Marginal sulphur supplies for grassland herbage in south-east Scotland

McLaren, R. G.

doi:10.1017/s0021859600062481

Cited by 15 publications

(5 citation statements)

References 6 publications

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“…The hydrogen sulphide formed was measured by the methylene blue method.6 Total sulphur in the soils was estimated in the same way after ignition at 400°C with silver oxide and sodium bicarbonate to oxidise organic sulphur to sulphate.7 The sulphate retention capacity of the soils used in the pot experiment was measured as described by Scott. 8 Free iron and aluminium were extracted by the acid oxalate m e t h~d ,~ iron being determined with 2: 2l dipyridyl and aluminium by the Aluminon method.10 Carbon was determined by the Walkley-Black method.ll…”

Section: Soil Analysesmentioning

confidence: 99%

The sulphate status of soils from north scotland

Scott¹,

Munro²

1979

J Sci Food Agric

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In a survey of soils from 125 farms in northern Scotland, calcium phosphate extractable sulphate values ranged from 4 to 55 mg S kg soil-l. In 46% of the samples the values were below 14 mg S kg-1, a limit which in countries such as Australia and USA is regarded as representing marginal soils likely to respond to added sulphur. Low values occurred throughout the area examined. Five soils representative of the group and varying in extractable sulphate from 5 to 18 mg S kg soil-' were studied in a pot experiment to assess the sulphur supplying power. The first cuts of ryegrass contained < 0.2 % S in the dry matter and had N: S ratios upwards of 15 : 1, both indicative of inadequate sulphur. Addition of sulphur improved the nutrition of the plants and increased yields, but in some cases N: S values in excess of 15:l were still obtained. A similar result was found in the second cut, indicating that under these conditions the five soils were unable to provide an adequate supply of sulphur to the crop.

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Section: Soil Analysesmentioning

confidence: 99%

The sulphate status of soils from north scotland

Scott¹,

Munro²

1979

J Sci Food Agric

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“…The results of studies carried out in recent years in Britain have suggested that grassland herbage in some regions may be unable to obtain sufficient sulphur (S) to support optimum plant growth (McLaren, 1975;Williams, 1975 this is likely to occur include areas where soil reserves of S are low (both as sulphate and organic S), atmospheric inputs are small, only S-free fertilizers are used and high rates of nitrogen (N) are applied.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of fertilizers on the sulphur content of herbage

McLaren¹

1976

Grass and Forage Science

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The sulphur concentrations in herbage samples from the plots of a long-term fertilizer experiment have been examined in relation to levels of fertilizers applied. Sulphur applied as superphosphate increased herbage sulphiir concentrations whereas reduction in concentrations were observed with applications of nitrogen as 'Nitro-chalk' and potassium as potassium chloride. Reduction in sulphur concentration occurred most likely as a result of increased dry matter production brought about by the added nitrogen and potassium, effectively diluting the sulphur content of the plant material. Potassium chloride may also have exerted an anion-antagonistic effect on sulphate uptake by the plants. Levels of soil extractable sulphate were low in plots receiving no sulphur as fertilizer and high levels of nitrogen applied to these plots resulted in wide nitrogen: sulphur ratios in the herbage. Most of the sulphur applied to the soil in the spring was leached out of the topsoil by the end of the growing season.

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“…In the current study, these measurements were too variable in relation to apparent crop requirement to provide information about the S status of the crop, both for deficient (McLaren 1975) and excess (Rennenberg 1984) situations. Part of the problem could be that these measurements vary considerably with the plant's stage of growth, the tissue sampled (Kelling and Matocha 1990), or even the method of S measurement (Kowalenko 2000).…”

Section: Discussionmentioning

confidence: 89%

Availability of single spring applications of three sulphur fertilizer sources to grass under humid weather conditions

Kowalenko¹

2009

Can. J. Soil. Sci.

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Kowalenko, C. G. 2009. Availability of spring applications of three sulphur fertilizer sources to grass under humid weather conditions. Can. J. Soil Sci. 89: 511Á519. Field experiments were conducted to compare the effectiveness of single spring applications of three sulphur (S) fertilizers (powdered and granulated elemental S, and granulated sparingly soluble gypsum) to supply S to tall fescue grass (Festuca arundinacea 'Festorina') under humid weather conditions of coastal British Columbia. The treatments were three rates (30, 60 and 90 kg S ha (1) of each of the three fertilizers and control (No S) in three plots initiated in 1997, 1998 and 1999 in different locations in an uniformly managed field. The relative effectiveness of the fertilizers was detected by plant uptake of S since the site was only marginally S deficient resulting in only occasional yield increases. The fertilizers were also evaluated by the increase of inorganic sulphate in the soil. The plant and soil measurements showed that S was available to the plant earlier from the granular gypsum than the elemental forms, and the powdered form was available slightly earlier than the granular form of elemental S. Some uptake of all three fertilizers occurred early in the season, i.e., by the first cut of the crop, showing that elemental S was oxidized relatively quickly. The delayed uptake of S from the granulated elemental S compared with the powdered form reflected the need for the granule to disintegrate before it could be oxidized in the soil. This study showed that S is not always available in soils at the time it is required by plants within a growing season of multiple-cut grass. Knowing the pattern of the release of S from various fertilizer forms in relation to within-season variations of soil S availability and plant requirement of S can provide the basis for optimum amendment decisions. Kowalenko, C. G. 2009. Disponibilite´deDisponibilite´de trois engrais soufre´ssoufre´s applique´sapplique´s une seule fois au printemps pour les gramineés cultiveés en climat humide. Can. J. Soil Sci. 89: 511Á519. L'auteur a proce´deá`desproce´deá`proce´deá`des essais sur le terrain pour comparer l'efficacite´defficacite´d'une simple applicationprintaniè re de trois engrais soufre´ssoufre´s (S) (S eíe´eíe´mentaire en poudre ou granuleét gypse granule´partiellementgranule´partiellement soluble) devant fournir le S ne´cessairene´cessaire a` la fe´tuquefe´tuque eíeveé (Festuca arundinacea cv. Festorina) sous le climat humide de la coˆtecoˆte de la Colombie-Britannique. Les engrais ont e´teápplique´se´teápplique´e´teápplique´s a` trois taux diffe´rentsdiffe´rents (30, 60 et 90 kg de S par hectare) sur trois parcelles ame´nageésame´nageés en 1997, 1998 et 1999, a` divers endroits d'un champ exploite´deexploite´demaniè re uniforme; l'expe´rienceexpe´rience incluait un traitement te´mointe´moin (aucune application de S). L'efficacite´relativeefficacite´relative des engrais a e´teé´tabliee´teé´e´teé´tablie daprè s l'absorption du S par la plante, le site n'e´tante...

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Marginal sulphur supplies for grassland herbage in south-east Scotland

Cited by 15 publications

References 6 publications

The sulphate status of soils from north scotland

The sulphate status of soils from north scotland

Effects of fertilizers on the sulphur content of herbage

Availability of single spring applications of three sulphur fertilizer sources to grass under humid weather conditions

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