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Enhancing soil aggregation and acetamiprid adsorption by ecofriendly polysaccharides hydrogel based on Ca^(2+)-amphiphilic sodium alginate

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Journal of Environmental Sciences 2022年第3期34卷 55-63页

作者： Siqi Zhang Furui He Xiuqin Fang Xinyu Zhao Yuanyuan Liu Gaobo Yu Yang Zhou Yuhong Feng Jiacheng Li Key Laboratory of Advanced Materials of Tropical Island Resources of Ministry of Education and School of Chemical Engineering and Technology Hainan UniversityHainan 570228China

soil aggregation plays an important role in agricultural production ***,the structure of soil aggregation is destroyed by the natural environment and unreasonable farming management,resulting in the loss of water,fertilizers and pesticides in *** present,hydrogels have been widely reported to promote the formation of soil *** this paper,amphiphilic calcium alginate(ASA/Ca^(2+))was applied to promote the formation of soil aggregation and enhance pesticide ***,an ASA was obtained through the one-pot Ugi condensation(a four-component green chemical reaction).Then,ASA/Ca^(2+) hydrogel is prepared by Ca^(2+) *** formation of soil aggregation was determined through the Turbiscan Lab Expert stability analyzer,Confocal Laser Scanning Microscope(CLSM),and Transmission Electron Microscope(TEM).And the effect of soil aggregation on acetamiprid environmental behavior was investigated by adsorption kinetics,adsorption isotherms,and *** results shown that the three-dimensional network structure of ASA/Ca^(2+) hydrogel can promote the formation of soil *** durability index(ADI)was 0.55 in the presence of ASA/Ca^(2+) hydrogel,indicating that amphiphilic hydrogel can enhance the stability of soil *** adsorbing capacity of acetamiprid was 1.58 times higher than pure soil,and the release of acetamiprid only about 20%in the presence of ASA/Ca^(2+) *** results would be helpful for the formation of soil aggregation and pesticides adsorption on soil ***,ASA/Ca^(2+) hydrogel is likely to improve soil quality,simultaneously it can minimize the mobility of pesticides in the agricultural system.

关键词： soil aggregation Amphiphilic Hydrogel network Pesticides migration

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Impact of biochar amendment on soil aggregation varied with incubation duration and biochar pyrolysis temperature

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Biochar 2021年第3期3卷 339-347页

作者： Lanfang Han Biao Zhang Liying Chen Yanfang Feng Yan Yang Ke Sun Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds Institute of Environmental and Ecological EngineeringGuangdong University of TechnologyGuangzhou 510006China Institute of Agricultural Resources and Environment Jiangsu Academy of Agricultural SciencesNanjing 210014China State Key Laboratory of Water Environment Simulation School of EnvironmentBeijing Normal UniversityBeijing 100875China

soil aggregation is one of the crucial processes that facilitate carbon sequestration and maintain soil *** far,the effect of biochar amendment on soil aggregation remains ***,we tested the hypothesis that the response of soil aggregation to biochar addition varied with incubation duration and biochar chemistry.A one year microcosm experiment of soil with biochar was conducted that included biochar produced at three different temperatures(300,450,and 600°C),and three biochar application rates,i.e.,0,1,and 3 wt%.It was observed that after one and three months,biochar mainly(>90%)distributed in the micro-aggregates,and slightly reduced aggregate stability and increased proportion of micro-aggregates,which was demonstrated to result from the mechanical mixture of amended biochar with ***,when the duration was prolonged to six months and one year,a significant increase in macro-aggregates(6.6-38.5%)and aggregate stability(7.3-29.4%)was detected,with the increasing extent being apparently higher for low-temperature *** was related to the comparatively strong interaction of biochar particles with soil minerals or microbes after long-time *** strong interaction was directly supported by the significant increase in H/C,O/C ratios of isolated biochar from treated soils,the detection of typical soil mineral elements on the surface of isolated biochar,and the increase in microbial biomass carbon of treated *** findings of this study highlighted the role of biochar type and amendment duration in mediating the effect of biochar application on soil aggregation.

关键词： Biochar soil aggregation Aggregate stability Incubation duration

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The features of soil aggregation and its eco-environmental effects under different subalpine forests on the east slope of Gongga Mountain, China

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Journal of Forestry Research 2003年第1期14卷 80-82页

作者：张保华何毓蓉周红艺程根伟中科院成都山地灾害与环境研究所

Structural properties of forest soils have important hydro-ecological function and can influence the soil water-physical characters and soil erosion. The experimental soil samples were obtained in surface horizon (0-10 cm) from different subalpine forest types on east slope of Gongga Mountain in the upriver area of Yangtze River China in May 2002. The soil bulk density, porosity, stable infiltration rate, aggregate distribution and particle-size distribution were analyzed by the routine methods in room, and the features and effects on eco-environment of soil aggregation were studied. The results showed that the structure of soil under mixed mature forest is in the best condition and can clearly enhance the eco-environmental function of soil, and the soil structure under the clear-cutting forest is the worst, the others are ranked between them. The study results can offer a basic guidance for the eco-environmental construction in the upper reaches of Yangtze River.

