Carbon additions increase nitrogen availability in northern hardwood forest soils

Groffman, Peter M.

doi:10.1007/s003740050576

Cited by 24 publications

(12 citation statements)

References 22 publications

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“…An increase of the soil respiratory activity and qCO 2 under heavy metal stress was described by Brookes (1995) and Giller et al (1998). It was generally explained as a result of a larger microbial activity and mineralization of soil organic matter (Brookes 1995) or stimulation of the microbial activity (Groffman 1999). On the other hand, Wardle and Ghani (1995) showed that this index could respond unpredictably and some disturbances such as fertilization or liming can either decrease or increase qCO 2 .…”

Section: Resultsmentioning

confidence: 98%

Effects of liming on the microbial biomass and its activities in soils long-term contaminated by toxic elements

Mühlbachová¹,

Tlustoš²

2006

PLANT SOIL ENVIRON

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The effects of liming by CaO and CaCO 3 on soil microbial characteristics were studied during laboratory incubation of long-term contaminated arable and grassland soils from the vicinity of lead smelter near Příbram (Czech Republic). The CaO treatment showed significant negative effects on soil microbial biomass C and its respiratory activity in both studied soils, despite the fact that microbial biomass C in the grassland soil increased sharply during the first day of incubation. The metabolic quotient (qCO 2 ) in soils amended by CaO showed greater values than the control from the second day of incubation, indicating a possible stress of soil microbial pool. The vulnerability of organic matter to CaO could be indicated by the availability of K 2 SO 4 -extractable carbon that increased sharply, particularly at the beginning of the experiment. The amendment of soils by CaCO 3 moderately increased the soil microbial biomass. The respiratory activity and qCO 2 increased sharply during the first day of incubation, however it is not possible to ascribe them only to microbial activities, but also to CaCO 3 decomposition in hydrogen carbonates, water and CO 2 . The pH values increased more sharply under CaO treatment in comparison to CaCO 3 treatment. The improvement of soil pH by CaCO 3 could be therefore more convenient for soil microbial communities.

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Section: Resultsmentioning

confidence: 98%

Effects of liming on the microbial biomass and its activities in soils long-term contaminated by toxic elements

Mühlbachová¹,

Tlustoš²

2006

PLANT SOIL ENVIRON

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“…In addition to water, C and N availability can also act to control N dynamics in desert ecosystems (Westerman and Tucker 1978;Virginia et al 1982;Smith et al 1994;Gallardo and Schlesinger 1995). If C or N availability limits rates of N cycling, then changes in available C and N pools may affect nutrient dynamics by changing the size and composition of the soil organic matter (SOM) pool, either through changes in litter chemistry or quantity, or in rates of belowground production (Nadelhoffer et al 1985;Hart et al 1994;Groffman 1999;Prescott et al 2000).…”

Section: Introductionmentioning

confidence: 99%

Responses of soil nitrogen dynamics in a Mojave Desert ecosystem to manipulations in soil carbon and nitrogen availability

2003

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We investigated the effects of changes in soil C and N availability on N mineralization, nitrification, denitrification, NH(3) volatilization, and soil respiration in the Mojave Desert. Results indicate a C limitation to microbial N cycling. Soils from underneath the canopies of Larrea tridentata (DC.) Cov., Pleuraphis rigida Thurber, and Lycium spp. exhibited higher rates of CO(2 ) flux, lower rates of NH(3) volatilization, and a decrease in inorganic N (NH(4)(+)-N and NO(3)(-)-N) with C addition. In addition to C limitation, soils from plant interspaces also exhibited a N limitation. Soils from all locations had net immobilization of N over the course of a 15-day laboratory incubation. However, soils from interspaces had lower rates of net nitrification and potential denitrification compared to soils from under plant canopies. The response to changes in C availability appears to be a short-term increase in microbial immobilization of inorganic N. Under controlled conditions, and over a longer time period, the effects of C and N availability appear to give way to larger differences due to spatial location. These findings have implications for ecosystems undergoing changes in soil C and N availability due to such processes as desertification, exotic species invasions, or elevated atmospheric CO(2) concentration.

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“…In one experiment, C was added with the expectation of increased biomass C and N along with a decrease in inorganic N. The additions of C and N to the soil environment resulted in a far more complex than a simple C:N ratio (Groffman, 1999). Resulting changes in C and N are effected by multiple factors.…”

Section: Organic Carbon and Total Nitrogen In Soilsmentioning

confidence: 99%

“…It is common to find a net mineralization of N in soil when residuals are added that have high carbon (C)-to-N ratios (Groffman, 1999). It has been found that a Prediction of Wheat-Grain Yield Potential 881 C:N ratio of 25 results in a highly stable product, good fertilizer value, and low potential for possible environmental pollution (Ndegwa and Thompson, 2000).…”

Section: Organic Carbon and Total Nitrogen In Soilsmentioning

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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Carbon additions increase nitrogen availability in northern hardwood forest soils

Cited by 24 publications

References 22 publications

Effects of liming on the microbial biomass and its activities in soils long-term contaminated by toxic elements

Effects of liming on the microbial biomass and its activities in soils long-term contaminated by toxic elements

Responses of soil nitrogen dynamics in a Mojave Desert ecosystem to manipulations in soil carbon and nitrogen availability

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

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