Effects of tillage and residue management on soil aggregates and associated carbon storage in a double paddy cropping system

Wang, Xing; Qi, Jianying; Zhang, Xiong‐Zhi; Li, Shuaishuai; Virk, Ahmad Latif; Zhao, Xin; Xiao, Xiaoping; Zhang, Hai‐Lin

doi:10.1016/j.still.2019.104339

Cited by 113 publications

(63 citation statements)

References 60 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The soils were collected using a sieve, then dried at 60 • C for 24 h, and then weighed. The mean weight diameter (MWD) and geometric mean diameter (GMD) of the soil aggregates were determined as follows [15]:…”

Section: Soil Aggregatesmentioning

confidence: 99%

“…Soil aggregates are important physical determinants preventing mineralization in soil due to the physical decrease in the accessibility of organic matter to microorganisms [12,13]. Nearly 90% of SOC sequestration occurs in soil aggregates [14]; however, SOC is not homogeneously distributed in soil aggregates of different sizes [15]. Soil aggregate stability is an important indicator for assessing SOC accumulation and mineralization.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effects of Straw Return Mode on Soil Aggregates and Associated Carbon in the North China Plain

Kan

et al. 2020

Agronomy

View full text Add to dashboard Cite

Crop straw is widely used to manage soil organic carbon (SOC) sequestration as an environmentally friendly practice in the North China Plain. However, little is known about the effects of straw returning modes on SOC sequestration in this region. Thus, a field experiment was conducted to study SOC accumulation and mineralization as well as aggregate stability and aggregate-associated SOC for the following three straw returning modes: no straw returning (NSR), only wheat straw returning (WR), and both wheat and maize straw returning (WR-MR). SOC concentration and storage were higher for WR and WR-MR than for NSR in the 0–20 cm soil layer, respectively (p < 0.05). Although WR and WR-MR resulted in higher mineralization per unit of soil than NSR, no significant difference in mineralization per unit of soil carbon was observed among straw returning modes in the upper soil layer. The mean weight diameters of aggregates at 0–5 cm were higher under treatments with crop retention than under NSR. At this soil depth, the aggregate-associated C concentration and stock for each soil size were significantly decreased by NSR. These findings suggest that WR-MR and WR are effective residue management practices. In particular, WR is the optimal strategy to enhance SOC sequestration, considering other applications of straw (e.g., forage, fuel, or biomass).

show abstract

Section: Soil Aggregatesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of Straw Return Mode on Soil Aggregates and Associated Carbon in the North China Plain

Kan

et al. 2020

Agronomy

View full text Add to dashboard Cite

show abstract

“…There are fewer large-sized aggregates present in rice soil than dryland due to long-term flooding and anaerobic conditions that cause the macroaggregates to be dispersed [36,38]. In addition, alternation between dry and wet conditions generally destroys macroaggregates and enhances the decomposition of organic carbon in paddy soils [39]. Therefore, we suspected that the content of P coll in the macroaggregates of paddy soils was less than dryland soils, mainly existing in microaggregates and small particles, with a higher loss potential.…”

Section: Introductionmentioning

confidence: 99%

Enhanced soil aggregate stability limits colloidal phosphorus loss potentials in agricultural systems

Jin

et al. 2020

Environ Sci Eur

View full text Add to dashboard Cite

Background: Colloid-facilitated phosphorus (P) transport is recognized as an important pathway for the loss of soil P in agricultural systems; however, information regarding soil aggregate-associated colloidal P (P coll ) is lacking. To elucidate the effects of aggregate size on the potential loss of P coll in agricultural systems, soils (0-20 cm depth) from six land-use types were sampled in the Zhejiang Province in the Yangtze River Delta region, China. The aggregate size fractions (2-8 mm, 0.26-2 mm, 0.053-0.26 mm and < 0.053 mm) were separated using the wet sieving method. Colloidal P and other soil parameters in aggregates were analyzed. Results:Our study demonstrated that 0.26-2 mm small macroaggregates had the highest total P (TP) content. In acidic soils, the highest P coll content was observed in the 0.26-to 2-mm-sized aggregates, while the lowest was reported in the < 0.053 mm (silt + clay)-sized particles, the opposite of that revealed in alkaline and neutral soils. Paddy soils contained less P coll than other land-use types. The proportion of P coll in total dissolved P (TDP) was dominated by < 0.053 mm (silt + clay)-sized particles. Aggregate size strongly influenced the loss potential of P coll in paddy soils, where P coll contributed up to 83% TDP in the silt + clay-sized particles. The P coll content was positively correlated with TP, Al, Fe, and the mean weight diameter. Aggregate-associated total carbon (TC), total nitrogen (TN), C/P, and C/N had significant negative effects on the contribution of P coll to potential soil P loss. The P coll content of the aggregates was controlled by the aggregate-associated TP and Al content, as well as the soil pH value. The potential loss of P coll from aggregates was controlled by its organic matter content. Conclusion:We concluded that management practices that increase soil aggregate stability or its organic carbon content will limit P coll loss in agricultural systems.

show abstract

Section: Introductionmentioning

confidence: 99%

Enhanced soil aggregate stability limits colloidal phosphorus loss potentials in agricultural systems

Jin

et al. 2020

Preprint

View full text Add to dashboard Cite

Background: Colloid-facilitated phosphorus (P) transport is recognized as an important pathway for the loss of soil P in agricultural systems; however, information regarding soil aggregate-associated colloidal P (Pcoll) is lacking. To elucidate the effects of aggregate size on the potential loss of Pcoll in agricultural systems, soils (0–20 cm depth) from six land-use types were sampled in the Zhejiang province in the Yangtze River Delta region, China. The aggregate size fractions (2–8 mm, 0.26–2 mm, 0.053–0.26 mm and <0.053 mm) were separated using the wet sieving method. Colloidal P and other soil parameters in aggregates were analyzed. Results: Our study demonstrated that 0.26–2 mm small macroaggregates had the highest total P (TP) content. In acidic soils, the highest Pcoll content was observed in the 0.26–2 mm sized aggregate, while the lowest was reported in the <0.053 mm (silt+clay)-sized particles, the opposite of that revealed in alkaline and neutral soils. Paddy soils contained less Pcoll than other land-use types. The proportion of Pcoll in total dissolved P (TDP) was dominated by <0.053 mm (silt+clay)-sized particles. Aggregate size strongly influenced the loss potential of Pcoll in paddy soils, where Pcoll contributed up to 83% TDP in the silt+clay sized particles. The Pcoll content was positively correlated with TP, Al, Fe, and the mean weight diameter. Aggregate-associated total carbon (TC), total nitrogen (TN), C/P, and C/N had significant negative effects on the contribution of Pcoll to potential soil P loss. The Pcoll content of the aggregates was controlled by the aggregate-associated TP and Al content, as well as the soil pH value. The potential loss of Pcoll from aggregates was controlled by its organic matter content. Conclusion: We concluded that management practices that increase soil aggregate stability or its organic carbon content will limit Pcoll loss in agricultural systems.

show abstract

Effects of tillage and residue management on soil aggregates and associated carbon storage in a double paddy cropping system

Cited by 113 publications

References 60 publications

Effects of Straw Return Mode on Soil Aggregates and Associated Carbon in the North China Plain

Effects of Straw Return Mode on Soil Aggregates and Associated Carbon in the North China Plain

Enhanced soil aggregate stability limits colloidal phosphorus loss potentials in agricultural systems

Enhanced soil aggregate stability limits colloidal phosphorus loss potentials in agricultural systems

Contact Info

Product

Resources

About