Lignin biochemistry and soil N determine crop residue decomposition and soil priming
نویسندگان
چکیده
منابع مشابه
Soil C and N availability determine the priming effect: microbial N mining and stoichiometric decomposition theories.
The increasing input of anthropogenically derived nitrogen (N) to ecosystems raises a crucial question: how does available N modify the decomposer community and thus affects the mineralization of soil organic matter (SOM). Moreover, N input modifies the priming effect (PE), that is, the effect of fresh organics on the microbial decomposition of SOM. We studied the interactive effects of C and N...
متن کاملRemote sensing of crop residue cover and soil tillage intensity
Management of plant litter or crop residues in agricultural fields is an important consideration for reducing soil erosion and increasing soil organic C. Current methods of quantifying crop residue cover are inadequate for characterizing the spatial variability of residue cover within fields or across large regions. Our objectives were to evaluate several spectral indices for measuring crop res...
متن کاملSoil Biochemistry
Soil biochemistry is one of the branches of soil science dealing with the formation and decomposition of soil organic matter, biochemical reactions of carbon, nitrogen, phosphorus, sulfur, metals and xenobiotics in soils, and biochemistry of the plant-root rhizosphere. This chapter is divided into eleven sections, the first of which provides a definition of soil biochemistry and its scope of in...
متن کاملSoil Carbon and Nitrogen Fractions and Crop Yields Affected by Residue Placement and Crop Types
Soil labile C and N fractions can change rapidly in response to management practices compared to non-labile fractions. High variability in soil properties in the field, however, results in nonresponse to management practices on these parameters. We evaluated the effects of residue placement (surface application [or simulated no-tillage] and incorporation into the soil [or simulated conventional...
متن کاملLabile soil carbon inputs mediate the soil microbial community composition and plant residue decomposition rates.
Root carbon (C) inputs may regulate decomposition rates in soil, and in this study we ask: how do labile C inputs regulate decomposition of plant residues, and soil microbial communities? In a 14 d laboratory incubation, we added C compounds often found in root exudates in seven different concentrations (0, 0.7, 1.4, 3.6, 7.2, 14.4 and 21.7 mg C g(-1) soil) to soils amended with and without (13...
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ژورنال
عنوان ژورنال: Biogeochemistry
سال: 2015
ISSN: 0168-2563,1573-515X
DOI: 10.1007/s10533-015-0101-8