Soil potassium supply and <i>Rumex obtusifolius</i> and Rumex crispus abundance in silage and grazed grassland swards

Humphreys, J.; Jansen, T.; Culleton, N.; MacNaeidhe, F. S.; Storey, T.

doi:10.1046/j.1365-3180.1999.00123.x

Cited by 26 publications

(37 citation statements)

References 17 publications

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“…In the past, connection of words Rumex spp. and silage was only in articles describing the effect of broadleaved dock (Rumex obtusifolius L.) on grass silage quality (Hejduk andDoležal, 2004 and2008); abundance of broadleaved dock (Rumex obtusifolius L.) in silage (Humphreys et al, 1999); as a part of silage for reindeer (Wallsten, 2003), or the survival of broadleaved dock (Rumex obtusifolius L.) in an unmanaged grassland (Martinkova et al, 2009) was researched. These researches were aimed on Rumex obtusifolius L., which is considered as one of the most troublesome weeds in intensively managed permanent grassland (Holm et al, 1977 of dry matter respectively (Petrikovič et al, 2000).…”

Section: Resultsmentioning

confidence: 99%

Energy content of hybrid Rumex patienta L. x Rumex tianschanicus A. Los. (Rumex OK 2) samples from autumn months

Rolinec

Rakhmetov²,

Bíro

et al. 2018

Acta fytotechn zootechn

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Aim of this experiment was to determine the gross energy concentration of fresh, wilted and ensiled hybrid of Rumex patientia L. × Rumex tianschanicus A.Los. (Rumex OK 2). Samples were collected in autumn months of the year 2017. The plant of Rumex OK 2 consist during autumn months only from rosette of leaves. The height of leaves was in autumn months following, September 56.68 ±13.80 cm; October 59.29 ±11.93 cm and November 55.98 ±10.80 cm. Rumex OK 2 silage was made from wilted matter, with or without of addition of dried molasses. Gross energy was determined as the heat released after combustion of a sample (Leco AC 500) in MJ per kilogram of dry matter of the sample. By the autumn months the concentration of dry matter, as well as the concentration of gross energy increased, except Rumex OK 2 silage from November. The highest concentration of gross energy had wilted Rumex OK 2 from November (18.02 MJ kg -1 of dry matter). There was no significant effect of addition of dried molasses to wilted Rumex OK 2 before ensiling on gross energy concentration in Rumex OK 2 silages (P >0.05). Gross energy concentration of all types of analysed samples had relative high value (16.98 to 18.02 MJ kg -1 of dry matter). Fresh or ensiled Rumex OK 2 can be used as a part of feed ratio for ruminants or can be utilised in biogas station. However, due to the low content of dry mater in fresh or wilted material the production of silage can be in autumn months problematic.

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Section: Resultsmentioning

confidence: 99%

Energy content of hybrid Rumex patienta L. x Rumex tianschanicus A. Los. (Rumex OK 2) samples from autumn months

Rolinec

Rakhmetov²,

Bíro

et al. 2018

Acta fytotechn zootechn

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“…In a survey on the incidence of R. obtusifolius in the United Kingdom (Haggar 1980), applying slurry, farmyard manure and nitrogen were closely connected to the occurrence of the species. Humphreys et al (1999), who analysed the soil in 42 grassland fields in Ireland, reported that soil potassium concentration was positively correlated with Rumex spp. (R. obtusifolius and R. crispus) abundance in grazed and silage swards.…”

Section: Introductionmentioning

confidence: 99%

Effects of management intensity and soil chemical properties on Rumex obtusifolius in cut grasslands in Lower Austria

2011

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Rumex obtusifolius (broad-leaved dock) is a widely distributed weed in managed grasslands and is an indicator for excessive grassland management. Especially in organic farming, its control is highly labour and energy intensive. The effects of management extensification on R. obtusifolius were investigated by on-farm trials with reduced cutting frequencies and manuring amounts from 2004 to 2006 at three sites in Lower Austria. The sites distinctly differed in their nutrient availabilities (LiClextract; Ca: ranged from 1,380 to 2,062 mg/kg DM, Mg: 211-611 mg/kg, P: 4-40 mg/kg, K: 57-334 mg/kg). At one site reduced management intensity had a significant decreasing effect on R. obtusifolius infestation, whereas at the other sites no effect was observed. Consequently, extensification as a measure for controlling this weed can be effective under certain conditions. Soil analyses indicated that Ca and Mg concentrations were negatively correlated to R. obtusifolius density, and the site where infestation declined under reduced management was characterised by abundant Ca and Mg in the topsoil. K showed a weak positive correlation with plant density development and P was not related to R. obtusifolius. According to the literature, an abundance of Ca and Mg in the soil could reduce the competitiveness of the species. Consequently, high concentrations of these nutrients might enhance the probability for an effective R. obtusifolius control by management extensification. Further research is required to clarify the influence of Ca and Mg on the competitiveness of R. obtusifolius, and may lead to recommendations for the management of this weed.

