Soil development of an artificial soil mix: nutrient dynamics, plant growth, and initial physical changes

Cox, Justine; Whelan, Robert J.

doi:10.1071/sr99048

Cited by 10 publications

(5 citation statements)

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“…Increased mineral‐N concentrations have been measured in soils after the application of biosolids (Bertoncini et al. , 2008) because sewage materials contain considerable amounts of plant‐available nutrients (Cox & Whelan, 2000; Maguire et al. , 2000).…”

Section: Resultsmentioning

confidence: 99%

“…Increased mineral-N concentrations have been measured in soils after the application of biosolids (Bertoncini et al, 2008) because sewage materials contain considerable amounts of plant-available nutrients (Cox & Whelan, 2000;Maguire et al, 2000). Initial mineral-N varied from 0.0 to 1.32 mg ⁄ kg in the sandy Spodosol soon after the application of biosolids, but showed no significant increments in the Oxisol (Table 3).…”

Section: Soilsmentioning

confidence: 99%

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Effects of sewage sludge stabilization on organic‐N mineralization in two soils

Corrêa

White

Weatherley

2012

Soil Use and Management

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Sewage sludge is a valuable source of organic matter, N, P and certain micronutrients that have beneficial effects on plant growth and biomass production. However, sanitary regulations often require the stabilization of sewage materials prior to applying them to soils as biosolids. Environmental regulations also demand appropriate management of biosolid‐N to avoid groundwater contamination. Because stabilization processes usually make sewage sludge less putrescible, we hypothesized that the mineralization rates of organic‐N from stabilized biosolids would be affected. Therefore, this study aimed to evaluate the mineralization of five biosolids in two soils – a sandy Spodosol and a clayey Oxisol. Digested sludge, composted sludge, limed sludge, heat‐dried sludge and solar‐irradiated sludge were mixed with soil samples at a concentration of 32.6 mg N/kg soil (1.0 dry t/ha of digested sludge) and incubated at 25 °C in a humidity chamber for 23 weeks. Results showed that the stabilization processes generally slowed the release of mineral‐N in soils relative to the digested sludge from which the biosolids originated. However, increments in the levels of mineral‐N were more influenced by soil type than by the type of stabilization process applied to the sewage sludge. Mineralization rates were up to 5‐fold higher in the Oxisol than in the Spodosol soil, and as a result, organic‐N in biosolids mineralized 10–24% in Spodosol and 23–52% in Oxisol. Any appropriate plan for the management of biosolid‐N for plant use should consider the interaction between soil type and biosolid type.

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Section: Resultsmentioning

confidence: 99%

Section: Soilsmentioning

confidence: 99%

Effects of sewage sludge stabilization on organic‐N mineralization in two soils

Corrêa

White

Weatherley

2012

Soil Use and Management

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“…Older soils usually have more positive δ 15 N signatures due to longer microbial processing (Kramer et al 2003) and greater cumulative losses of 15 N depleted N such as nitrate and nitrous oxide over an extended period of time (Brenner et al 2001;Nadelhoffer and Fry 1994). Further, more developed soils usually have more acidic pH values as soil pH decreases with age (Cox and Whelan 2000;de Kovel et al 2000;Munroe and Altitude (m a.s.l.) Table 3 for species list).…”

Section: Discussionmentioning

confidence: 96%

Shift in soil–plant nitrogen dynamics of an alpine–nival ecotone

et al. 2007

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We investigated the nitrogen (N) dynamics of an alpine-nival ecotone on Mt. Schrankogel, Tyrol, Austria, in relation to temperature. Natural abundance of 15 N was used as a tool to elucidate differences in N cycling along an altitudinal transect ranging from 2,906 to 3,079 m, corresponding to a gradient in mean annual temperature of 2.4°C. The amount of total soil N, of plant available N and soil C/N ratio decreased significantly with increasing altitude, whereas soil pH increased. Soil δ 15 N decreased with increasing altitude from +2.2 to −2.1‰ and δ 15 N of plant tissues (roots and leaves) decreased from −3.7 to −5.5‰. The large shift in soil δ 15 N of 4.3‰ from the lowest to the highest site suggested substantial differences in N cycling in alpine and nival ecosystems in the alpine nival ecotone investigated. We concluded that N cycling at the alpine-nival ecotone is likely to be controlled by various factors: temperature, soil age and development, atmospheric N deposition and plant competition. Our results furthermore demonstrate that the alpine-nival ecotone may serve as a sensitive indicator of global change.

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“…In addition to agricultural application, the positive effects on plant growth have helped in restoration of degraded sites. Previous studies have demonstrated that sewage sludge enhances plant re-colonisation of former mine sites (Rate et al 2004), post-fire sites (Larchevêque et al 2008) and industrial sites (Cox and Whelan 2000). Moreover, sewage sludge application in forestry sites led to a significant increase in the production of trees such as Pinus radiata Wang et al 2004), P. halepensis (Fuentes et al 2007), Quercus ilex, P. pinea (Larchevêque et al 2006) and P. sylvestris (Bramryd 2002;Selivanovskaya and Latypova 2006).…”

Section: Introductionmentioning

confidence: 99%

Sewage sludge application for spontaneous plant restoration of a New Caledonian Ferralsol

et al. 2014

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Abstract. Soils from New Caledonia typically present poor nutrient content and large quantities of heavy metals such as nickel, chromium and cobalt, resulting in slow plant development. We evaluated the impact of sewage sludge application (0-30 t dry weight (DW) ha -1 ) on the passive revegetation of a former pine plantation. The spontaneously regenerated plant cover was mainly represented by the dominant Pinus caribaea, a shrub (Sannantha leratii), and a grass (Costularia comosa). The density of pine seedlings was significantly higher in the moderately amended zone (1.2 and 0.2 pines m -2 for 0.5 and 30 t DW ha -1 respectively). The same tendency was observed for S. leratii, but for C. comosa, no net change was observed. With no amendment, after 5 years many species were present, although aboveground biomass (0.3 kg m -2 ) was low, whereas, with sludge amendment, aboveground biomass was high (5 kg m -2 ) but diversity low. Amendment increased pine tree heights from 0.15 to 3.92 m with increased amendment from 0 to 30 t DW ha -1 . The uptake of nitrogen (N) by pine trees was also improved with sludge supply, as was the uptake of phosphorus (P). Regarding S. leratii, N and P levels were highest at the sludge dosage of 2 t DW ha -1 . Carbon storage in P. caribaea biomass increased from 0.40 to 180 kg m -2 with increased amendment applied. Five years after spreading at the highest amendment levels, available soil P remained enhanced. For heavy metal uptake by pine trees, no significant effect of sewage sludge was observed. The optimal dosage to stimulate biodiversity was 0.5-2 t DW ha -1 but maximal biomass was reached at 8-30 t DW ha -1 .

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Soil development of an artificial soil mix: nutrient dynamics, plant growth, and initial physical changes

Cited by 10 publications

References 0 publications

Effects of sewage sludge stabilization on organic‐N mineralization in two soils

Effects of sewage sludge stabilization on organic‐N mineralization in two soils

Shift in soil–plant nitrogen dynamics of an alpine–nival ecotone

Sewage sludge application for spontaneous plant restoration of a New Caledonian Ferralsol

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