Effects of long-term super absorbent polymer and organic manure on soil structure and organic carbon distribution in different soil layers

Yang, Yingshun; Wu, Jicheng; Zhao, Shiwei; Gao, Cuimin; Pan, Xiaoying; Tang, Darrell; Ploeg, Martine van der

doi:10.1016/j.still.2020.104781

Cited by 22 publications

(12 citation statements)

References 58 publications

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“…We found that S, OF and S+OF treatments increased the proportion of >0.5 mm aggregates significantly. Among these, S+OF treatment was most beneficial for increasing the proportion of >0.25 mm aggregates because of the synergistic effects of the combination of S+OF: subsoiling provides loose soil conditions ( Yang et al, 2021b ) and leads to increased water availability in the root zone, which promotes crop root growth and increases soil organic carbon ( Yang et al, 2021b ), while organic fertilizers provide nutrients to the crop and soil microorganisms ( Spedding et al, 2004 ; Wang et al, 2015 ) and thereby promote microbial activity ( Piovanelli et al, 2006 ; Kuzyakov and Xu, 2013 ) and increase soil organic carbon ( Yang et al, 2021a ). These factors in turn increased soil structure stability, increased soil water retention, and improved crop growth.…”

Section: Discussionmentioning

confidence: 99%

Impact of Combining Long-Term Subsoiling and Organic Fertilizer on Soil Microbial Biomass Carbon and Nitrogen, Soil Enzyme Activity, and Water Use of Winter Wheat

Yang

et al. 2022

Front. Plant Sci.

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Reductions in soil productivity and soil water retention capacity, and water scarcity during crop growth, may occur due to long-term suboptimal tillage and fertilization practices. Therefore, the application of appropriate tillage (subsoiling) and fertilization (organic fertilizer) practices is important for improving soil structure, water conservation and soil productivity. We hypothesize that subsoiling tillage combined with organic fertilizer has a better effect than subsoiling or organic fertilizer alone. A field experiment in Henan, China, has been conducted since 2011 to explore the effects of subsoiling and organic fertilizer, in combination, on winter wheat (Triticum aestivum L.) farming. We studied the effects of conventional tillage (CT), subsoiling (S), organic fertilizer (OF), and organic fertilizer combined with subsoiling (S+OF) treatments on dry matter accumulation (DM), water consumption (ET), water use efficiency (WUE) at different growth stages, yield, and water production efficiency (WPE) of winter wheat over 3 years (2016–2017, 2017–2018, 2018–2019). We also analyzed the soil structure, soil organic carbon, soil microbial biomass carbon and nitrogen, and soil enzymes in 2019. The results indicate that compared with CT, the S, OF and S+OF treatments increased the proportion of >0.25 mm aggregates, and S+OF especially led to increased soil organic carbon, soil microbial biomass carbon and nitrogen, soil enzyme activity (sucrase, cellulose, and urease). S+OF treatment was most effective in reducing ET, and increasing DM and WUE during the entire growth period of wheat. S+OF treatment also increased the total dry matter accumulation (Total DM) and total water use efficiency (total WUE) by 18.6–32.0% and 36.6–42.7%, respectively, during these 3 years. Wheat yield and WPE under S+OF treatment increased by 11.6–28.6% and 26.8–43.6%, respectively, in these 3 years. Therefore, S+OF in combination was found to be superior to S or OF alone, which in turn yielded better results than the CT.

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Section: Discussionmentioning

confidence: 99%

Impact of Combining Long-Term Subsoiling and Organic Fertilizer on Soil Microbial Biomass Carbon and Nitrogen, Soil Enzyme Activity, and Water Use of Winter Wheat

Yang

et al. 2022

Front. Plant Sci.

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“…4.1 Effect of different application rates of SAP on soil structure, soil organic carbon, soil microbial biomass carbon and soil enzyme activity SAP acts as a soil amendment, which can improve soil structure, soil pore characteristics (Yang et al, 2011c;Yang et al, 2018) and soil physical properties (Yang et al, 2021;Yang et al, 2022), which in turn increases soil water retention and then facilitates microorganism growth. SAP could be strongly adsorbed to the soil particles, preventing dispersion of them (Ajwa and Trout, 2006).…”

Section: Discussionmentioning

confidence: 99%

Effect of long term application of super absorbent polymer on soil structure, soil enzyme activity, photosynthetic characteristics, water and nitrogen use of winter wheat

Yang

Zhang²,

Wu³

et al. 2022

Front. Plant Sci.

