[Carbon Cycling Processes in Croplands and Their Quantification Methods].

Recent studies have shown that the source of soil carbon(C) includes not only the input of crop C(rhizodeposit- and residue-C) to soil organic C(SOC) but also the contribution of soil autotrophic microorganisms to SOC and the fixation of soil inorganic C(SIC) from the soil inorganic chemical pathway and microbial biomineralization pathway. The level of SOC in croplands is mainly controlled by the balance between the input of crop C and the loss of SOC via decomposition. In the short term, the input of crop C usually promotes the SOC decomposition, showing a positive(rhizosphere) priming effect.

[How Different Ratios of Straw Incorporation to Nitrogen Fertilization Influence Endogenous and Exogenous Carbon Release from Agricultural Soils].

The adjustment of the C/N ratio by straw combined with fertilizer nitrogen (N) not only affects straw decomposition but also affects soil organic carbon (SOC) decomposition, i.e. the priming effects.

[Estimation of Winter Wheat Photosynthesized Carbon Distribution and Allocation Belowground via C Pulse-labeling].

Evaluating the allocation of carbon (C) photosynthesized by winter wheat belowground is essential for C sequestration in soil and crop production. During the four growth stages of winter wheat, i. e.