Effects of sulpha drugs on nitrification of urea in soil

Prasad, Rajendra; Reddy, Ragi Mallikarjuna

doi:10.1007/bf00015156

Cited by 5 publications

(1 citation statement)

References 11 publications

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“…However, they were unable to identify the exact mechanism by which pyrite inhibits nitrification/immobilization. Furthermore, postulated that the effect of pyrite could be due to the toxic action of any one or a combination of the following: (1) sulphides20; (2) the oxidized forms of the sulphides, or (3) presence of Fe 2+ ions21. Compared to their results, a stronger inhibition of net nitrification by 50000 mg hematite kg −1 soil was observed in the present study.…”

Section: Discussioncontrasting

confidence: 70%

Effects of Fe oxide on N transformations in subtropical acid soils

Jiang

Xin

et al. 2015

Sci Rep

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Subtropical ecosystems are often characterized by high N cycling rates, but net nitrification rates are often low in subtropical acid soils. NO3−-N immobilization into organic N may be a contributing factor to understand the observed low net nitrification rates in these acid soils. The effects of Fe oxide and organic matter on soil N transformations were evaluated using a 15N tracing study. Soil net nitrification was low for highly acidic yellow soil (Ferralsols), but gross ammonia oxidation was 7 times higher than net nitrification. In weakly acidic purple soil (Cambisols), net nitrification was 8 times higher than in Ferralsols. The addition of 5% Fe oxide to Cambisols, reduced the net nitrification rate to a negative rate, while NO3−-N immobilization rate increased 8 fold. NO3−-N immobilization was also observed in Ferralsols which contained high Fe oxides levels. A possible mechanism for these reactions could be stimulation of NO3−-N immobilization by Fe oxide which promoted the abiotic formation of nitrogenous polymers, suggesting that the absence of net nitrification in some highly acid soils may be due to high rates of NO3−-N immobilization caused by high Fe oxide content rather than a low pH.

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Section: Discussioncontrasting

confidence: 70%

Effects of Fe oxide on N transformations in subtropical acid soils

Jiang

Xin

et al. 2015

Sci Rep

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Effect of rates of nitrogen and relative efficiency of sulphur-coated urea and nitrapyrin-treated urea in dry matter production and nitrogen uptake by rice

Sharma

Prasad

1980

Plant Soil

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Control of urea hydrolysis and nitrification in soil by chemicals—Prospects and problems

Sahrawat

1980

Plant Soil

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A review is made of the recent work to assess the prospects of regulating urea hydrolysis and nitrification processes in soils by employing chemicals that can retard urea hydrolysis and nitrification. The possible benefits from control of nitrogen transformations in terms of conserving and enhancing fertilizer nitrogen efficiency for crop production and the problems associated with their use with regard to N metabolism of plants have also been discussed with examples. Prospects of using cheap and effective indigenous materials and chemicals for control of urea hydrolysis and nitrification under specific soil situations appear eminent in improving the fertilizer nitrogen efficiency. Urease inhibitors may be helpful in reducing problems associated with ammonia volatilization if this is not offset by leaching of urea. On the other hand retardation of nitrification appears useful in reducing losses that accompany nitrification due to leaching and denitrification, and with the plants that metabolize equally well with relatively higher amounts of NH4-N may be more effective in improving the utilization of fertilizer N under these situations.

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Effects of sulpha drugs on nitrification of urea in soil

Cited by 5 publications

References 11 publications

Effects of Fe oxide on N transformations in subtropical acid soils

Effects of Fe oxide on N transformations in subtropical acid soils

Effect of rates of nitrogen and relative efficiency of sulphur-coated urea and nitrapyrin-treated urea in dry matter production and nitrogen uptake by rice

Control of urea hydrolysis and nitrification in soil by chemicals—Prospects and problems

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