Effects of organic matter, moisture content and other environmental factors on denitrification in topsoils of an upland field

Nishio, Takeshi; Kanamori, Tetsuo; Fujimoto, T.

doi:10.1080/00380768.1988.10415583

Cited by 10 publications

(7 citation statements)

References 18 publications

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“…Soil mineral N contents are generally not limiting to denitrification activity in cultivated soils (Myrold and Tiedje 1985a;Nishio et al 1987). In such cases, increased N fertilization would not influence denitrification, and soil mineral N contents would be poorly related to this process.…”

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confidence: 99%

Nitrous oxide production in soils cropped to corn with varying N fertilization

Chantigny¹,

Prévost²,

Angers³

et al. 1998

Can. J. Soil. Sci.

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. 1998. Nitrous oxide production in soils cropped to corn with varying N fertilization. Can. J. Soil Sci. 78: [589][590][591][592][593][594][595][596]. Mineral N fertilizers may contribute to N gas emissions to the atmosphere. Soil cores were collected in 1993 and 1994, in a sandy loam and a sandy clay cropped with an early-maturing corn (Zea mays L.) hybrid and fertilized with ammonium nitrate at rates of 10, 60, 120 or 180 kg N ha -1 . Denitrification and N 2 O production rates, air-filled porosity (AFP), water-soluble mineral N (WSMN) and water-soluble organic C (WSOC) were measured. Denitrification and N 2 O production rates were generally small, but values >2 µg N 2 O-N kg -1 h -1 were measured (i) when WSMN contents exceeded 5 mg kg -1 , and (ii) when AFP was <50 to 55% in the sandy loam, and <40 to 45% in the sandy clay. For most sampling dates, N 2 O production and denitrification rates increased with N fertilizer level. In 1993, AFP was relatively high and variable in soil cores, and regression analyses revealed that denitrification rates were closely related to AFP. In 1994, AFP was relatively low in soil cores, and regression analyses showed that denitrification and N 2 O production rates were positively related to WSMN and negatively to WSOC. It is suggested that provided AFP was low, N fertilization may have had either a direct effect on denitrification and N 2 O production rates by determining WSMN availability to microorganisms, or an indirect effect by affecting WSOC metabolism in soil. Depending on the year and soil type, mean denitrification rates were 40 to 130% greater in the soil with 180 than with 120 kg N ha -1 . Corresponding N 2 O production rates were 50 to 200% higher in the 180 than in the 120 kg N ha -1 treatment. It appears that limiting N fertilizer to 120 kg ha -1 , under early-maturing corn production, may prevent excessive gaseous N losses due to denitrification. Il semble que, lorsque la POA était faible, le fertilisant azoté a eu un effect direct sur la dénitri-fication et la production de N 2 O en conditionnant la disponibilité de l'AMH. Le fertilisant aurait aussi eu un effet indirect en affectant le métabolisme du COH. Selon l'année et le type de sol, les taux moyens de dénitrification ont été de 40 à 130 % supérieurs dans les sols recevant 180 que dans ceux recevant 120 kg N ha -1 . Les taux de production de N 2 O ont été de 50 à 200 % supérieurs dans les parcelles avec 180 que dans celles avec 120 kg N ha -1 . Sous une culture de maïs hâtif, restreindre la fertilisation à 120 kg N ha -1 permettrait d'éviter des pertes excessives d'azote causées par la dénitrification.

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confidence: 99%

Nitrous oxide production in soils cropped to corn with varying N fertilization

Chantigny¹,

Prévost²,

Angers³

et al. 1998

Can. J. Soil. Sci.

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“…Differences in the DEA, TOC or calibrated DOC in the non‐fertilizer, non‐nitrogen and chemical fertilizer plots may have been caused by differences in the crop‐derived organic carbon. One study reported that the denitrification capacity of an upland field surface is enhanced by maize cropping (Nishio et al. 1988).…”

Section: Discussionmentioning

confidence: 99%

“…Differences in the DEA, TOC or calibrated DOC in the non-fertilizer, non-nitrogen and chemical fertilizer plots may have been caused by differences in the cropderived organic carbon. One study reported that the denitrification capacity of an upland field surface is enhanced by maize cropping (Nishio et al 1988). In our study, the average barley yield over 20 years was 3.33 Mg ha -1 in the chemical fertilizer plot of the cereal zone (2), 3.91 Mg ha -1 in the chemical fertilizer plot of the vegetable zone (7), 1.36 Mg ha -1 in the non-nitrogen plot (1) and 0.57 Mg ha -1 in the non-fertilizer plot (6) (Katamine et al 2001).…”

Section: Influence Of Organic Matter Application On Denitrification Ementioning

confidence: 99%

Vertical distribution of denitrification activity in an Andisol upland field and its relationship with dissolved organic carbon: Effect of long-term organic matter application

Kamewada

2007

Soil Science and Plant Nutrition

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The denitrification enzyme activity (DEA) and dissolved organic carbon (DOC) concentration in soil from the plow layer to a depth of 5 m were measured in an Andisol upland field to which several types of organic matter had been continuously applied for 20 years. The DEA was measured using the acetylene inhibition method. The DEA values at the plow layer were 0.15-0.16 mmol N kg -1 per day in the chemical fertilizer plots. Higher DEA values were detected in all the plots to which organic matter had been applied: 0.19 mmol N kg -1 per day in the rice straw manure plot and 0.81 mmol N kg -1 per day in the pig dung plot. In contrast, lower DEA values were detected in the non-nitrogen and non-fertilizer plots, that is, 0.02 and 0.03 mmol N kg -1 per day, respectively. The DEA values correlated with total organic carbon (TOC) values, total nitrogen (T-N) values, nitrogen mineralization rate, and available P measured using the Bray No.2 test; a highly significant correlation coefficient was obtained for the DOC (pH 5.5-6.0) calibrated with pH-DOC relations. In all plots examined, the plow layers showed the highest DEA values, and these dropped abruptly between depths of 0.5 and 1.0 m. At depths lower than 1.0 m, the DEA ranged from 10 -4 to 10 -5 mmol N kg -1 per day in all plots despite remarkable differences in DEA in the plow layers among plots. These observations suggested that the application of organic matter enhances the organic carbon content and DEA values in the plow layer, the extent of which is largely influenced by the variety and quantity of the applied organic matter. However, the properties of the applied organic matter did not influence the organic carbon contents or the DEA values at the subsurface. Furthermore, our investigations confirmed that subsurface denitrification did not substantially decrease the nitrate concentration during downward infiltration.

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“…However. it is reasonable to assume that the layer between 10 and 20 cm was the most active site for denitrification, because the denitrification potentials rapidly decreased with depth in an upland soil (Nishio 1989) and the ratio of the solidphase in the 10-20 cm layer was higher than that in the 20-30 cm layer (Fig. 6).…”

Section: Discussionmentioning

confidence: 99%

“…Denitrification in soil is likely to be affected by the application of available organic C (Bowman and Focht 1974;Lalisse-Grundmann et al 1988;Nishio et al 1988). Buford and Bremner (1975) demonstrated the existence of a close relationship between the denitrification capacity and in the amount of water-soluble organic carbon in 17 soils.…”

mentioning

confidence: 99%