Effects of nitrogen and intensive mixing on decomposition of ~(14)C-labelled maize (Zea mays L.) residue in soils of different land use types

摘要

Effect of increased N inputs on C sequestration in soil remains unclear because of various interactions with land use types. Soil disturbance caused by tillage is an important factor affecting the decomposition rates of SOM and litter. The objectives were to quantify the effects of mineral N addition and intensive mixing (simulated tillage) on the decomposition of ~(14)C-labelled maize residues and SOM in plow (PT), reduced tillage (RT) and grassland soils (GL).