Response of seedling gorse to fertilisers

Ivens, G. W.; Mlowe, F.

doi:10.30843/nzpp.1983.36.9590

Cited by 2 publications

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“…The response of different weeds to increasing nutrient levels varies widely (Vengris et al, 1955;Hoveland et al,, 1976), For example, Austin et al (1985) showed that, for six thistle species, Carthamus lanatus achieved maximum relative yield at low nutrient concentrations and Cirsium vulgare at high nutrient concentrations. Once the nutrient responses of individual weed and pasture species are known, then it may be possible to manipulate the botanical composition of pastures by varying fertilizer application (Charles, 1968) and even to discourage the growth and development of the weedy species (Thrasher et al, 1963;Ivens & Mlowe, 1983), Moreover, the competitive advantage of one species over another may be modified or even reversed by changes in nutrient status (Williams, 1962). Hence, under conditions of high fertility, as in old subterranean clover (Trifolium subterraneum) pastures, C. lanatus can be suppressed by pasture and other weed species alike (Michael, 1968).…”

Section: Introductionmentioning

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

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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 ...

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Section: Introductionmentioning

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

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“…Both grasses and legumes can be used to suppress weed seedling emergence and survival [92,93]. However, grass species such as Lolium perenne are more suppressive than legumes against weeds as they provide higher ground cover density than legumes [92], so can compete strongly with the seedlings of weeds [94,95].…”

Section: Agronomic Tactics For Pasture Weed Controlmentioning

confidence: 99%

Weed Management in New Zealand Pastures

Ghanizadeh

Harrington

2019

Agronomy

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In New Zealand, pastoral farming for dairy and meat production is the major land use. As with any agricultural production system, weeds are a threat to efficient pasture production in New Zealand. In this review, we outline the problems caused by weeds in New Zealand pastures, and the management strategies being used to control them. There are currently 245 plant species from 40 plant families that are considered to be troublesome weeds in New Zealand pastures. The application of herbicides is an important approach to manage weeds in New Zealand pastures; however, a key to the success of these pastures is the use of clovers in combination with the grasses, so the challenge is to find herbicides that selectively control weeds without damaging these legumes. The use of spot spraying and weed wiping are often required to ensure selective control of some weed species in these pastures. Non-chemical agronomic approaches such as grazing management and using competitive pasture species often play a more important role than herbicides for weed management in many New Zealand pastures. Thus, integrated weed management using a combination of herbicides and good pasture management strategies leads to the most cost-effective and efficient control of pasture weeds in New Zealand.

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Response of seedling gorse to fertilisers

Cited by 2 publications

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

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

Weed Management in New Zealand Pastures

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