Evaluation of phosphate fertilizers: I. Immediate value of dicalcium phosphate, nitrophosphates, Gafsa rock phosphate basic slag and potassium metaphosphate for barley and ryegrass

Mattingly, G. E. G.; Penny, A.

doi:10.1017/s0021859600010972

Cited by 13 publications

(11 citation statements)

References 10 publications

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“…The results obtained in the present study for a comparison of the effect of DCP and superphosphate on dry-matter yield of ryegrass in the glasshouse and of ryegrass-clover pasture in the field are in general agreement with those obtained overseas under cropping systems (Cooke 1956;Mattingly & Penny 1968). When compared on a unit P basis, DCP was found to be 90 -100% as effective as superphosphate in terms of herbage production in the present study, both in the glasshouse and in the field.…”

Section: Discussionsupporting

confidence: 88%

A comparison of dicalcium phosphate and single superphosphate as phosphate sources for pasture

Mackay

Gregg

Syers

1980

New Zealand Journal of Experimental Agriculture

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The effect of commercially available dicalcium phosphate (DCP) and single superphosphate on pasture production was evaluated in glasshouse and field trials. When compared on a unit-P basis, DCP (5.6% P) was slightly inferior (up to 10%) to superphosphate (8.6% P) in a glasshouse trial with ryegrass as the indicator plant; on a unit weight basis, DCP was only 60-70% as effective as superphosphate. No differences were obtained in the P concentration of the herbage obtained using the two materials. In a field trial on a P-responsive site, DCP and superphosphate gave similar increases in pasture production. Marked treatment differences were obtained for the P concentrations in ryegrass and clover in the field trial, particularly in the first harvest and with ryegrass. No difference was obtained in the short-term residual effect of the two materials. The data obtained are interpreted in terms of the chemical and mineralogical composition, and water solubility of DCP.

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Section: Discussionsupporting

confidence: 88%

A comparison of dicalcium phosphate and single superphosphate as phosphate sources for pasture

Mackay

Gregg

Syers

1980

New Zealand Journal of Experimental Agriculture

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“…Basic slag can also be used on conventional farms as a substitute for superphosphate. The above results are broadly in agreement with those of Gerritson (1967), Hodges et al (1968), Mattingly (1968), Mattingly & Penny (1968) and Fassbender & Muller (1969). These investigations showed that basic slag was as effective a source of P on a range of crops as was superphosphate.…”

Section: Discussionsupporting

confidence: 92%

Effect of Application of Basic Slag and Superphosphate on Herbage Yield and on Soil and Herbage Concentrations of Phosphorus in Organic Grassland

MacNaeidhe

2001

Biological Agriculture & Horticulture

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The experiment was carried out at an organic farm in 1996 and 1997. The purpose of the experiment was to test the effectiveness of basic slag (7% P) as a P fertilizer on an organic perennial ryegrass/white clover sward. Superphosphate (16% P) was used as a standard comparison. There was no difference between fresh weight or dry matter yields of grass or clover or of total herbage yields in plots treated with different rates of basic slag or superphosphate in the first harvest at the end of July 1996. In the second harvest, recorded at the end of August 1996, increasing rates of P gave increased yields. P source had no effect on herbage fresh weight or dry matter yield. P source and rate of P application had no effect on herbage yield in 1997. The percentage dry matter in herbage was unaffected by P source. Increasing rates of basic slag and superphosphate had no effect on the percentage dry matter in the herbage. There was no difference in the soil P concentrations obtained with basic slag or superphosphate when these were applied at equivalent rates. Increasing rates of P, when applied as basic slag or superphosphate at rates of 7, 14 and 28 kg ha-1 , gave an increase in soil P concentration at 128 days after application. No increase was recorded at 531 days after application. Superphosphate gave the largest initial increase in herbage concentrations of P but was no more effective at raising the soil and herbage concentrations of this element than equivalent rates of basic slag over a two year period.

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“…For the P effect, this result is consistent with overseas (Cooke 1956;Mattingly & Penny 1968) and New Zealand (Mackay et al 1980) evidence. Although Mackay et al (1980) reported an initial higher P concentration in ryegrass from superphosphate compared with dicalcic soon after application, this difference diminished with time.…”

Section: Single Versus Dicalcic Superphosphatesupporting

confidence: 84%

“…It has been used as a P fertiliser mainly on the east coast of the North Island but currently accounts for less than 10% of the applied P fertiliser. Previous research has shown that dicalcic is inferior to superphosphate when applied at the same rate (Cooke 1956;Mattingly & Penny 1968;Mackay et al 1980) but has similar effectiveness to superphosphate (Mackay et al 1980) on a per kg P basis.…”

Section: Introductionmentioning

confidence: 97%

Effect of lime and form of superphosphate on productivity of dryland pastures

Morton

Wheeler²,

Smith³

1998

New Zealand Journal of Agricultural Research

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The effect of initial high lime (7500 kg ha-1), annual low lime (200 kg ha-1 yr -1 ), and no lime (all with 200 kg ha -1 yr -1 superphosphate) and dicalcic superphosphate (400 kg ha -1 yr -1 ) was compared over six years under sheep grazing and mowing on a low rainfall (800 mm), low pH (5.4), phosphorus (P) responsive (Olsen P 5) Matapiro yellow-grey earth (Duric palic) soil near Hastings, Hawke's Bay, New Zealand. High lime significantly increased pasture dry matter yield compared with other treatments in the first three years of the trial under both grazing and mowing. There were no differences in annual yield between the other treatments. The response to high lime in relation to no lime in the first 3 years was greater under grazing (21%) than mowing (12%). There was a greater A97032 number of legume plants per m 2 under mowing than grazing. The increase in pasture yield from high lime in the grazing trial was because of an increase in grass rather than legume yield. Legume yield averaged over all years was similar for the other treatments. There was no significant difference in the P concentration of grasses between treatments. Compared with low lime, high lime resulted in an initial increase of 0.9 pH units. Low lime and dicalcic superphosphate maintained the initial soil pH. The initial low Olsen P levels were only slightly increased by the low rates of P fertiliser used.After six years, P applications ceased on the dicalcic and low lime treatments, and the high lime plots were split into no P and P (20 kg ha -1 yr -1 ) applied. During the residual effect phase (Year 7-17), there was no difference in annual yield between no lime and high lime when P applications continued. For all treatments, where P was withheld, annual yield was lower than where P was maintained.Application of high initial rates of lime in this environment resulted in a short-lived (3 year) response in pasture yield despite a large increase in soil pH. At equivalent rates of P there was no difference in the effectiveness of single and dicalcic superphosphate. The liming effect of dicalcic was matched by applying the equivalent low rate of lime as a dry mix in addition to superphosphate.

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Evaluation of phosphate fertilizers: I. Immediate value of dicalcium phosphate, nitrophosphates, Gafsa rock phosphate basic slag and potassium metaphosphate for barley and ryegrass

Cited by 13 publications

References 10 publications

A comparison of dicalcium phosphate and single superphosphate as phosphate sources for pasture

A comparison of dicalcium phosphate and single superphosphate as phosphate sources for pasture

Effect of Application of Basic Slag and Superphosphate on Herbage Yield and on Soil and Herbage Concentrations of Phosphorus in Organic Grassland

Effect of lime and form of superphosphate on productivity of dryland pastures

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