Kinetics of Soil Nitrogen Mineralization From Undisturbed and Disturbed Soil

Ringuelet, Ariel; Bachmeier, O. A.

doi:10.1081/css-120015916

Cited by 9 publications

(6 citation statements)

References 43 publications

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“…This is in line with the concept that physical disruption of soils increases microbial accessibility to intrinsically labile but physically protected OM inside aggregates (Six et al, 2000). The increase in N mineralization for our soils was not as large as previously observed by Ringuelet & Bachmeier (2002;200% increase) and Cabrera & Kissel (1988;67-343% increase), probably because here soil disturbance was not as drastic as in those studies. For all POM fractions, the correlation was slightly stronger with k field and k turn measured from disturbed than from undisturbed soil.…”

Section: Discussionsupporting

confidence: 92%

Soil organic matter fractionation as a tool for predicting nitrogen mineralization in silty arable soils

Kader

Sleutel

Begum

et al. 2010

Soil Use and Management

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After decades of searching for a practical method to estimate the N mineralization capacity of soil, there is still no consistent methodology. Indeed it is important to have practical methods to estimate soil nitrogen release for plant uptake and that should be appropriate, less time consuming, and cost effective for farmers. We fractionated soil organic matter (SOM) to assess different fractions of SOM as predictors for net N mineralization measured from repacked (disturbed) and intact (undisturbed) soil cores in 14 weeks of laboratory incubations. A soil set consisting of surface soil from 18 cereal and root-cropped arable fields was physically fractionated into coarse and fine free particulate OM (coarse fPOM and fine fPOM), intra-microaggregate particulate OM (iPOM) and silt and clay sized OM. The silt and clay sized OM was further chemically fractionated by oxidation with 6% NaOCl to isolate an oxidation-resistant OM fraction, followed by extraction of mineral bound OM with 10% HF (HF-res OM). Stepwise multiple linear regression yielded a significant relationship between the annual N mineralization (kg N/ha) from undisturbed soil and coarse fPOM N (kg N/ha), silt and clay N (kg N/ha) and its C:N ratio (R2 = 0.80; P < 0.01). The relative annual N mineralization (% of soil N) from disturbed soils was related to coarse fPOM N, HF-res OC (% of soil organic carbon) and its C:N ratio (R2 = 0.83; P < 0.01). Physical fractions of SOM were thus found to be the most useful predictors for estimating the annual N mineralization rate of undisturbed soils. However, the bioavailability of physical fractions was changed due to the disturbance of soil. For disturbed soils, a presumed stable chemical SOM fraction was found to be a relevant predictor indicating that this fraction still contains bio-available N. The latter prompted a revision in our reasoning behind selective oxidation and extraction as tools for characterizing soil organic N quality with respect to N availability. Nonetheless, the present study also underscores the potential of a combined physical and chemical fractionation procedure for isolating and quantifying N fractions which preferentially contribute to bulk soil N mineralization. The N content or C:N ratio of such fractions may be used to predict N mineralization in arable soils

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Section: Discussionsupporting

confidence: 92%

Soil organic matter fractionation as a tool for predicting nitrogen mineralization in silty arable soils

Kader

Sleutel

Begum

et al. 2010

Soil Use and Management

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“…Figure 2 presents the cumulative mineralized N of alternative leaching 30 weeks' aerobic incubation averaged among the 11 soil samples. Comparing D and UD treatments for both unleaching (UL) and leaching (L) soil samples, the amount of N mineralized in D soil samples was larger than that in UD soil samples, as found by other authors (Cabrera and Kissel 1988;Sierra 1992;Stenger, Priesack, and Beese 1995;Ringuelet and Bachmeier 2002). This result indicated that any disturbance introduced by soil preparation has a strong influence on subsequent N mineralization.…”

Section: Methodssupporting

confidence: 59%

Comparative Study on Disturbed and Undisturbed Soil Sample Incubation for Estimating Soil Nitrogen-Supplying Capacity