关键词： soil aggregation Eco-environmental effects Subalpine forest Gongga Mountain, China

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Potential of arbuscular mycorrhizal fungi for soil health:A review

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Pedosphere 2024年第2期34卷 279-288页

作者： Junling ZHANG Ruotong ZHAO Xia LI Jiangzhou ZHANG College of Resources and Environmental Sciences National Academy of Agriculture Green DevelopmentKey Laboratory of Plant-Soil InteractionsMinistry of EducationChina Agricultural UniversityBeijing 100193China College of Agronomy and Life Science Shanxi Datong UniversityDatong 037009China College of Resources and Environment/International Magnesium Institute Fujian Agriculture and Forestry UniversityFuzhou 350002China

soil health is an important component of“One Health”.soils provide habitat to diverse and abundant *** microbial diversity and functions is essential for building healthy soils towards sustainable *** mycorrhizal fungi(AMF)form potentially symbiotic associations with approximately 80%of land plant species that are well recognized for carbon flux and nutrient *** addition to disentangling the signaling pathways and regulatory mechanisms between the two partners,recent advances in hyphosphere research highlight some emerging roles of AMF and associated microbes in the delivery of soil *** paper reviews the contribution of AMF to soil health in agroecosystems,with a major focus on recent progress in the contribution of hyphosphere microbiome to nutrient cycling,carbon sequestration,and soil *** hyphosphere microbiome and fungal stimulants open avenues for developing new fertilizer formulas to promote AMF *** practice,developing AMF-friendly management strategies will have long-term positive effects on sustainable agriculture aiming at simultaneously providing food security,increasing resource use efficiency,and maintaining environment integrity.

关键词： arbuscular mycorrhizal fungi-friendly management strategies carbon sequestration hyphosphere microbiome nutrient cycling soil aggregation soilfunctions

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soil organic carbon stock and fractional distribution across central-south China

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International soil and Water Conservation Research 2021年第4期9卷 620-630页

作者： Rubing Zeng Yujie Wei Jianjia Huang Xin Chen Chongfa Cai Key Laboratory of Arable Land Conservation(Middle and Lower Reaches of Yangtze River)of the Ministry of Agriculture College of Resources and EnvironmentHuazhong Agricultural UniversityWuhan430070China

The stock and stability of soil organic carbon(SOC)are critical to soil functions and global carbon cycle,but little quantitative information is available on the precise location and chemical components of SOC for soils across a wide range of climatic ***,a broad range of zonal soils were collected in forest land at topsoil(0-15 cm)and subsoil(15-30 cm)from temperate to tropical climatic gradient in central to south *** stock and stability of SOC were determined in terms of aggregate and humic *** in bulk soils with a less significant geographic variation was comparably higher at Haplic Luvisoils in temperate regions(3637.61 g m^(−2))and Rhodi-Humic Ferrosols in tropical regions(3446.12 g m^(−2))than in the other experimental soils,but a consistent decreasing trend was observed along the soil profiles with the SOC stock was 1.11-1.97 times higher in the topsoil than in the *** addition,insoluble humin residue(HMr)as the dominant components of SOC ranged from 643.95 to 2696.90 g m^(−2) and decreased from temperate to tropical regions,which was consistent with the zonal variation of humic acids(HAs),but contrary to the zonal variation of fulvic acids(FAs)that fluctuated in a range of 39.67-389.55 g m^(−2) across the experimental *** to the results of partial correlation analysis,the variation of FAs stock was significantly attributed to soil pH,bulk density,iron and aluminum oxides,clay,and clay mineral content(|r|>0.61,psoil physical properties showed a contradictory effects on HAs,iron-linked humin(HMi),clay-combined humin(HMc),and ***,the aggregate-associated carbon stock was mainly stored in macroaggregates(36.34-76.09%)for both SOC and its chemical components,especially in topsoils,and its zonal variation was associated with that of bulk *** general,the redundancy analysis(RDA)revealed that mean annual precipitation(MAP)accounted for 81.8%and 13.8%of the variance in SOC chemical a

关键词： Carbon stock Humic substance soil aggregation

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Microplastic fiber and drought effects on plants and soil are only slightly modified by arbuscular mycorrhizal fungi

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soil Ecology Letters 2022年第1期4卷 32-44页

