Seasonal changes in nitrification potential associated with application of N fertilizer and compost in maize systems of southwest Michigan

Fortuna, Ann‐Marie; Harwood, Richard R.; Robertson, G. Philip; Fisk, John W.; Paul, Eldor A.

doi:10.1016/s0167-8809(02)00232-3

Cited by 40 publications

(23 citation statements)

References 23 publications

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“…Decreased N immobilization in microbial biomass, namely if it occurs in autumn when the amount of soluble soil N increases, could cause a problem in the future N balance of the system. Further indicators of an accelerated soil N cycle in the fertilized treatments could indicate a slight increase in net nitrification rate in the organic soil, which was also found by Zhong et al (2007) and Fortuna et al (2003) in other fertilized soils. These might also include the observed slight increase in the activity of denitrifying enzymes in the highly fertilized treatment of the mineral soil.…”

Section: Changes In Soluble C and N Pools And Their Transformationssupporting

confidence: 60%

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Nutrient addition retards decomposition and C immobilization in two wet grasslands

et al. 2012

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Eutrophication is one of the biggest environmental problems facing wetlands. However, its effect on soil functioning is not yet well understood. We tested the hypothesis that increased nutrient loading into wet grassland ecosystems accelerates soil C and N cycles and decreases microbial immobilization of C and N. Experimental sites were established on two wet grasslands, with either mineral or peaty soils, and fertilized by NPK fertilizer for 3 years. Soils were analyzed for soluble and microbial C and N contents and their transformations, profile of phospholipid fatty acids and number of nirK denitrifiers. Fertilization affected C more than N transformations. Opposite to what was predicted, decomposition was retarded, the soil C cycle was based more on labile C compounds, and the soil was more susceptible to C losses in fertilized versus unfertilized treatments in both soils. Fertilization resulted in lower microbial biomass C and microbial C immobilization and also decreased the activity of lignin-degrading enzymes. Shifts in the composition of the microbial communities led to decreased (1) decomposition of complex organic compounds and (2) immobilization of transformed C. Net nitrification and microbial N immobilization tended to increase in fertilized treatments indicating an acceleration of soil N cycling and losses, but only in the more vulnerable organic soil.

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Section: Changes In Soluble C and N Pools And Their Transformationssupporting

confidence: 60%

“…Eutrophication accelerates the soil N cycle and increases N losses from ecosystems. Net nitrification usually increases (Fortuna et al, 2003;Zhong et al, 2007) and becomes a dominating process (Subbarao et al, 2006). The denitrification rate also increases with nitrogen loads to soil (Niboyet et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Nutrient addition retards decomposition and C immobilization in two wet grasslands

et al. 2012

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“…In addition, soil microbial biomass and its nutrient-cycle regulation power has been severely weakened in modern agricultural systems, leading to de-synchrony between soil-N mineralization and plant N demand [34]. Soil nitrification rates have indeed increased several-fold in modern production systems compared to traditional agricultural systems [31,[35][36][37]. Our studies with Alfisols managed under traditional farming practices, i.e.…”

Section: Introductionmentioning

confidence: 92%

Suppression of soil nitrification by plants

et al. 2015

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Nitrification, the biological oxidation of ammonium to nitrate, weakens the soil's ability to retain N and facilitates N-losses from production agriculture through nitrate-leaching and denitrification. This process has a profound influence on what form of mineral-N is absorbed, used by plants, and retained in the soil, or lost to the environment, which in turn affects N-cycling, N-use efficiency (NUE) and ecosystem health and services. As reactive-N is often the most limiting in natural ecosystems, plants have acquired a range of mechanisms that suppress soil-nitrifier activity to limit N-losses via N-leaching and denitrification. Plants' ability to produce and release nitrification inhibitors from roots and suppress soil-nitrifier activity is termed 'biological nitrification inhibition' (BNI). With recent developments in methodology for in-situ measurement of nitrification inhibition, it is now possible to characterize BNI function in plants. This review assesses the current status of our understanding of the production and release of biological nitrification inhibitors (BNIs) and their potential in improving NUE in agriculture. A suite of genetic, soil and environmental factors regulate BNI activity in plants. BNI-function can be genetically exploited to improve the BNI-capacity of major food- and feed-crops to develop next-generation production systems with reduced nitrification and N2O emission rates to benefit both agriculture and the environment. The feasibility of such an approach is discussed based on the progresses made.

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“…Risasi et al (1999) reported that corn root residues immobilize N for as much as 24 wk. Fortuna et al (2003) also reported that decreased N availability (immobilization) reduced yields in a continuous corn system with compost (50% oak [Quercus spp. ] leaves and 50% dairy manure).…”

Section: Nitrogen Mineralizationmentioning

confidence: 99%

Long‐Term Tillage and Poultry Litter Impacts Soil Carbon and Nitrogen Mineralization and Fertility

Watts

Torbert

Prior

et al. 2010

Soil Science Soc of Amer J

105

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Long‐term tillage and manure application can alter a soil's ability to sequester nutrients and mineralize C and N. A laboratory incubation study (C and N mineralization) evaluated the long‐term impact of poultry litter (PL) application (>10 yr) and tillage practice (>25 yr). Soil chemical properties (pH, total C, total N, and Mehlich‐1 extractable P, K, Ca, and Mg) were also assessed. Soil was collected (0–5‐, 5–10‐, and 10–20‐cm depths) from continuous soybean [Glycine max (L.) Merr.] and corn (Zea mays L.) systems managed under conventional tillage (CT) or no‐till (NT) with either PL or inorganic fertilizer (IF) applications. The study was located in northeast Alabama on a Hartsells fine sandy loam (a fine‐loamy, siliceous, subactive, thermic Typic Hapludult). Poultry litter and NT increased soil nutrients (N, P, K, Ca, and Mg), primarily at the 0‐ to 5‐cm depth. No‐till concentrated nutrients near the soil surface as opposed to the more even distribution seen under CT. The NT‐PL treatment had higher soil C for corn and soybean (2.25 and 1.83 g kg−1 C, respectively), followed by NT‐IF (1.73 and 1.11 g kg−1 C, respectively). Carbon and N mineralization was higher at the 0‐ to 5‐cm depth for NT and CT compared with lower depths. Long‐term PL application increased C and N mineralization more than IF. As depth increased, more C and N mineralization occurred under CT due to plow layer mixing. Results indicated that long‐term tillage with PL application can increase soil C and N mineralization, nutrient retention, and organic matter.

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Seasonal changes in nitrification potential associated with application of N fertilizer and compost in maize systems of southwest Michigan

Cited by 40 publications

References 23 publications

Nutrient addition retards decomposition and C immobilization in two wet grasslands

Nutrient addition retards decomposition and C immobilization in two wet grasslands

Suppression of soil nitrification by plants

Long‐Term Tillage and Poultry Litter Impacts Soil Carbon and Nitrogen Mineralization and Fertility

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