Net nitrogen mineralization, nitrification and CO2 production in alternating moisture conditions in an unfertilized low-humus sandy soil from the Sahel

Bruin, B. De; Vries, F.W.T. Penning de; Broekhoven, L.W. van; Vertregt, N.; Geijn, S.C. van de

doi:10.1007/bf02181923

Cited by 16 publications

(8 citation statements)

References 11 publications

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“…In contrast, repeated wetting and drying appeared to increase the resistance of cowpea [Vigna unguiculata (L.) Walp.] plant N compounds to microbial decomposition (Franzluebbers et al, 1994). De Bruin et al (1989 observed both net N mineralization and net nitrification to be higher under wetting/drying conditions.…”

Section: Introductionmentioning

confidence: 99%

Manure Nitrogen Availability: Dairy Manure in Northeast and Central U.S. Soils

Honeycutt

Griffin

2005

Biological Agriculture & Horticulture

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Accurate prediction of nitrogen (N) availability from manure is required for efficient utilization of this resource in crop production. This study was conducted to evaluate the impacts of temperature, water regime and selected soils on N availability from a liquid dairy (Bas taurus) manure. Two Maine soils [Caribou sandy loam (fine-loamy, mixed, frigid Typic Haplorthod) and 'Newport' loam (unnamed variant of a Bangor silt loam; coarse-loamy, mixed, frigid Typic Haplorthod)] and an Illinois soil [Catlin silt loam (fine-silty, mixed, superactive, mesic Oxyaquic Arguidoll)l were incubated in the laboratory at ll, 18 and 25"C under constant (60% water filled pore space, WFPS) and fluctuating (60 to 30% WFPS) water regimes, with and without dairy manure in a factorial arrangement. Ammonium concentrations increased immediately upon manure addition and declined thereafter as nitrate levels increased. Elevated No,-levels reflected nitrification of NH; added in the manure, with little additional net mineralization of manure organic N. Temperature strongly influenced NO,-concentration over time, but this effect could be described with the thermal unit (degree day) concept. The fluctuating water regime had no significant impact on manure-derived NO,-. Changes in manure NO,-over thermal time could be described with a single exponential equation. However, less manure NO,-was observed in an Illinois soil than in two Maine soils. Separate particle size analysis and microbial community assessments indicate higher N immobilization potential in the Illinois soil. Because soil type strongly impacted N availability, it is clear that additional soils with ranges in several physical, chemical and biological properties should be investigated to quantify these relationships with manure N availability.

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Section: Introductionmentioning

confidence: 99%

Manure Nitrogen Availability: Dairy Manure in Northeast and Central U.S. Soils

Honeycutt

Griffin

2005

Biological Agriculture & Horticulture

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“…Birch (1959aBirch ( , 1959bBirch ( , 1960b indicated that the effect of drying was both an enhanced exposure of organic surface to solution, thus increasing the amount of decomposable organic material going into solution and stimulating microbial processes on the exposed surfaces upon remoistening, as well as an increased killing off of the microflora in the soil, thus providing readily decomposable organic material for a freshly and rapidly developing population of microorganisms after wetting. However, the exact underlying mechanisms causing the flush and the relative importance of the factors contributing to it are not yet clear (Jenkinson, 1966;Kieft et al, 1987;de Bruin et al, 1989;Singh et al, 1989).…”

Section: Discussionmentioning

confidence: 99%

Soil nutrient availability in a primary outbreak area of the African armyworm, Spodoptera exempta (Lepidoptera: Noctuidae), in relation to drought intensity and outbreak development in Kenya

Janssen¹

1993

Bull. Entomol. Res.

