Nitrogen and carbon mineralization of surface-applied and incorporated winter wheat and peanut residues

Jin, Ke Sheng; Sleutel, Steven; Gabriëls, Donald; Dan, Cai; Jin, Jian; Hofman, Georges

doi:10.1007/s00374-008-0267-5

Cited by 35 publications

(20 citation statements)

References 10 publications

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“…There is, however, a sizable body of literature describing the effects of incorporating high C:N ratio residues into the soil system and subsequent increases in N immobilization (Schomberg et al 1994;Recous et al 1995;Burgess et al 2002;Jin et al 2008). In forestry systems, N transfer from soil to surface residues accounted for total N-immobilization in the forest litter layer during the first year of decomposition ( H a rt a n d F i r e s t o n e 1 9 9 1 ) .…”

Section: Introductionmentioning

confidence: 99%

Establishing the relationship of soil nitrogen immobilization to cereal rye residues in a mulched system

et al. 2018

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Background and aims Soil nitrogen (N) immobilization from cover crop residues may help suppress weeds. We established a gradient of cereal rye shoot biomass to determine the extent that soil N can be immobilized and its effect on redroot pigweed (Amaranthus retroflexus L.). . Pigweed tissue N and biomass were reduced in the presence of cereal rye. The magnitude of pigweed N reduction was similar across all shoot application rates. Conclusions We found weak evidence for a cereal rye shoot-based N immobilization mechanism of weed suppression. Our results indicate N immobilization may be primarily due to root residues.

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Section: Introductionmentioning

confidence: 99%

Establishing the relationship of soil nitrogen immobilization to cereal rye residues in a mulched system

et al. 2018

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“…What has been studied are the effects of incorporating high C:N residues with tillage and the subsequent microbial N immobilization-a process in which N is sequestered by microbes and incorporated into proteins and other organic N constituents (Schomberg et al 1994;Recous et al 1995;Burgess et al 2002;Jin et al 2008). Research evaluating high C/N cover crop surface residue impacts on N immobilization in agricultural systems is sparse (Marinari et al 2010).…”

Section: Introductionmentioning

confidence: 99%

In situ validation of fungal N translocation to cereal rye mulches under no-till soybean production

et al. 2016

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Background and aims The ability of grass mulches to inhibit weed performance has been linked to their limitations on nitrogen availability to the weeds. Fungal translocation of N from the soil to the surface mulch has been confirmed in laboratories, but this mechanism has not been documented under field conditions. Methods Experiments used 15 N (NH 4 ) 2 SO 4 , 99.7 at.%, which was uniformly injected below the soil surface at a rate of 1 mg 15 N kg −1 soil. Some plots were treated with a fungicide (Captan) every 2 weeks after injection, while others were not treated. Nitrogen transfer was monitored by measuring levels in surface residue, soybean tissue, and extractable soil inorganic N pools.Results Despite the N release from the cereal rye (Secale cereale L.) tissues ranging from 15 to 50 kg N ha, there was a detectable increase in 15 N enrichment of 10-15 % in the cereal rye tissue. Six weeks after injection, tissue from the plots not treated with fungicide contained 36 % more 15 N. ConclusionsThe increased 15 N enrichment in the cereal rye mulch supports laboratory observations that soil inorganic N is translocated into surface mulch via fungal mechanisms. These findings illustrate microbialmediated sinks for nitrogen in cereal rye mulches in no-till soybean production systems.

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“…If straw incorporation showed the strong N immobilization, it may be sufficient to prevent part of the mineral N pool from leaching. Also net N mineralization can be expected during the subsequent cropping season together with enhancing synchronization of N supply and demand (Jin et al, 2008). Our investigation suggests that with decreasing N min concentration in the soil in the second growing season of barley, the impact on microbes decreased.…”

Section: Discussionmentioning

confidence: 61%

“…With reduced N min content in the soil there was lower nitrate concentration in soil leachate (r = 0.62, P < 0.05). The straw incorporation can also reduce the nitrogen leaching (Jin et al, 2008) due to high N immobilization (Vinten et al, 2002). When straw was incorporated into the upper soil layer by a stubble breaker, part of nitrogen presumably was included into the biomass of microorganisms or soil organic matter, therefore N min content in the 0-40 cm soil layer decreased.…”

Section: Discussionmentioning

confidence: 99%

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Soil mineral nitrogen and microbial parameters as influenced by catch crops and straw management

Janušauskaitė

Arlauskienė

Maikštėnienė

2013

Zemdirbyste-Agriculture

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Agricultural management can affect soil chemistry, nutrient cycling and microbial properties, but the relationship among them is not well explored. Catch crops play an important role in decreasing nitrogen (N) leaching in the autumn, and thereby reduce undesirable environmental effects, improve soil physical and microbiological properties. We investigated the effect of catch crops and straw management on soil mineral nitrogen (N min ) and microbial activity on a clay loam Gleyic Cambisol (CMg). A two-factor experiment was set up: 1) catch crops (narrow-leafed lupin, mixture of narrow-leafed lupin and oats, white mustard and without catch crops), and 2) straw management methods (with and without). The total amount of bacteria and fungi, dehydrogenase and urease activity, and potential nitrification rate were assayed during two successive spring barley growing seasons. Also we determined N in the soil and soil leachate. Our experimental findings indicated that the N min dynamics in the soil and nitrate nitrogen (N-NO 3 ) leaching depended on the catch crops, the amount of decomposers and the weather conditions. Cultivation of post-harvest catch crops in a clay loam Cambisol reduced N min content by 50-62% at the 0-40 cm soil layer, stubble breaking in the autumn by 23-41%, compared with the soil where the stubble had not been broken and no catch crops had been grown. Also, cultivation of catch crops reduced nitrate (N-NO 3 ) concentration in the soil leachate by 32-62%. The biological variables differed among all treatments, especially among years. Higher counts of heterotrophic bacteria and fungi and greater enzymatic activity were recorded in the plots with catch crops. Higher nitrification activity was established in the plots without catch crops. The amount of cellulose degrading bacteria did not differ significantly between the treatments. Further research is needed to get a better insight into the processes of mineralization and immobilization of catch crops' residues and soil N min and N-NO 3 leaching in agricultural ecosystems.

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Nitrogen and carbon mineralization of surface-applied and incorporated winter wheat and peanut residues

Cited by 35 publications

References 10 publications

Establishing the relationship of soil nitrogen immobilization to cereal rye residues in a mulched system

Establishing the relationship of soil nitrogen immobilization to cereal rye residues in a mulched system

In situ validation of fungal N translocation to cereal rye mulches under no-till soybean production

Soil mineral nitrogen and microbial parameters as influenced by catch crops and straw management

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