Decomposition characteristics of rice straw returned to the soil in northeast China

Yan, Chao; Shen, Yan; Jia, Tian-Yu; Dong, Shoukun; Ma, Chao; Gong, Zhenping

doi:10.1007/s10705-019-09999-8

Cited by 86 publications

(55 citation statements)

References 35 publications

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“…Numerous studies have shown that returning crop straws, such as corn straws, to the field can affect the content and structure of humic acid in the soil [13,14]. In China, the main ways of returning straw include applying it as mulch, plowing the straw into the soil, and burying the straws deep into the soil [15]. However, these modes of returning straw are not effective in paddy fields since the straw can easily float when applied as mulch.…”

Section: Introductionmentioning

confidence: 99%

Effects of Returning Granular Corn Straw on Soil Humus Composition and Humic Acid Structure Characteristics in Saline-Alkali Soil

Chen

Opoku-Kwanowaa

2020

Sustainability

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Returning straw plays an important role in protecting the environment and maintaining the sustainable development of agriculture. In this research, we explored the effects of returning granular corn straw on soil humus composition and humic acid structural characteristics in a typical saline-alkali soil. This study was conducted in Jilin province. A randomized block design consisting of nine plots with three treatments in three replicates was used for this study. The treatments were granular corn straw (GS), coarse corn straw (CS), and control (CK). The results show that treatments GS and CS both increased the contents of soil humus and its components in the soil compared to CK. However, treatment GS recorded the highest significant increase in soil humus carbon (HEC), fulvic acid carbon (FAC), and humic acid carbon (HAC) by 17.59%, 8.32%, and 26.51%, respectively. Comparing the two straw treatments, it was found that the relative intensities of treatment GS at 2920 and 2850 cm−1 were higher than treatment CS by 1.58% and 72.49%, respectively. The relative intensities of treatment GS at 1720 cm−1 and 1620 cm −1 were lower than treatment CS by 52.2% and 30.43%, respectively. Moreover, an analysis of soil humic acid (HA) through an infrared spectrum, fluorescence spectrum, and principal components analysis (PCA) showed that the application of straw makes the structure of HA aliphatic, simple, and younger, and also promotes the continuous renewal of humus. In this study, the application of granular corn straw effectively improved the soil humus content and humic acid structural characteristics and is thus highly recommended.

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Section: Introductionmentioning

confidence: 99%

Effects of Returning Granular Corn Straw on Soil Humus Composition and Humic Acid Structure Characteristics in Saline-Alkali Soil

Chen

Opoku-Kwanowaa

2020

Sustainability

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“…A plethora of research has been found in the literature about straw decomposition, concluding that the degradation process of straw happens slowly in the open environment compared with greenhouse experiments due to different atmosphere, rainfall, and soil physicochemical properties, as well as tillage and microorganisms in the soil [5]. Yan explored the decomposition characteristics of rice straw in Northeast China and found that P and K showed better performance at the initial stage, while N and OC showed better effects in the middle to end stage [6]. Nakajima et al [7] considered CO 2 release and soil organic matter improvement as parameters and found that higher temperature and moisture could accelerate the degradation process of straw at the studied farm.…”

Section: Introductionmentioning

confidence: 99%

“…Total organic carbon (TOC) in straw was measured both by oxidation with potassium dichromate and by titration with ferrous ammonium sulfate. Nutrients, including N, P, and K, were first measured by digestion with H 2 SO 4 -H 2 O 2 , and then total nitrogen (TN), total phosphorus (TP), and total potassium (TK) were measured by the Kjeldahl method, the Mo-Sb Anti-spectralphotometer method, and the flame photometry method, respectively [6]. Except for C (measured twice), these indexes were measured three times for one sample, and average values were calculated.…”

mentioning

confidence: 99%

“…where RR is the release rate of nutrients or components in wheat straw (%), m 0 is the initial content of nutrients or components in wheat straw, m n is the n th sample content of nutrients or components in wheat straw, n is the n th collected sample. C:N is the ratio of the straw residual TOC to TN [6]. Additionally, Abbreviation of parameters has been further depicted in Appendix A.…”

