Effects of organic carbon and iron oxides on soil aggregate stability under different tillage systems in a rice–rape cropping system

Xue, Bin; Li, Huang; Huang, Yi; Yin, Zhiyao; Li, Xiaokun; Lü, Jianwei

doi:10.1016/j.catena.2019.01.035

Cited by 96 publications

(43 citation statements)

References 59 publications

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“…Most previous reports have shown that straw incorporation increased grain yield [43][44][45], while other studies reported the negative impacts of straw returning on rice yield [30,46]. The results of this paper displayed that the variation of rice yield was affected by the amount and the method of oilseed rape straw returning.…”

Section: Impacts Of Straw Returning On Tiller Growth and Yield Of Hybmentioning

confidence: 50%

“…As time went by, due to the flooding ending and the slow process of straw decomposition, the oxygen content and the oxidation-reduction potential of the soil increased, which make a better environment for root growth [27][28][29][30]. The results of this research showed that after 56-75 days of rice transplanting, root length of straw mulching treatments (MU 1 , MU 2 and MU 3 ) were not increased significantly in comparison to no straw-returning treatment (MU 0 ), while root lengths of the plowing treatments (PL 1 , PL 2 , and PL 3 ) were significantly higher than no straw-returning treatment (PL 0 ).…”

Section: Impacts Of Straw Returning On Root Growthmentioning

confidence: 99%

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Negative and Positive Impacts of Rape Straw Returning on the Roots Growth of Hybrid Rice in the Sichuan Basin Area

et al. 2019

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Incorporating oilseed-rape straw in soil is one of the effective methods for enhancing the use efficiency of agricultural resources in the rape-rice rotation system. However, the impacts of oilseed-rape straw incorporation on root growth and dynamic changes in soil are still unclear. In order to provide a deeper understanding of the oilseed rape straw return on rice growth and productivity, the experiment was conducted in the field and in a specially-designed pots system from 2016 to 2017 by means of two straw returning methods and four straw returning amounts. In the early stage of rice growth (0–36 days after rice transplanting) the straw returning treatments decreased 1.0–8.6 mg/plant in bleeding density and 0.10–6.11, 0.06–0.31, and 0.52–0.84 μmol/(g h) in the activity of glutamine synthetase (GS), glutamic-oxalacetic transaminase (GOT), and glutamic-pyruvic transaminase (GPT), respectively. Oilseed rape straw returned by mulching induced negative impacts on new germinating roots in 0–10 cm of soil, while the negative impacts were observed on roots in 10–30 cm of soil for straw returned by plowing. In the later stage of rice growth (56–75 days after rice transplanting), oilseed rape straw returning produced some positive impacts on rice roots, which enhanced the yield of rice. Conclusively, our findings suggested that dynamic root growth and the activity of root enzymes are two major factors behind the slow reviving of rice after transplanting in the straw returning field. Plowing is a more appropriate method of straw returning than mulching in the rape-rice rotation system in the Sichuan basin area, with a straw incorporation rate of 3.0 t/hm2.

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Section: Impacts Of Straw Returning On Tiller Growth and Yield Of Hybmentioning

confidence: 50%

Section: Impacts Of Straw Returning On Root Growthmentioning

confidence: 99%

Negative and Positive Impacts of Rape Straw Returning on the Roots Growth of Hybrid Rice in the Sichuan Basin Area

et al. 2019

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“…Soil aggregates in paddy soils were close relative to soil tillage, fertilizer regimes, and crop residues, and so on (Sithole, Magwaza, & Thibaud, ; Xue et al., ). Previous studies showed that the SOC content in surface soil decreased, and SOC decomposition and soil erosion loss at surface soil were enhanced by tillage practices (Blanco‐Canqui et al., ; Six, Elliott, & Paustian, ).…”

Section: Introductionmentioning

confidence: 99%

Impact of tillage practices on soil aggregation and humic substances under double‐cropping paddy field

Tang

Xiao

et al. 2020

Agronomy Journal

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The effects of different tillage practices on soil organic carbon (SOC), soil aggregation, soil fulvic acid (C‐FAF), soil humic acid (C‐HAF), and soil humin (C‐HUM) contents at 0–5, 5–10, and 10–20 cm layers under double‐cropping rice (Oryza sativa L.) fields in southern China were explored. The experiment included four tillage treatments: conventional tillage and crop residues incorporation (CT), rotary tillage and crop residues incorporation (RT), no‐tillage and crop residues incorporation (NT), and rotary tillage without crop residues as a control (RTO). The results showed that SOC content under RT and CT treatments were significantly higher than that of RTO treatment. The percentage of soil aggregates of <0.001 mm, 0.005–0.001 mm, and 0.01–0.005 mm at 0–5, 5–10, and 10–20 cm layers under CT treatment were significantly higher than that of RTO treatment. The C‐HUM, C‐FAF, and C‐HAF contents were increased by combined application of tillage with crop residues practices. The results showed that C‐HUM, C‐FAF, and C‐HAF contents under CT and RT treatments were significantly higher than those under the RTO treatment at 0–5, 5–10, and 10–20 cm layers. As a result, it is an appropriate soil practice for increasing SOC content, soil aggregation, and humic substances under double‐cropping rice fields in southern China under conventional tillage and rotary tillage.

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“…The formation of water-resistant aggregates is explained by the action of humic substances released into the soil during sugars breakdown. Carbohydrates can form complex sols with aluminum and iron hydroxides [11]. Under the organic colloids' protection, sesquioxides and clay particles acquire the ability to move in the soil profile.…”

Section: Materials and Research Methodsmentioning

confidence: 99%

“…Numerous studies have found that the introduction of polysaccharides of various nature into the soil positively affects the soil structure formation [10][11]. The direct correlation between the carbohydrate content and the degree of aggregation of soil particles has been repeatedly proved [12], while the remove of organic substances from the soil by chemical means negatively affects the quality of the soil aggregate state [13][14].…”

Section: Introductionmentioning

confidence: 99%

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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Effects of organic carbon and iron oxides on soil aggregate stability under different tillage systems in a rice–rape cropping system

Cited by 96 publications

References 59 publications

Negative and Positive Impacts of Rape Straw Returning on the Roots Growth of Hybrid Rice in the Sichuan Basin Area

Negative and Positive Impacts of Rape Straw Returning on the Roots Growth of Hybrid Rice in the Sichuan Basin Area

Impact of tillage practices on soil aggregation and humic substances under double‐cropping paddy field

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

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