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

Zheng, Shuang; Dou, Sen; Duan, Hongmei; Zhang, Boyan; Bai, Yue

doi:10.1155/2021/9940116

Cited by 9 publications

(6 citation statements)

References 33 publications

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“…Similar results were also reported in some previous studies [21][22][23][24][25]. In contrast, some other studies found that straw mulching did not significantly influence SOC [26][27][28][29] and total N [30] contents in the 20-40 cm soil depth. These conflicting outcomes may be attributed to the influences of many factors, including climate conditions, soil properties, and straw returning years.…”

Section: Soc and Nutrient Contentssupporting

confidence: 91%

The Relationship of Soil Organic Carbon and Nutrient Contents to Maize Yield as Affected by Maize Straw Return Modes

Wang,

Liang,

Liu

et al. 2023

Applied Sciences

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Returning crop residues to the field after harvesting is a proven effective strategy for improving soil fertility, carbon sequestration, and crop productivity. However, the relationships between crop residue return modes, SOC and nutrient contents, and crop yields are still unclear. In this study, a field trial was conducted to investigate the effects of different maize straw return modes, i.e., straw mulching (SMU), straw deep ploughing (SDP), and control without straw return (CK), on soil organic carbon (SOC) and nutrient contents in soil layers of 0–40 cm in a Mollisol. The relationships between straw return modes, SOC and nutrient contents, and maize yield were evaluated. Compared with CK, SMU and SDP significantly increased SOC, total nitrogen (N), available N, total phosphorus (P), and available P contents in all soil layers. Relative to SMU, SOC, total N, available N, total P, and available P contents were significantly lower in soil layers of 0–10 cm, but they were significantly higher in soil layers of 20–40 cm in SDP. Redundancy analysis indicated that total N, available N, and SOC were major factors controlling maize yield. Structural equation modeling further showed that straw return modes indirectly affected maize yield by directly and preferentially affecting total N and available N contents. The results indicated that SMU and SDP were beneficial for increasing SOC and nutrient contents at the surface and subsurface soils, respectively. Optimizing a nitrogen management strategy is important to achieve high maize yield with straw return.

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Section: Soc and Nutrient Contentssupporting

confidence: 91%

The Relationship of Soil Organic Carbon and Nutrient Contents to Maize Yield as Affected by Maize Straw Return Modes

Wang,

Liang,

Liu

et al. 2023

Applied Sciences

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“…However, they were obviously increased in the following years, which was mainly attributed to the build‐up of a loosened plough layer (0–20 cm) and a fertile subsurface soil layer (20–40 cm) under CSDI. This result is similar to that reported by Zheng et al (2021). The CSDI mode essentially combines straw burial with deep tillage.…”

Section: Discussionsupporting

confidence: 93%

“…Straw incorporation has been demonstrated to promote the activities of microorganisms and soil enzymes (Yang et al, 2016; Zhao et al, 2016), decrease soil bulk density (Wei et al, 2006), increase soil porosity (Ning et al, 2009) and soil moisture conservation capacity (Wei et al, 2006) and increase soil aggregates and humus accumulation (Zhang, Wei, et al, 2014; Zheng et al, 2021). Yin et al (2018) estimated that straw incorporation can even replace all the K 2 O, most of the P 2 O 5 and part of chemical nitrogen applied to farms, thus mitigating farmland degradation caused by the overuse of chemical fertilizer.…”

Section: Introductionmentioning

confidence: 99%

“…The physical protection provided by water-stable aggregates is one of the main mechanisms for SOC stability, and SOC associated with soil aggregate has been regarded as an essential indicator for the potential changes of SOM (Kubar et al, 2021) and evaluating C sequestration (Guan et al, 2018). Zheng et al (2021) found that 3 years of CSDI in a field experiment clearly increased the contents of SOC and soil humic acid (HA) in topsoil (0-20 cm) and subsoil (20-40 cm). Their study further showed that CSDI enhanced the percentage of alkyl C and the hydrophobicity of the HA structure, suggesting the positive effects of CSDI mode on SOM both in the topsoil and subsoil.…”

mentioning

confidence: 99%

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Deep incorporation of corn straw benefits soil organic carbon and microbial community composition in a black soil of Northeast China