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confidence: 99%

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Nutrient Recycling, Wheat Straw Decomposition, and the Potential Effect of Straw Shear Strength on Soil Mechanical Properties

et al. 2020

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This study aimed to explore the release rate (RR) of wheat straw nutrients during straw return to a paddy field and examined the possible relationship between wheat stalk shear strength and the content of the remaining components in wheat straw. We used the nylon mesh bag technique to study the decomposition of straw nutrients such as total organic carbon (TOC), total nitrogen (TN), total phosphorus (TP), total potassium (TK), lignin, and cellulose over time. During the time span of 0–90 days, results showed a rapid decomposition rate with a diverse trend under different tillage operations. Furthermore, the decomposition rate was higher under the plough (PRP) conditions than under dry conditions (RP) or water rotation (PR). Moreover, under PRP conditions, the RR of TOC, TK, lignin, and cellulose increased, while the RR of TK was higher than 95% initially and then increased slightly. However, the carbon to nitrogen ratio was first increased and then decreased; similarly the RR of TP first increased and then decreased; a fluctuating pattern was observed for TN. Additionally, we found a strong correlation between wheat stalk shear strength and the remaining contents of lignin, hemicellulose, and cellulose, with R2 ≥ 0.91, which was higher than 0.82 after computing adjustments. Furthermore, the changing trend of nutrients and components and the relationship between shear strength and the content of the remaining components in wheat straw were used to evaluate the release characteristics of nutrients under straw return. The potential effects of the straw shear strength on soil mechanical properties were determined, providing a remarkable opportunity for acquiring nutrients for sustainable application of soil.

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“…Solid line shows the linear relationship between partial residuals and the given explanatory variable, and dashed lines are the 95% confidence interval. Pearson's correlation coefficient is also shown Scharpenseel 1987;Cai et al 2018;Yan et al 2019). Thus, one year after adding the straw into the soil, the intermediate and recalcitrant carbon-derived straw pools may persist as components of the soil organic matter (SOM) matrix (Cai et al 2018), and the intermediate carbon pool might then account for the largest and most available carbon source for methanogenesis, representing the dominant mechanism of CH 4 production.…”

Section: Main Drivers Of Ch 4 Emissions During the Flooded Fallow Seasonmentioning

confidence: 96%

The main drivers of methane emissions differ in the growing and flooded fallow seasons in Mediterranean rice fields

Martínez-Eixarch¹,

Alcaraz²,

Viñas

et al. 2021

Plant Soil

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Purpose To assess 1) the cumulative greenhouse gas emissions –GHG- and global warming potential (methane – CH4- and nitrous oxide) from rice fields in the growing and fallow seasons, and 2) the environmental and agronomic drivers of CH4 emissions, and their relative capacity to explain CH4 variation. Methods A two-year multisite field experiment covering the agronomic and environmental variability of a rice growing area in NE Iberian Peninsula was conducted with monthly samplings of GHG and monitoring of both environmental and agronomic factors. Information-theoretic framework analysis was used to assess the relative contribution of the environmental and agronomic variables on methane emissions. Results Two thirds of the CH4 is emitted in the fallow season. Edaphic factors exert more influence during the growing season whereas agronomic factors have a higher impact in the fallow. The implications of these findings on the design of improved mitigation options rice are discussed. Conclusions Soils with higher soil sulphate concentration, bulk density and clay content emit less CH4 in growing season. In the fallow season, the rates of both straw input and nitrogen fertilization stimulate CH4 emissions. Graphical abstract

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Decomposition characteristics of rice straw returned to the soil in northeast China

Cited by 86 publications

References 35 publications

Effects of Returning Granular Corn Straw on Soil Humus Composition and Humic Acid Structure Characteristics in Saline-Alkali Soil

Effects of Returning Granular Corn Straw on Soil Humus Composition and Humic Acid Structure Characteristics in Saline-Alkali Soil

Nutrient Recycling, Wheat Straw Decomposition, and the Potential Effect of Straw Shear Strength on Soil Mechanical Properties

The main drivers of methane emissions differ in the growing and flooded fallow seasons in Mediterranean rice fields

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