Soil wet aggregate distribution and pore size distribution under different tillage systems after 16 years in the Loess Plateau of China

Gao, Lili; Wang, Bisheng; Li, Schengping; Wu, Huijun; Wu, Xueping; Liang, Guopeng; Gong, Daozhi; Zhang, Ximei; Dan, Cai; Degré, A.

doi:10.1016/j.catena.2018.09.043

Cited by 94 publications

(48 citation statements)

References 76 publications

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“…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].…”

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

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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).

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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

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“…Soil loss at CC-NT and CC-SS did not statistically differ. Minimizing tillage can improve soil physical properties, particularly by reducing soil bulk density, indirectly improving water infiltration [34], and reducing soil erosion. In addition, crop residue increases SIR [24], becoming key in the crop growth stages [27].…”

Section: Discussionmentioning

confidence: 99%

Effects of Long-Term Crop-Livestock-Forestry Systems on Soil Erosion and Water Infiltration in a Brazilian Cerrado Site

et al. 2019

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Integrating agricultural land uses is a suitable alternative for fostering economic development and improving food security. However, the effects of long-term integrated systems on soil erosion and water infiltration are still poorly understood. Here, we investigate the influence of different agricultural land uses on soil erosion and water infiltration in an Oxisol site located in the Brazilian Cerrado region. The experimental area consisted of continuous grazing under variable stocking rates with regular fertilization (CG-RF), continuous cropping under no-till (CC-NT) and no-till with 4-year subsoiling (CC-SS), rotation of one year cropping and three years livestock in the livestock phase (C1-L3), rotation of four years cropping and four years livestock in the cropping phase (CL-4C) and in the livestock phase (CL-4L), and integrated crop-livestock-forestry in the cropping phase (CLF-C) and in the livestock phase (CLF-L). To evaluate water infiltration and soil loss, we used a rainfall simulator with a constant rainfall intensity of 74.9 ± 3.6 mm h−1 in plots of 0.7 m2. We carried out 72 rainfall simulations comprising four repetitions in each treatment under vegetation and bare soil. Stable infiltration rate (SIR) ranged from 45.9 to 74.8 mm h−1 and 19.4 to 70.8 mm h−1 under vegetation covers and bare soil, respectively. Our findings indicated that SIR values under CLF-C were 60% greater than under CG-RF. We also found that soil loss rates under CLF-C were 50% smaller than under CG-RF. The crop–livestock rotation period that presented better results of SIR and soil loss was one year of cropping and three years of livestock (C1-L3). Overall, we noted that SIR and soil loss values under CLF-C are similar to the Cerrado native vegetation. Therefore, our study reveals the opportunity to increase agricultural production, improve food supply, and reduce soil erosion with adequate soil and agricultural management.

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“…However, in all cases, differences with the background are not significant (SSD 0.05 = 2.12). Probably, the leveling effect of mechanical processing by agricultural implements, the same in all cases, affected [16].…”

Section: Materials and Research Methodsmentioning

confidence: 96%

Influence of humic preparations on the content of carbohydrates in structural units and their water resistance

Lykhman¹,

Klimenko²,

Dubinina³

et al. 2020

E3S Web Conf.

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The effect of the combined use of humic preparations and pesticides in various dosages on the quantitative composition of carbohydrates in agronomically valuable soil aggregates was studied. Biologically active humic substances indirectly, through plants and microorganisms, intensify the release of sugars, which play an essential role in the initial stages of the soil aggregates formation. Pesticides have a depressing effect on the soil microflora development, which, in turn, is one of the factors of the agronomically valuable soil structure formation. The introduction of humic preparations reduces the toxic effect of pesticides and reduces seasonal deterioration in the structural state of the soil. It has been shown that the distribution of aggregates according to variants, both in the case of dry sieving and in the case of wet sieving, correlates with the dynamics of the carbohydrate content in soil particles. This tendency is especially perceptible in the variants where pesticides were introduced into the soil together with the humic preparation. The correlation between the distribution of soil aggregates and carbohydrates according to Chaddock’s scale is salient (r = 0.532). The introduction of humic preparations makes it possible to reduce the loss of the agronomically valuable structure even in aftereffect.

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Soil wet aggregate distribution and pore size distribution under different tillage systems after 16 years in the Loess Plateau of China

Cited by 94 publications

References 76 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

Effects of Long-Term Crop-Livestock-Forestry Systems on Soil Erosion and Water Infiltration in a Brazilian Cerrado Site

Influence of humic preparations on the content of carbohydrates in structural units and their water resistance

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Soil wet aggregate distribution and pore size distribution under different tillage systems after 16 years in the Loess Plateau of China

Cited by 94 publications

References 76 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

Effects of Long-Term Crop-Livestock-Forestry Systems on Soil Erosion and Water Infiltration in a Brazilian Cerrado Site

Influence of humic preparations on the content of carbohydrates in structural units and their water resistance

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Soil wet aggregate distribution and pore size distribution under different tillage systems after 16 years in the Loess Plateau of China