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To explain differences between years in outbreak development of the African armyworm, Spodoptera exempta (Walker), in eastern Africa, the availability to host-plants of soil nitrogen, phosphorus and potassium was studied in a primary outbreak area during the first month after the start of the short rainy season in relation to the drought intensity during the preceding year. The weather-soil-plant interactions observed during four successive years (1988)(1989)(1990)(1991) indicated that nitrate levels, especially in soils not extremely poor in organic carbon and total nitrogen, can differ greatly between years in response to differences in drought intensity and rainfall pattern. These resulted in large differences (i.e. up to 2.0% dry wt.) in organic nitrogen levels in leaves of host-plants of S. exempta. Phosphorus and potassium levels in soils and host-plants showed no consistent relationship with the weather pattern over the years and in general their differences between years were relatively small. The occurrence of S. exempta during the first two months after the start of the short rainy season was well associated with plant nitrogen levels in the primary outbreak area: outbreaks developed only in years with at some locations organic nitrogen concentrations of almost 5% in young grasses. If fitness of S. exempta is strongly dependent on the organic nitrogen content of its food within the range encountered in this study, weather conditions during the long dry season might indirectly explain the observed differences in subsequent outbreak development via their delayed effect on host-plant nitrogen levels.

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“…Correct prediction of soil temperature and moisture are critical for the correct prediction of Nmin. Overestimation of Nmin (by 34%) at the end of autumn and during winter can be attributed to immobilization of N (De Bruin et al 1989) and possible dependence of k not only on temperature but also on the composition of organic matter (El-Harris et al, 1983). At the end of the first cultivation period fresh columns were installed in the experiment field to investigate changes in mineralisation after incorporation of plant residues (mostly roots and some leaves) and N mineralisation was measured for 28 weeks.…”

Section: Potential Mineralization Of Organic N (N Min )mentioning

confidence: 99%

Nitrogen Balance in a Poorly Draining Intensively Cultivated Soil

Moustakas

Kosmas

2017

Not Bot Horti Agrobo

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The increasing use of nitrogen in fertilizers has not only increased the productivity of agricultural crops but also the concern for the effects of high N inputs on the natural environment. Economic, agronomic and environmental concerns have led to greater efforts towards more effective utilization of nitrogenous fertilizers, which can be achieved through a better quantitative understanding of the fate of nitrogen when applied to the soil. So Nitrogen balance was investigated in a poorly draining intensively cultivated soil. Nitrogen inputs and outputs, such as additions by precipitation (N atm ), irrigation water (N irr ), commercial fertilizers (N fert ), mineralization (N min ), denitrification (N denitr ), volatilization (N gas ), capillary rise (N cap ), uptake (N upt ), residual (N res ) and leaching (N leac ) were studied and quantified during a period of 72 weeks for two growing crops (maize and wheat). Nitrogen excess or deficit at time 't' (Nt) was calculated from the following balance equation: Nt = N res + N atm + N irr + N min + N fert + N cap − N upt − N denitr -N gas − N leac . Existing models were used after proper adjustments to calculate these fluxes. Only a single model, based on soil temperature at 60 cm and NO 3 --N concentration in ground water was developed for the estimation of denitrification at the ground water boundary. The calculated values satisfactorily matched the respective experimental data. The results shown that the greater part of the applied nitrogen fertilizer was lost to ground water during the winter causing considerable environmental concern. For sustainable land use, inputs and outputs of nutrients must be balanced in order to avoid negative impacts on the environment, especially in intensively exploited agricultural ecosystems.

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Net nitrogen mineralization, nitrification and CO2 production in alternating moisture conditions in an unfertilized low-humus sandy soil from the Sahel

Cited by 16 publications

References 11 publications

Manure Nitrogen Availability: Dairy Manure in Northeast and Central U.S. Soils

Manure Nitrogen Availability: Dairy Manure in Northeast and Central U.S. Soils

Soil nutrient availability in a primary outbreak area of the African armyworm, Spodoptera exempta (Lepidoptera: Noctuidae), in relation to drought intensity and outbreak development in Kenya

Nitrogen Balance in a Poorly Draining Intensively Cultivated Soil

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