Zhu

Lin

Guan

et al. 2022

Soil Use and Management

Self Cite

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‘Deep incorporation of corn straw’ (CSDI) is to concentrate the burial of corn straw into the subsurface soil layer (20–40 cm) and to break the plough pan, thereby creating a loosened plough layer (0–20 cm) and a fertile subsurface soil layer. However, its impacts on soil organic carbon (SOC) and the microbial community remain poorly understood. A field experiment was conducted to investigate the effects of 1‐year CSDI (CD1), 3‐year CSDI (CD3) and 5‐year CSDI (CD5) on soil aggregates and aggregate‐associated SOC, as well as bacterial and fungal community characteristics (examined by the high‐throughput gene sequencing method). The results demonstrated that SOC and soil fungal diversity were decreased by CD1, but increased by CD3 and CD5. Compared with the control, CD5 promoted 2–0.25 mm soil macroaggregation, significantly increased SOC by 8.94% and aggregate‐associated SOC by 5.96%–8.84%, consequently improving the physical protection of SOC by soil aggregates. CD3 and CD5 enhanced the richness and diversity of soil bacteria and fungi, and altered community composition. For soil bacteria, the relative abundance of Acidobacteria and Chloroflexi was increased, while that of Firmicutes, Gemmatimonadetes, Sphingomonas and Bacillus was decreased. For soil fungi, the relative abundance of Ascomycota, Zygomycota, Mortierella and Fusarium was greatly improved, but that of Basidiomycota was reduced. These obvious variations in microbial community structure were beneficial to straw degradation and SOC accumulation. Overall, the optimization of microbial community with CSDI plays a positive role in promoting soil organic matter, nutrient cycling and carbon sequestration, and thus improving soil fertility.

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“…Meanwhile, soil C and N to straw deep returning varied widely at different soil depths (Dikgwatlhe et al, 2014). Straw deep returning (20-40 cm) increased SOC content by 8% in topsoil (0-20 cm), and up to 27% in the subsoil (20-40 cm) in the third year (Zheng et al, 2021). These resulted in different soil stratification ratios, a soil quality indicator of nutrient distribution in soil profile (Melero et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Optimized straw interlayer improves organic carbon and total nitrogen in soil profile: A four-year experiment in a saline soil

Chang

Wang

Song

et al. 2022

Preprint

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Soil salinization is a critical environmental issue restricting agricultural production. Straw deep returning as interlayer (40 cm) has been a popularized practice to alleviate salt stress. However, the legacy effects of straw interlayer associated with the straw input amount on soil organic carbon (SOC) and total nitrogen (TN) in saline soil remain unclear. Therefore, a four-year (2015-2018) field experiment was conducted with four levels (i.e., 0, 6, 12 and 18 Mg ha ) of straw returning as interlayer. Compared with no straw interlayer (CK), straw interlayers increased SOC content by 14-32% and 11-57% in 20-40 cm and 40-60 cm, respectively. Lower increases were for soil TN content (8-22% in 20-40 cm and 6-34% in 40-60 cm) than SOC content, which led to increase soil C:N ratio in the 20-60 cm soil depth. Compared with CK, remarkable increases of SOC and soil TN contents in 20-60 cm led to the decrease of stratification ratios (0-20: 20-60 cm), which promoted uniform distributions of SOC and TN in soil profiles. Even though soil parameters ranged widely according to the straw input, straw interlayer with 12 Mg ha had higher SOC, TN, C:N ratio, and lower soil stratification ratio in 2015-2017, which contributed to salt leaching, water retention, and yield increment. These results highlighted the legacy effects of straw interlayers maintained more than four years, which led to an underestimation for previous short-term experiments, and demonstrated a great potential for subsoil fertility and salt-affected soil amelioration.

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

Cited by 9 publications

References 33 publications

The Relationship of Soil Organic Carbon and Nutrient Contents to Maize Yield as Affected by Maize Straw Return Modes

The Relationship of Soil Organic Carbon and Nutrient Contents to Maize Yield as Affected by Maize Straw Return Modes

Deep incorporation of corn straw benefits soil organic carbon and microbial community composition in a black soil of Northeast China

Optimized straw interlayer improves organic carbon and total nitrogen in soil profile: A four-year experiment in a saline soil

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