Residual soil P values for permanent pastures on reclaimed scrubland from Galicia (NW Spain).

Mombiela, F. A.; Nelson, L. A.; Fernández, Antonio Turrent; González-Andújar, José L.

doi:10.1007/bf01050346

Cited by 4 publications

(3 citation statements)

References 9 publications

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“…The use of VAM inoculation could be an alternative technology to reduce the application of chemical P fertilizer in these soils, which have high P-retention properties, phosphorus being the most limiting nutrient for pasture de-• Present address: Departamento de Agricultura, Facultad de Veterinaria, E-27002 Lugo, Spain. velopment (Mombiela et al 1986). VAM fungi have been shown to improve P uptake by plants, especially in phosphate-deficient soils or in soils with high Pfixing capacities (Hayman, 1982).…”

Section: Introductionmentioning

confidence: 99%

Effects of native vesicular–arbuscular mycorrhizal fungi and phosphate fertilizer on red clover growth in acid soils

Sáinz

Arines

1988

J. Agric. Sci.

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S U M M A R YThe effect of P applications and native vesicular-arbuscular mycorrhiza (VAM) on the growth and P nutrition of red clover plants was studied in two acid hill soils with similar edaphic characteristics. Mycorrhizal and non-mycorrhizal plants were compared under sterilized soil conditions. Plant growth increased on P addition in both soils, but the effect of mycorrhiza in improving drymatter production and P uptake was significant only in one of the soils. Fourteen and twenty-five mg/ kg Olsen-P were needed in this soil to obtain the same yields by mycorrhizal and non-mycorrhizal plants, respectively. Results are explained in terms of a different effectiveness of the two fungal populations, and the possible effect of the soil sterilization process on percentage VAM infection is discussed.

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Section: Introductionmentioning

confidence: 99%

Effects of native vesicular–arbuscular mycorrhizal fungi and phosphate fertilizer on red clover growth in acid soils

Sáinz

Arines

1988

J. Agric. Sci.

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“…Estimating the soil PAL by determining the pH of a lOrnM CaCl2 extract cannot, therefore, be recommended as a routine procedure. The degree of correlation between the estimated and observed PAL values followed an inverse trend to that for the buffering capacity of the soils, the highest correlation being observed for soil 1, the least buffered soil (16), and the lowest for soil 4, which had the strongest buffering capacity, a feature related to its andic properties (16).…”

Section: Resultsmentioning

confidence: 77%

Comparison of indirect methods for the determination of percent exchangeable aluminium in acid soils of Galicia (NW Spain)

Mosquera

1990

Communications in Soil Science and Plant Analysis

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Ten easily determined soil parameters related to soil acidity were evaluated for their potential to provide simple, indirect estimates of the exchangeable aluminium percentage (PAL). These parameters were correlated with the PAL in 0.6N BaCl 2 extracts of soils collected from lime trials on 4 different parent materials. Six rates of lime (0, 0.75, 1.5, 3, 6, 12 t/ha) were added 3-4 years prior to collection of the samples. The soil parameters examined were the pH of soil suspensions with SMP, Woodruff and New Woodruff buffer solutions; the pH of 1, 5 and l0mM CaCl 2 and 0.6N BaCl 2 soil extracts, and the aluminium content of 1, 5 and lOmM CaCl 2 soil extracts. The best correlations with the exchangeable aluminium percentage for all soils considered, were those based on the aluminium content of the 5mM CaCl 2 extract (r=0.976, n=24) followed by the pH of the 0.6N BaCl 2 extract (r=0.945, n= 24). Both these methods are suggested as reliable indirect estimates of soil exchangeable alumimium percentage where availability of staff or equipment restrict direct determinations. 365Copyright© 1990 by Marcel Dekker, Inc.

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“…The results ranged from 97 to 108%. Bolland & Bowden (1984) and Mombiela (1986) reported residual effects of 30 -50% for superphosphate in the second year. The soils in these studies were of very low P status and apparently oxisols.…”

Section: Soil Analysismentioning

confidence: 99%

Partially acidulated phosphate rock as fertiliser and dissolution in soil of the residual rock phosphate

Rājan

1987

New Zealand Journal of Experimental Agriculture

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A field trial was conducted for two years to determine the effectiveness of partially acidulated phosphate rock (P APR) -in this instance, a reactive North Carolina rock acidulated with 20, 30, and 50070 of the phosphoric acid needed for complete acidulation. The soil was a yellowbrown loam (Typic Vitrandept), and triple superphosphate (TSP) was used as the standard fertiliser. The fertilisers were applied at four rates to a ryegrass -white clover permanent pasture. The soil was highly P retentive and the dominant clay was allophane. The trial design enabled measurement of the residual effectiveness of the fertilisers in the second year. The ability of soil tests (namely, Olsen, Bray-II min, Bray-I 30 min, and anion exchange resin) to indicate soil P availability to plants was assessed. The rate of dissolution of unacidulated rock phosphate in P APR was calculated from inorganic P fractionation in soil samples collected at intervals. Dry matter yields and P uptake indicated that, as a maintenance fertiliser, even P APR 20% was as effective as TSP from the first pasture cut. The residual effectiveness of fertilisers in the second year ranged from 97 to 108 % of the effectiveness of freshly added TSP. All soil tests significantly correlated with dry matter yield and P uptake. In the Bray-I test, extractable P decreased with increasing shaking time and the values stabilised after 15 min shaking. Bray-I 30 min was found to be desirable for convenience and accuracy. No measurable amount of unacidulated rock phosphate in P APRs dissolved in the first 3 months after fertiliser addition. The rate of dissolution in the next 15 months was 60% per year of that initially added.

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Residual soil P values for permanent pastures on reclaimed scrubland from Galicia (NW Spain).

Cited by 4 publications

References 9 publications

Effects of native vesicular–arbuscular mycorrhizal fungi and phosphate fertilizer on red clover growth in acid soils

Effects of native vesicular–arbuscular mycorrhizal fungi and phosphate fertilizer on red clover growth in acid soils

Comparison of indirect methods for the determination of percent exchangeable aluminium in acid soils of Galicia (NW Spain)

Partially acidulated phosphate rock as fertiliser and dissolution in soil of the residual rock phosphate

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