Initial utilization of rhizodeposits with rice growth in paddy soils: Rhizosphere and N fertilization effects

  title={Initial utilization of rhizodeposits with rice growth in paddy soils: Rhizosphere and N fertilization effects},
  author={Yalong Liu and Tida Ge and Jun Ye and Shou-long Liu and Olga B. Shibistova and Ping Wang and Jingkuan Wang and Yan-guo Li and Georg Guggenberger and Yakov Kuzyakov and Jinshui Wu},
Abstract Rhizodeposition represents a readily available C and energy source for soil microorganisms, that plays an important role in the regulation of C and nutrient cycling in ecosystems and exerts a strong influence on C sequestration. The dynamics of rice rhizo-C in soils and its allocation to microorganisms during rice growth, as well as the effects of nitrogen (N-NH4+) fertilization are poorly understood, particularly with respect to the initial uptake of rhizo-C by microorganisms and its… 
Legacy effect of elevated CO2 and N fertilization on mineralization and retention of rice (Oryza sativa L.) rhizodeposit-C in paddy soil aggregates
Rhizodeposits in rice paddy soil are important in global C sequestration and cycling. This study explored the effects of elevated CO2 and N fertilization during the rice growing season on the
Nitrogen fertilization alters the distribution and fates of photosynthesized carbon in rice–soil systems: a 13C-CO2 pulse labeling study
AimsAlthough nitrogen (N) fertilization is widely used to increase rice yield, its impact on the distribution, transformation, and fates of photosynthetic carbon (C) in rice–soil systems is poorly
Allocation of assimilated carbon in paddies depending on rice age, chase period and N fertilization: Experiment with 13CO2 labelling and literature synthesis
Multiple pulse labelling at various plant growth stages and taking multiple subsequent samples as well as nutrient availability should be considered for tracing C flows more accurately for precise C balance in rice paddy systems.
Carbon input and allocation by rice into paddy soils: A review
Abstract Knowledge of belowground C input by rice plants and its fate is essential for managing C cycling and sequestration in paddy soils. Previous reviews have summarized C input and the pathways
Biogeochemical cycles of key elements in the paddy-rice rhizosphere: Microbial mechanisms and coupling processes
Abstract Rice feeds more than 50% of the world’s population, 88% of which is planted in paddy fields. Paddy-rice rhizosphere is a unique habitat characterized by redox heterogeneity that is generated
Nitrogen fertilizer is a key factor affecting the soil chemical and microbial communities in a Mollisol.
It is proved that interaction of N fertilizer with other fertilizers can affect microbial communities, and pH, total organic C, and total N show a high correlation with bacterial community composition.
Carbon, nitrogen, and phosphorus stoichiometry mediate sensitivity of carbon stabilization mechanisms along with surface layers of a Mollisol after long-term fertilization in Northeast China
Soil organic carbon (SOC) is an important parameter determining soil fertility and sustaining soil health. How C, N, and P contents and their stoichiometric ratios (C/N/P) regulate the nutrient
Effects of root exudate stoichiometry on CO2 emission from paddy soil
Abstract Root exudates are a labile source of carbon (C) for microorganisms that can lead to increased CO2 emission. Root exudates can vary in C:N stoichiometric ratio and their impact on microbially
C:N:P stoichiometry regulates soil organic carbon mineralization and concomitant shifts in microbial community composition in paddy soil
Stoichiometric control of input substrate (glucose) and native soil organic C (SOC) mineralization was assessed by performing a manipulation experiment based on N or P fertilization in paddy soil.
Nitrogen fertilizer enhances zinc and cadmium uptake by hyperaccumulator Sedum alfredii Hance
PurposeNitrogen (N) fertilization is known to have a substantial effect on heavy metal uptake in plants. However, the impact of N fertilization on plant growth and heavy metal uptake of


Rice rhizodeposition and its utilization by microbial groups depends on N fertilization
It is concluded that belowground C allocation and rhizodeposition by rice, microbial utilization of rhizdeposited C, and its stabilization within SOM pools are strongly affected by N availability:N fertilization adequate to the plant demand increases C incorporation in all these polls, but excessive N fertilization has negative effects not only on environmental pollution but also on C sequestration in soil.
Microbial response to rhizodeposition depending on water regimes in paddy soils
The findings indicate that belowground C input by rhizodeposition and its biological cycling was significantly influenced by water regimes in rice systems.
Nitrogen fertilization increases rice rhizodeposition and its stabilization in soil aggregates and the humus fraction`
Background and aimsRhizodeposited-carbon (C) plays an important role in regulating soil C concentrations and turnover, however, the distribution of rhizodeposited-C into different soil organic carbon
Incorporation of 13C-labelled rice rhizodeposition carbon into soil microbial communities under different water status
Abstract The overall processes by which carbon is fixed by plants in photosynthesis then released into the soil by rhizodeposition and subsequently utilized by soil micro-organisms, links the
Microbial immobilisation of 13C rhizodeposits in rhizosphere and root-free soil under continuous 13C labelling of oats
The use of continuous isotopic labelling and physical separation of root-free and rhizosphere soil, combined with natural 13 C abundance were effective in gaining new insight on soil and Rhizosphere C-cycling.
Contribution of plant-derived carbon to soil microbial biomass dynamics in a paddy rice microcosm
Abstract. An understanding of the microbial biomass dynamics in rice paddies is essential for managing their nutrient and C cycling. Our objectives were to determine whether the seasonal dynamics of
Microbial utilization of rice root exudates: 13C labeling and PLFA composition
The rapid incorporation of carbon from root exudates into microorganisms in paddy soils depends on the growth stage of the rice plant and is the first step of C utilization in rice rhizosphere, further defining C utilization and stabilization.
Fate of rice shoot and root residues, rhizodeposits, and microbial assimilated carbon in paddy soil - part 2: turnover and microbial utilization
Background and aimsThe turnover of plant- and microbial- derived carbon (C) plays a significant role in the soil organic C (SOC) cycle. However, there is limited information about the turnover of the
Fate of rice shoot and root residues, rhizodeposits, and microbe-assimilatedcarbon in paddy soil – Part 1: Decomposition and priming effect
Abstract. The input of recently photosynthesized C has significant implications on soil organic C sequestration, and in paddy soils, both plants and soil microbes contribute to the overall C input.
Carbon and nitrogen availability in paddy soil affects rice photosynthate allocation, microbial community composition, and priming: combining continuous 13C labeling with PLFA analysis
Background and aimsCarbon (C) and nitrogen (N) availability in soil change microbial community composition and activity and so, might affect soil organic matter (SOM) decomposition as well as