Publications by authors named "B Janz"
Article Synopsis
- Crop residues contribute carbon and nitrogen to soils, significantly influencing nitrous oxide (N₂O) emissions, but current methods solely focus on N inputs without accounting for residue characteristics.
- Different types of crop residues, especially immature ones, have varying effects on N₂O emissions due to their biochemical qualities, highlighting the need to differentiate between mature and immature residues in emission assessments.
- To improve N₂O emission accounting, further research is required to establish emission factors for different residue types, understand emissions from belowground residues, enhance data on residue management, and evaluate the long-term impacts of residue addition on soil N₂O emissions.
High N-fertilizer applications to conventional vegetable production systems are associated with substantial emissions of NH, a key substance that triggers haze pollution and ecosystem eutrophication and thus, causing considerable damage to human and ecosystem health. While N fertilization effects on NH volatilization from cereal crops have been relatively well studied, little is known about the magnitude and yield-scaled emissions of NH from vegetable systems. Here we report on a 2-year field study investigating the effect of various types and rates of fertilizer application on NH emissions and crop yields for a pepper-lettuce-cabbage rotation system in southwest China.
View Article and Find Full Text PDFCrop residues may serve as a significant source of soil emissions of NO and other trace gases. According to the emission factors (EFs) set by the Intergovernmental Panel on Climate Change (IPCC), NO emission is proportional to the amount of N added by residues to the soil. However, the effects of crop residues on the source and sink strength of agroecosystems for trace gases are regulated by their properties, such as the C and N content; C/N ratio; lignin, cellulose, and soluble fractions; and residue humidity.
View Article and Find Full Text PDFArticle Synopsis
- The study highlights how nitrous oxide (NO) emissions from crop residue decomposition can negate the advantages of recycling those residues in agriculture.
- Researchers tested various crop residues under controlled conditions, finding that their chemical composition significantly affected NO emission levels.
- The findings suggest that higher nitrogen content in soluble components from fresh residues, like mustard and sugar beet, leads to greater NO emissions, indicating that understanding residue quality is crucial for predicting environmental impacts.
Populations of rodents such as common vole (Microtus arvalis) can develop impressive soil bioturbation activities in grasslands. These burrowing and nesting activities highly impact soil physicochemical properties as well as vegetation coverage and diversity. Managed grasslands in livestock production regions receive significant amounts of slurry, commonly at high loads at the beginning of the vegetation period.
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