruchtbarkeit Die Bedeutung steigender NährstoffVerfüg‐barkeit für das Wachstum von Senecio madagascariensis und die Verunkrautung von Weideland mit dieser Pflanzenart wurde bestimmt. In einem Substitutionsversuch mit Sand‐Hafer (Avena strigosa Schreb., ‘Saia’) als konkurrenzstarke einjährige Art nahmen die oberirdische Trockenmasse und damit der Konkurrenzvorteil von Senecio madagascariensis mit steigender Stickstoff‐ und Phosphorversorgung signifikant zu (P<0,001); Kalium ...

show abstract

“…especially at the seedling stage of tansy ragwort (34). StiITIu]ating growth of inherently low fertility pastures by phosphate and nitrogen fertilizer nlay significantly reduce the population of tansy ragwort seedlings and slTIall rosettes (117).…”

Section: Pasture and Rangeland Weed Controlmentioning

confidence: 99%

Grazing Animals as Weed Control Agents

1996

View full text Add to dashboard Cite

Literature on the effectiveness of grazing animals (especially cattle, goats, and sheep) in controlling weeds is reviewed. Availability of animals and the ability to fence them onto or off weed infestations are essential. Weeds of pastures are the most suitable subjects for control, although weeds of arable crops, forestry, and waste places are sometimes amenable to control by grazing animals. Although grazing animals themselves often cause weed problems in pasture, adjusting grazing timing or intensity or both can sometimes redress the balance. Increasing sheep or cattle stocking rates prevents animals from grazing selectively and can help control some weeds. Adjusting grazing pressure can also improve the growth of desirable pasture species so that these are more competitive and able to resist invasion of annual or biennial weeds. Introducing a different class of stock, like sheep into a cattle system or goats into a sheep system can control many weeds. Goats are capable of browsing on and controlling spiny or poisonous brush weeds, including gorse and poison ivy, without suffering adverse effects. Examples are given of the use of grazing animals for weed control in crops and forestry.

show abstract

The effect of fertiliser on ragwort in pasture

Cited by 4 publications

References 0 publications

Optimising pasture production to minimise weed growth

Optimising pasture production to minimise weed growth

Growth and competitiveness of Senecio madagascariensis Poir. (fireweed) in relation to fertilizer use and increases in soil fertility

Grazing Animals as Weed Control Agents

Contact Info

Product

Resources

About