2020
DOI: 10.1002/agj2.20051
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Impact of tillage practices on soil aggregation and humic substances under double‐cropping paddy field

Abstract: 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 t… Show more

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Cited by 12 publications
(10 citation statements)
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“…It is widely established that intensive tillage destroys stable aggregates and greatly affects the larger soil aggregates, which are considered less stable [57][58][59]. In line with [60], our results showed that, in the long-term, the stability reduction occurred not in the surface layers but also in deeper ones, although in smaller proportions.…”
Section: Stability Of Water Stable Aggregatessupporting
confidence: 83%
“…It is widely established that intensive tillage destroys stable aggregates and greatly affects the larger soil aggregates, which are considered less stable [57][58][59]. In line with [60], our results showed that, in the long-term, the stability reduction occurred not in the surface layers but also in deeper ones, although in smaller proportions.…”
Section: Stability Of Water Stable Aggregatessupporting
confidence: 83%
“…The inundation of rice fields makes the soil aggregate characteristics of rice fields different from those of dry land. The findings of H. Tang et al (2020) show that soil and land processing factors greatly influence soil aggregates in rice fields. Soil health research has developed various methods such as assessment using VSA (Visual Soil Assessment) and vertical soil physical health assessment methods using VNIR, ECa data, and penetration resistance sensors.…”
Section: Introductionmentioning
confidence: 97%
“…Fertile soil contains at least 5% organic humus material, which is recognizable by its dark color [23]. The important role of humus is to control the ecological and environmental functions of the soil, which contributes to the biological, chemical, and physical properties of the soil and soil fertility, as it can store water and nutrients available to plants and release the energy needed [23][24][25]. Natural humus consists of specific humin substances with amorphous structural properties, dark brown to black color, polydispersity, high molecular weight in the range of 20,000-300,000 g mol −1 , and high thermodynamic stability.…”
Section: ■ Introductionmentioning
confidence: 99%
“…Humin is a component closely related to inorganic colloids in soil [29]. Humin, by definition, is a term used to distinguish it from other fractions in humus, it has no clear chemical structure, and is a constituent of soil organic matter that is insoluble in acidic or base solutions [25,[29][30]. Humin consists of a complex and heterogeneous mixture of organic components that form an amorphous compound with a molecular weight of 20,000 to 300,000 g mol −1 and consists of 80 to 90% soil organic carbon.…”
Section: ■ Introductionmentioning
confidence: 99%