Use of nitrogen fertiliser in restoration of pasture productivity and soil fertility after topsoil mining

Hart, P. B. S.; August, J. A.

doi:10.1080/00288233.1988.10423439

Cited by 9 publications

(6 citation statements)

References 8 publications

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“…The strategic use of N fertiliser during this period would be a useful management option, as found by Gregg et al (1990). The use of N fertiliser (150 kg ha 1 in 3 split dressings) has been found to increase pasture productivity by 47 and 34% in the first and second years, respectively, of restoration following topsoil mining (Hart & August 1988). This was at a site where the total N soil value of 0.20% was similar to the 0.19% found at this trial.…”

Section: Discussionsupporting

confidence: 60%

Pasture establishment and fertiliser requirements on rehabilitated land after opencast coal mining in New Zealand

Longhurst

O'Connor

Toxopeus

1999

New Zealand Journal of Agricultural Research

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Existing pasture establishment practices to rehabilitate land after opencast mining in the Waikato coal fields area of New Zealand were examined and compared with an alternative method involving different pasture mixtures, seeding rates, and lime and fertiliser requirements. Pasture establishment and production, botanical composition changes, and plant and soil nutrient status were measured during a 2-year field trial. Highly significant pasture responses were obtained to increased fertiliser inputs. Heavy rates of fertiliser (1000 kg ha -1 superphosphate) were required to raise Olsen P soil levels during the establishment phase whereas half that rate was found to be sufficient for the maintenance phase. An improved seed mixture, containing superior pasture cultivars, established more quickly and out-yielded the existing seed mixture by 58%. The two seed mixtures responded differently to sowing rates; the higher rate increased pasture yields of the improved pasture species but decreased the existing seed mix yields. Liming at 5 t ha -1 significantly increased soil pH and clover content and reduced pasture manganese concentrations from possibly toxic levels. Nitrogen concentrations in pastures were A 98021Received 12 May 1998; accepted 5 October 1998 below optimum throughout the trial and the strategic use of nitrogen fertiliser is recommended as a useful management option.

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Section: Discussionsupporting

confidence: 60%

Pasture establishment and fertiliser requirements on rehabilitated land after opencast coal mining in New Zealand

Longhurst

O'Connor

Toxopeus

1999

New Zealand Journal of Agricultural Research

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“…This indicates that nutrient availability may have limited pasture production, with N and P the most likely nutrients to be deficient. Certainly, pasture production responses to N and P fertiliser on loessial soils in this region are good (Hart, el al., 1986;Hart and August, 1988). Although the difference in pasture production (1,300kg DM ha-') between mined and unmined Belmont soil is not significant, it does suggest that the actual quantities of nutrients being cycled in the mined soil are probably less than in the unmined soil, even though the mechanisms of nutrient cycling have substantially recovered in mined soil (e.g., microbial biomass, earthworms, enzyme activities).…”

Section: Pasture Productionmentioning

confidence: 94%

Long‐term consequences of topsoil mining on select biological and physical characteristics of two New Zealand loessial soils under grazed pasture

1989

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“…Pasture productivity at the well-studied Judgeford site was measured as part of studies to determine the impact of topsoil mining on pasture production and soil fertility (Hart and August 1988;Hart et al 1989). All data used for this study was from control treatments representing normal agricultural practices, and has been recovered from laboratory reports.…”

Section: Pasture Npp -Measurement and Modelingmentioning

confidence: 99%

Synthetic Constraint of Soil C dynamics Using 50 Years of Radiocarbon and Net Primary Production (NPP) in a New Zealand Grassland Site

Baisden

2013

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Time-series radiocarbon measurements have substantial ability to constrain the size and residence time of the soil C pools commonly represented in ecosystem models. 14 C remains unique in its ability to constrain the size and turnover rate of the large stabilized soil C pool with roughly decadal residence times. The Judgeford soil, near Wellington, New Zealand, provides a detailed 11-point 14 C time series enabling observation of the incorporation and loss of bomb 14 C in surface soil from 1959-2002. Calculations of the flow of C through the plant-soil system can be improved further by combining the known constraints of net primary productivity (NPP) and 14 C-derived C turnover. We show the Biome-BGC model provides good estimates of NPP for the Judgeford site and estimates NPP from 1956-2010. Synthesis of NPP and 14 C data allows parameters associated with the rapid turnover "active" soil C pool to be estimated. This step is important because it demonstrates that NPP and 14 C can provide full data-based constraint of pool sizes and turnover rates for the 3 pools of soil C used in nearly all ecosystem and global C-cycle models.

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Use of nitrogen fertiliser in restoration of pasture productivity and soil fertility after topsoil mining

Cited by 9 publications

References 8 publications

Pasture establishment and fertiliser requirements on rehabilitated land after opencast coal mining in New Zealand

Pasture establishment and fertiliser requirements on rehabilitated land after opencast coal mining in New Zealand

Long‐term consequences of topsoil mining on select biological and physical characteristics of two New Zealand loessial soils under grazed pasture

Synthetic Constraint of Soil C dynamics Using 50 Years of Radiocarbon and Net Primary Production (NPP) in a New Zealand Grassland Site

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