作者： Anika Lehmann Eva FLeifheit Linshan Feng Joana Bergmann Anja Wulf Matthias C.Rillig Freie Universität Berlin Institut für Biologie14195 BerlinGermany Berlin-Brandenburg Institute of Advanced Biodiversity Research 14195 BerlinGermany Leibniz Centre for Agricultural Landscape Research(ZALF) 15374 MünchebergGermany

Microplastics are increasingly recognized as a factor of global change. By altering soil inherentproperties and processes, ripple-on effects on plants and their symbionts can be ***, interactions with other factors of global change, such as drought, can influence theeffect of microplastics. We designed a greenhouse study to examine effects of polyester microfibers,arbuscular mycorrhizal (AM) fungi and drought on plant, microbial and soil responses. We found thatpolyester microfibers increased the aboveground biomass of Allium cepa under well-watered anddrought conditions, but under drought conditions the AM fungal-only treatment reached the highestbiomass. Colonization with AM fungi increased under microfiber contamination, however, plantbiomass did not increase when both AM fungi and fibers were present. The mean weight diameter ofsoil aggregates increased with AM fungal inoculation overall but decreased when the system wascontaminated with microfibers or drought stressed. Our study adds additional support to themounting evidence that microplastic fibers in soil can affect the plant–soil system by promoting plantgrowth, and favoring key root symbionts, AM fungi. Although soil aggregation is usually positivelyinfluenced by plant roots and AM fungi, and microplastic promotes both, our results show that plasticstill had a negative effect on soil aggregates. Even though there are concerns that microplastic mightinteract with other factors of global change, our study revealed no such effect for drought.

关键词： Arbuscular mycorrhizal fungi Microplastic soil aggregation Organic matter decomposition Drought Root traits

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soil health and root-zone enrichment characteristics between paired grassland and cropland fields in the southeastern United States

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Grassland Research 2023年第4期2卷 299-308页

作者： Alan J.Franzluebbers Stephan van Vliet Sierra Young Matt H.Poore USDA-Agricultural Research Service RaleighNorth CarolinaUSA Department of Nutrition Dietetics&Food SciencesUtah State UniversityLoganUtahUSA Civil and Environmental Engineering Department Utah State UniversityLoganUtahUSA Department of Animal Science North Carolina State UniversityRaleighNorth CarolinaUSA

Background:soil organic C and N data from privately managed pastures in the southeastern United States are relatively ***:A paired-farm approach was deployed to determine how a variety of soil health parameters related to nutrient and water cycling might be altered under grazed,botanically diverse perennial pastures compared with annual monoculture croplands in three Major Land Resource Areas of the southeastern United ***:soil stability index averaged 0.64 and 0.91mm mm^(-1) under cropland and grazed pasture,respectively,suggesting that pastures had a more stable soil surface that was resistant to erosion and allowed rapid water ***-soil organic C and N fractions(i.e.,total,particulate,and mineralizable fractions at 0-10 cm depth)were greater under pasture than under *** locations,root-zone enrichments(0-30 cm depth)of organic C and N fractions were greater under pasture than under *** locations,root-zone enrichment of total soil N was greater(psoil organic C and N and improve soil surface stability conditions compared with neighboring croplands producing commodity feed grains for feedlot finishing.

关键词： land use soil aggregation soil health soil organic matter

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Earthworms promote the accumulation of rhizodeposit carbon to soil macroaggregate in a Mollisol of northeast China,primarily in long-term no-till soil

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soil Ecology Letters 2021年第2期3卷 84-93页

作者： XINYU ZHU YUNCHUAN HU ZHIGUO LI Donghui Wu School of Surveying and Planning Shangqiu Normal UniversityShangqiu 476000China Key Laboratory of Wetland Ecology and Environment Northeast Institute of Geography and AgroecologyChinese Academy of SciencesChangchun 130102China Jilin Provincial Key Laboratory of Animal Resource Conservation and Utilization Northeast Normal UniversityChangchun 130117China Key Laboratory of Vegetation Ecology Ministry of EducationNortheast Normal UniversityChangchun 130024China