Zhao¹,

et al. 2010

Communications in Soil Science and Plant Analysis

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Application of nitrogen (N) fertilizers without knowing the N-supplying capacity of soils may lead to low N use efficiency, uneconomical crop production, and pollution of the environment. Based on the results from pot experiments treated with soil initial nitrate leaching and native soil, long-term alternate leaching aerobic incubation was conducted to study the disturbed and undisturbed soil N-supplying capacity of surface soil samples in 11 sites with different fertilities on the Loess Plateau. The results indicated that the entire indexes and ryegrass (Lolium perenne) uptake N with soil initial nitrate leaching showed a better correlation than that without soil initial nitrate leaching. Except the correlation coefficients for soil initial nitrate (NO 3 − )-N and mineral N extracted by calcium chloride (CaCl 2 ) before aerobic incubation with ryegrass uptake without soil initial nitrate leaching, the correlation coefficients for soil initial NO 3 − -N and mineral N extracted by CaCl 2 before aerobic incubation with ryegrass uptake with soil initial nitrate leaching and those for mineralizable N extracted by aerobic incubation, soil initial mineral N and mineralizable N extracted by aerobic incubation, potentially mineralizable N (N 0 ) and soil initial mineral N + N 0 with ryegrass uptake N under the two cases in disturbed treatment were all higher than those in undisturbed treatment. We concluded that NO 3 − -N in soil extracted by CaCl 2 before aerobic incubation can reflect soil N-supplying capacity but cannot reflect soil potential N-supplying capacity. Without soil initial nitrate leaching, the effect of disturbed and undisturbed soil samples incubated under laboratory conditions for estimating soil N-supplying capacity was not good; however, with soil initial nitrate leaching, this method could give better results for soil N-supplying capacity. Based on the results from pot experiments treated with soil initial nitrate leaching and native soil, the mineralization of disturbed soil samples can give provide better results for predicting soil N-supplying 2371 2372 K. Zhao et al. capacity for in situ structure soil conditions on the Loess Plateau than undisturbed soil samples.

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“…Many factors are involved in the process of N mineralization, including soil moisture, temperature, texture, structure, aeration, microbial biomass, and the substrate chemical constituency (Ringuelet and Bachmeier, 2002;Drury et al, 2003;Vigil and Kissel, 1991). All of these factors interact ultimately to govern the amount of N available via mineralization from year to year.…”

Section: Nitrogen Mineralization Potentialmentioning

confidence: 99%

Mid-Season Prediction of Wheat-Grain Yield Potential Using Plant, Soil, and Sensor Measurements

Girma

Martin

Anderson

et al. 2006

Journal of Plant Nutrition

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The components that define cereal-grain yield potential have not been well defined. The objective of this study was to collect many differing biological measurements from a long-term winter wheat (Triticum aestivum L.) study in an attempt to better define yield potential. Four treatments were sampled that annually received 0, 45, 90, and 135 kg N ha −1 at fixed rates of phosphorus (P) (30 kg ha −1 ) and potassium (K) (37 kg ha −1 ). Mid-season measurements of leaf color, chlorophyll, normalized difference vegetative index (NDVI), plant height, canopy temperature, tiller density, plant density, soil moisture, soil NH 4 -N, NO 3 -N, organic carbon (C), total nitrogen (N), pH, and N mineralization potential were collected. In addition, soil texture and bulk density were determined to characterize each plot. Correlations and multiple linear-regression analyses were used to determine those variables that can predict final winter wheat grain yield. Both the correlation and regression analyses suggested mid-season NDVI, chlorophyll content, plant height, and total N uptake to be good predictors of final winter wheat grain yield. Keywords

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Kinetics of Soil Nitrogen Mineralization From Undisturbed and Disturbed Soil

Cited by 9 publications

References 43 publications

Soil organic matter fractionation as a tool for predicting nitrogen mineralization in silty arable soils

Soil organic matter fractionation as a tool for predicting nitrogen mineralization in silty arable soils

Comparative Study on Disturbed and Undisturbed Soil Sample Incubation for Estimating Soil Nitrogen-Supplying Capacity

Mid-Season Prediction of Wheat-Grain Yield Potential Using Plant, Soil, and Sensor Measurements

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