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IntroductionWater scarcity and seasonal drought are major constraints on agricultural development globally. Super absorbent polymer (SAP) is a good amendment that can improve soil structure, increase soil water retention, and promote crop growth even with less soil moisture. We hypothesize that long term application of SAP has a better effect on soil organic carbon, soil enzyme activity, photosynthetic characteristics, yield, and water and nitrogen use than short term application. MethodsA long term field experiment with different application rates (0 (CK), 15 (L), 30 (M), 45 (H) kg ha-1) of SAP was conducted at the Yuzhou water conservation agriculture base of the Henan Academy of Agricultural Sciences from 2011 to 2019.Results and DiscussionThe results indicate that applying SAP increases > 0.25 mm aggregates and decreased<0.25 mm aggregates in the soil after one year (2011) and 9 years (2019) of application. In addition, soil organic carbon, soil microbial biomass carbon, soil sucrase and cellulase activities, soil water consumption, water consumption, net photosynthetic rate (Pn), leaf water use efficiency (LWUE) of wheat and yield, all increased after SAP application. SAP also boosts water use efficiency and nitrogen use efficiency. Correlation analyses show that SAP promotes the growth of wheat, and improves the utilization rate of soil water and nutrients by improving the soil structure and increasing soil organic carbon and microbial enzyme activity.ConclusionBased on our research, SAP treatment at a dosage of 45 kg ha-1 is most effective and is thus recommended.

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“…It is soluble in neither inorganic nor organic solvents and has a speci c crosslinking degree (CD) and network structure [2]. SARs have a good adsorption performance, water retention capacity, pressure resistance, and heat resistance and have been used widely used in agriculture, forestry, and horticulture [3,4], industry [5][6][7], health supplies [8], and other elds [9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of a Novel Bentonite Composite Superabsorbent Resin Based on Starch

Guo

Wang

et al. 2022

Advances in Materials Science and Engineering

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A superabsorbent resin (SAR) is a functional polymer with a high water absorption capacity, which has been widely used in many fields. In this study, a modified aqueous solution polymerization process was adopted to synthesize a SAR. The optimum synthetical mass ratios of starch, bentonite, potassium persulfate (K2S2O8), and N,N′-methylene-bis-acrylamide to acrylic acid (AA) were 7.14%, 3.57%, 0.29%, and 0.057%, respectively, and the neutralization degree of AA was 50%. The molecular structure and the surface morphologies of the SAR were confirmed using Fourier transform infrared spectroscopy and scanning electron microscopy. The SAR had a water absorbency of 1300 mL/g in distilled water and 56 mL/g in 0.9 wt.% NaCl solution. The water absorption rate reached 72.65% of the maximum water absorption in 1 hour and swelled to equilibrium in 4 hours. The water retention rate was 45.86% after heating and evaporation at 150°C for 1 hour. The moisture absorption rate reached 28.2% after 10 days of placement. The modified technology provides a new synthetic method for production of SARs, which is characterized by a lack of nitrogen protection, the direct use of raw AA and potato starch, a simplified synthesis process, substantially improved efficiency, and lower production costs.

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Effects of long-term super absorbent polymer and organic manure on soil structure and organic carbon distribution in different soil layers

Cited by 22 publications

References 58 publications

Impact of Combining Long-Term Subsoiling and Organic Fertilizer on Soil Microbial Biomass Carbon and Nitrogen, Soil Enzyme Activity, and Water Use of Winter Wheat

Impact of Combining Long-Term Subsoiling and Organic Fertilizer on Soil Microbial Biomass Carbon and Nitrogen, Soil Enzyme Activity, and Water Use of Winter Wheat

Effect of long term application of super absorbent polymer on soil structure, soil enzyme activity, photosynthetic characteristics, water and nitrogen use of winter wheat

Synthesis and Characterization of a Novel Bentonite Composite Superabsorbent Resin Based on Starch

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