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

Ma, Shoutian; Kan, Zheng‐Rong; Qi, Jianying; Zhang, Hailin

doi:10.3390/agronomy10010061

Cited by 21 publications

(24 citation statements)

References 40 publications

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“…Straw contains carbon, nitrogen, phosphorus, potassium, other nutrients [ 31 ] and a certain number of humus fractions [ 1 ]. Therefore, its application increases the content of humus C through stem and root exudates [ 32 ], which reduces the direct mineralization of soil organic carbon content. Lhadi et al reported that the degradation of corn straw leads to the formation of humus [ 33 ].…”

Section: Discussionmentioning

confidence: 99%

Fluorescence Spectroscopy and 13C NMR Spectroscopy Characteristics of HA in Black Soil at Different Corn Straw Returning Modes

Zheng

Dou

Duan

et al. 2021

International Journal of Analytical Chemistry

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A three-year field experiment was conducted to analyze the effects of straw enrichment and deep incorporation on the humus composition and the structure of humic acid (HA) in black soil. The differences in the HA structure between different straw returning methods were detected by three-dimensional fluorescence spectroscopy and 13C NMR technology. The purpose of this paper is to provide a theoretical basis and data support for improving the straw returning system. Four different treatments, including no straw applied (CK), straw mulching (SCR), straw deep ploughing (MBR), and straw enrichment and deep incorporation (SEDI: harvested the corn straw from four rows together with a finger-plate rake and then crushed and buried them in one row in the 20∼40 cm deep level in the subsoil with a wind-driven input cylindrical plough), were used in this study. Our results showed that compared to CK treatment, SEDI significantly increased the contents of organic carbon (SOC), soil humic acid carbon (HAC), fulvic acid carbon (FAC), and humin C content (HM-C) in the subsurface soil layer by 27.47%, 34.33%, 19.66%, and 31.49%, respectively. Among all the straw returning treatments, SEDI treatment had the most significant effect in increasing the contents of HEC, HAC, and FAC. Straw returning not only reduced the degree of condensation and oxidation of the HA structure but also increased the proportion of alkyl C and enhanced the hydrophobicity of the HA structure in subsurface soil. Moreover, SEDI treatment significantly increased the proportion of aliphatic C/aromatic C of the HA structure in subsurface soil and improved the aliphatic property of HA, which had a significant effect on the HA structure compared to other treatments.

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Section: Discussionmentioning

confidence: 99%

Fluorescence Spectroscopy and 13C NMR Spectroscopy Characteristics of HA in Black Soil at Different Corn Straw Returning Modes

Zheng

Dou

Duan

et al. 2021

International Journal of Analytical Chemistry

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“…Previous studies have reported that SR positively improves soil physical and chemical properties (Yan et al 2020). In the long term, SR addition to a field can promote growth of crop roots, reduce evaporation of soil water, improve soil water storage capacity and create suitable water conditions for crop growth, thereby improving yield (Ma et al 2020). Microorganisms can decompose the nutrients stored in stover, increase soil SOC and MBC content, and improve soil physicochemical properties, so addition of SR to a field is a good use of stover.…”

Section: Discussionmentioning

confidence: 99%

“…The high C/N ratio of maize stover affects the transformation of SOC by microorganisms, leading to reduced SOC decomposition. SR can increase soil microbial biomass and activity, thus promoting SOC decomposition and increasing soil SOC content (Fang et al 2018;Ma et al 2020). Moderate N application increases SOC content and eventually increase crop yield (Franzluebbers, 2005;Liu et al 2014;He et al 2015).…”

Section: Discussionmentioning

confidence: 99%

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Stover return and nitrogen application affect soil organic carbon and nitrogen in a double‐season maize field

et al. 2021

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Cultivation techniques have an important influence on grain yield of maize. This experiment investigated the effect of stover return (SR) and different nitrogen (N) application rate on soil organic carbon (SOC) composition, soil nutrient and maize yield.• Different nitrogen application rate 100 (N100), 150 (N150), 200 (N200), 250 (N250) or 300 (N300) kg ha À1 applied to the maize field with stover return and without stover return traditional planting (TP) method.• Nitrogen application rate and stover return affected the SOC, labile organic carbon (LOC), microbial biomass (MBC), NO 3 À -N, NH 4 + -N and maize yield. Soil N, soil carbon content and maize yield of SR were all higher than TP. The SOC content of SR and TP were 9.67 and 9.19 g kg À1 , respectively. Nitrogen application was significantly and positively correlated with soil MBC, LOC, SOC, NO 3 À -N, NH 4 + -N and yield. The maximum values of SOC composition, soil nutrients and maize yield were reached at SR with 250 kg ha À1 .• Stover return with application of N 250 kg ha À1 significantly increased the growth attribute and maize yield in subtropical region compared with traditional planting.

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“…This may be related to wheat and maize straw biomass, thus enhancing labile C in SOC pools [34,38]. Ma et al [39] previously observed a significant correlation between mineralization and SOC concentration. However, the straw residue effect was not significant in our field experiments.…”

Section: Soc Mineralizability Under Different Tillage and Residue-ret...mentioning

confidence: 93%

Effect of Tillage and Residue-Returning Mode on Soil Carbon Mineralizability and Accumulation in a Wheat–Maize System

et al. 2022

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Conservation tillage has been widely adopted to improve soil organic carbon (SOC) accumulation. To assess the effects of different tillage and residue-returning modes on SOC mineralizability and accumulation, a field experiment was conducted in 2015, including two tillage modes, i.e., no-tillage (NT) and rotary-tillage (RT), as well as three straw-returning modes, i.e., no straw returning (N0), wheat straw returning (WR), and wheat–maize straw retuning (WM). Wheat–maize root, maize straw, and wheat straw were added to soil samples during laboratory incubation. The results showed that NT significantly increased SOC concentration by 26.75% at a depth of 0–10 cm (p < 0.01). Although NT significantly decreased SOC mineralizability at soil depths of 0–10 cm and 10–20 cm (p < 0.05), the residue did not significantly affect SOC mineralizability in the 0–20 cm layer. The potentially mineralized C (Cp) and organic labile C fraction (C1) increased with the increase of residue amount. A significant correlation (R2 = 0.662) was observed between C1 and SOC concentration. Notably, SOC concentration and mineralizability without straw returning were insignificant between N0 and WR in the 0–10 cm and 0–20 cm layers, respectively. This suggests that NT with WR is a promising strategy to increase SOC concentration and decrease mineralizability.

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

Cited by 21 publications

References 40 publications

Fluorescence Spectroscopy and 13C NMR Spectroscopy Characteristics of HA in Black Soil at Different Corn Straw Returning Modes

Fluorescence Spectroscopy and 13C NMR Spectroscopy Characteristics of HA in Black Soil at Different Corn Straw Returning Modes

Stover return and nitrogen application affect soil organic carbon and nitrogen in a double‐season maize field

Effect of Tillage and Residue-Returning Mode on Soil Carbon Mineralizability and Accumulation in a Wheat–Maize System

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