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“…These species represent aggressive plants which force cultural grasses and legumes out from their surroundings and cause problems at herbage conservation due to their low DM contents. Humpreys et al (1999) demonstrated that grazed swards in Britain were related to a higher mortality of docks as compared with mown swards due to lower doses of applied fertilisers, increased defoliation and trampling. High doses of N-fertilisers were put into connection with higher occurrence of Rumex obtusifolius.…”

mentioning

confidence: 99%

Nutritive value of broad-leaved dock (Rumex obtusifolius L.) and its effect on the quality of grass silages

Hejduk¹,

Doležal²

2004

CZECH J ANIM SCI

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Broad-leaved dock is together with creeping thistle (Cirsium arvense (L.) Scop.) and dandelion (Taraxacum officinale Wigg.) one of the most frequently occurring grassland weeds in the Czech Republic (Martinková and Honěk, 2001). Broadleaved dock belongs to the group of plants with the highest requirement for nitrogen and other nutrients. Its ecological requirements and herbage quality differ only li�le from those of curled dock (Rumex crispus L.) and the two species can therefore be assessed together (Weissbach, 1998). According to Klimeš (1993), there are also unfertile hybrids of the two species occurring in grass stands, referred to as R. ×pratensis. These species represent aggressive plants which force cultural grasses and legumes out from their surroundings and cause problems at herbage conservation due to their low DM contents. Humpreys et al. (1999) demonstrated that grazed swards in Britain were related to a higher mortality of docks as compared with mown swards due to lower doses of applied fertilisers, increased defoliation and trampling. High doses of N-fertilisers were put into connection with higher occurrence of Rumex obtusifolius. Novák (1994) described associations with dominating broad-leaved dock at grazing sites overfertilized with animal excrements, which can be long without any change in the species composition and which are avoided by grazing animals. In the system of organic agriculture the broad-leaved dock is a very serious problem as it cannot be controlled by herbicides and docks markedly reduce the sward nutritive value (Pötsch, 2000).With respect to the fact that sward herbages are fed on most farms in the form of grass silages, it is vitally important to know individual factors affecting their nutritive value and also the quality of fermentation process during their production. The effect of broad-leaved dock (Rumex obtusifolius L.) on the impaired nutritive value of grassland herbages was studied together with the effect of dock and addition of microbial inoculant on the fermentation process in grass silages. The herbage of broad-leaved dock exhibits low DM content, CP and fibre contents comparable with red clover, yet its NEL concentration is low. Quality of silages made of dock at DM content over 300 g/kg is good but the silages show significantly lower contents of lactic acid (35.9%), acetic acid (70.0%) and higher pH values (4.69 vs. 4.35) as compared with the grass silage. Silages made of dock do not contain butyric acid and exhibit lower rates of proteolysis. The presence of broad-leaved dock in herbage poses a danger of slow wilting and low production of fermentation acids. The addition of lactic acid bacteria (LAB) showed in the studied set of silages and in dock silages by an increased content of lactic acid (+18.9% and +27.0%, resp.) and by a significant reduction of pH value (-0.17 and -0.14, resp.).

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Soil potassium supply and Rumex obtusifolius and Rumex crispus abundance in silage and grazed grassland swards

Cited by 26 publications

References 17 publications

Energy content of hybrid Rumex patienta L. x Rumex tianschanicus A. Los. (Rumex OK 2) samples from autumn months

Energy content of hybrid Rumex patienta L. x Rumex tianschanicus A. Los. (Rumex OK 2) samples from autumn months

Effects of management intensity and soil chemical properties on Rumex obtusifolius in cut grasslands in Lower Austria

Nutritive value of broad-leaved dock (Rumex obtusifolius L.) and its effect on the quality of grass silages

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