As soil ecosystem engineers,earthworms are the main promoters of soil aggregation,a process that drives the production of ecosystem services by soils.A crucial factor in the ecosystem service of carbon sequestration is rhizodeposit carbon,which is the main energy source of soil food *** effects of earthworms on the distribution of rhizodeposit-carbon in soil aggregates remain ***,we conducted a 13CO2 labeling experiment to determine the effects of earthworms on maize rhizodeposit carbon in soil aggregates after 14 years(2002-2016),in both conventional tillage(CT)and conservation tillage(no tillage,NT)*** treatments were established in total:NTE(no tillage soil with earthworms),CTE(conventional tillage soil with earthworms),NTC(control,no tillage soil without earthworms),and CTC(control,conventional tillage soil without earthworms).Earthworms significantly enhanced the abundance of soil macroaggregates(>2000μm and 250-2000μm)on day 30 compared with day 2(after labeling),especially in the *** day 30,in the presence of earthworms,the amounts of rhizodeposit carbon in the>2000μm and 250-2000μm soil aggregates in the NTsoils were significantly higher than in those in the CTsoils(Psoils than in the CT soils(Psoils,with the involvement of earthworm activity,the NT soils promoted more rhizodeposit carbon transformation to the soil *** results clearly indicate that soil macroaggregates formed in different tillage soils in the presence of 2 different engineers(earthworms and roots)significantly differ from those formed in the presence of only one organism(roots)in the long term.

关键词： Earthworms Root-derived carbon soil aggregation Isotope labeling Rhizodeposotion Tillage

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Distribution of soil water-stable aggrega-tes and organic carbon content affected by tillage systems:a meta-analysis

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排灌机械工程学报 2021年第10期39卷 1051-1055页

作者： LU Xingli LI Shanshan LIU Jihu DUAN Yaxin YUE Heng KANG Jianhong WU Hongliang College of Agronomy Ningxia UniversityYinchuanNingxia 750021China

A better understanding of soil carbon(C)distribution within aggregate fractions is essential to evaluating the potential of no-till for sustaining productivity and protecting the environment.A meta-analysis on 744 comparisons from 34 studies was conducted to determine the effects of three different tillage treatments(conventional mouldbould ploughing tillage(CT),reduced tillage(RT)and no tillage(NT))on water-stable aggregate size distribution,soil C concentration in aggregate *** meta-analysis indicates that compared with CT treatment,NT/RT significantly(P2.00 mm)and 5.9%-19.1%(0.25-2.00 mm),whereas NT/RT significantly reduces micro-aggregate and silt clay fractions above 20 ***/RT significantly(P0.25 mm)and micro-aggregate(soil depth compared with *** results suggest that soil sampling depth should be considered to evaluate the influence of tillage systems on the distribution of soil aggregate,and the content of aggregate-associated C content.

关键词： soil aggregation soil organic carbon reduced tillage soil depth

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The main physical properties of planosol in maize(Zea mays L.) cultivation under different long-term reduced tillage practices in the Baltic region

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Journal of Integrative Agriculture 2015年第7期14卷 1309-1320页

作者： K?stutis Romaneckas Egidijus ?arauskis Dovil? Avi?ienyt? Sidona Buragien? David Arney Institute of Agrosystems and soil Sciences Aleksandras Stulginskis University Institute of Agricultural Engineering and Safety Aleksandras Stulginskis University Department of Nutrition and Animal Products Quality Institute of Veterinary Medicine and Animal Sciences Estonian University of Life Sciences

The impact of sustainable reduced tillage （RT） on the physical properties of soil is well documented worldwide; however, there is no precise information about the influence of long-term RT or no-till （NT） on the soils at the boundary for grain maize-growing in the semi-humid subarctic climate conditions of the Baltic states, especially on the formation of a hard- ened upper soil layer （10-15 cm in depth） --＂loosening hardpan＂. This study was carried out at the Research Station of Aleksandras Stulginskis University, Lithuania from 2009-2012. The investigations were based on a long-term （since 1988） field experiment. The aim of the investigation was to ascertain the influence of reduced primary tillage on the main soil＇s physical properties. This study examined soils that were deep ploughing （DP）, shallow ploughing （SP）, deep cultivation （DC）, shallow cultivation （SC）, and no-till （NT）. Reducing the tillage intensity to NT had no significant effect on the structural soil＇s composition; however, the stability of the structure of the 〉1 and 〉0.25 mm-size fractions was significantly higher in the non-reversibly tilled （DC, SC） and NT plots. The penetration resistance of the DP soils was less after primary tillage and wintering, and became similar to the NT plots at the end of the maize growth season. After primary tillage and wintering, the soil moisture content in the upper soil layer （0-5 cm depth） of the NT plots was 17-49 and 16-18% higher than that in the DP. Long-term reduction of primary tillage up to NT generally had no significant effect on the moisture content and soil bulk density of the 0-10 and 10-20 cm layers. The results showed that long-term RT stabilized the physical quality of soil. Less soil penetration resistance was established in the DP plots compared to both RT and NT, however, indicators of the formation of a uniform ＂loosening hardpan＂ layer were not found. It is summarized that long-term RT or NT systems stabilize, or may increase, the physical

关键词： bulk density maize moisture content penetration resistance reduced tillage soil aggregation

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