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Variation Characteristics of Root Traits of Different Alfalfa Cultivars under Saline-Alkaline Stress and their Relationship with soil environmental factors

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Phyton-International Journal of Experimental Botany 2024年第1期93卷 29-43页

作者： Tian-Jiao Wei Guang Li Yan-Ru Cui Jiao Xie Xing-Ai Gao Xing Teng Xin-Ying Zhao Fa-Chun Guan Zheng-Wei Liang Northeast Agricultural Research Center of China Jilin Academy of Agricultural SciencesChangchun130033China Northeast Institute of Geography and Agroecology Chinese Academy of SciencesChangchun130102China

soil salinization is the main factor that threatens the growth and development of plants and limits the increase of *** is of great significance to study the key soil environmental factors affecting plant root traits to reveal the adaptation strategies of plants to saline-alkaline-stressed soil *** this study,the root biomass,root morphological parameters and root mineral nutrient content of two alfalfa cultivars with different sensitivities to alkaline stress were analyzed with black soil as the control group and the mixed saline-alkaline soil with a ratio of 7:3 between black soil and saline-alkaline soil as the saline-alkaline treatment *** the same time,the correlation analysis of soil salinity indexes,soil nutrient indexes and the activities of key enzymes involved in soil carbon,nitrogen and phosphorus cycles was carried *** results showed that compared with the control group,the pH,EC,and urease(URE)of the soil surrounding the roots of two alfalfa cultivars were significantly increased,while soil total nitrogen(TN),total phosphorus(TP),organic carbon(SOC),andα-glucosidase activity(AGC)were significantly decreased under saline-alkaline *** was no significant difference in root biomass and root morphological parameters of saline-alkaline tolerant cultivar GN under saline-alkaline *** number of root tips(RT),root surface area(RS)and root volume(RV)of AG were reduced by 61.16%,44.54%,and 45.31%,respectively,compared with control *** ratios of K^(+)/Na^(+),Ca^(2+)/Na^(+)and Mg^(2+)/Na^(+)of GN were significantly higher than those of AG(psoil SOC and TN,but negatively regulated by soil pH,EC,and URE(psoil TN,TP and SOC(psoilβ-glucosidase ac

关键词： Saline-alkaline stress alfalfa root traits soil environmental factors correlation analysis

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Graphene oxide influences bacterial community and soil environments of Cd-polluted Haplic Cambisols in Northeast China

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Journal of Forestry Research 2021年第4期32卷 1699-1711页

作者： Jiaxin Ru Guoyou Chen Yong Liu Ying Sang Jinfeng Song Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education School of ForestryNortheast Forestry UniversityHarbin 150040HeilongjiangPeople’s Republic of China Inspection and Testing Center for Quality of Cereals and their Products-Ministry of Agriculture and Rural Aff airs Quality and Safety Institute of Agricultural ProductsHeilongjiang Academy of Agricultural SciencesHarbin 150086HeilongjiangPeople’s Republic of China Xinghua Products Quality Inspection and Testing Center No.4 Zhonghe RoadTaizhou 225700JiangsuPeople’s Republic of China

Graphene oxide(GO),a carbon nanomaterial that is widely used in the environment and other industries,may pose potential risks to ecosystems,especially the soil *** soils in Northeast China are frequently polluted with cadmium(Cd) ***,there is no study on the influence of GO on the Cd-contaminated soil microbial community and soil chemical *** this study,Cd(100 mg kg^(-1))-polluted soils were treated with different concentrations of GO(0,25,50,150,250,and 500 mg L^(-1),expressed as T1,T2,T3,T4,T5,and T6,respectively) for 40 *** treatment without Cd pollution and GO served as the control(CK).Then,we investigated the influence of the GO concentrations on the bacterial community and chemical properties of Cd-polluted Haplic Cambisols,the zonal soil in Northeast *** GO addition,the richness and diversity indexes of the bacterial community in Cd-contaminated Haplic Cambisols initially increased by 0.05-33.92% at 25 mg L^(-1),then decreased by0.07-2.37% at 50 mg L^(-1),and then increased by 0.01-24.37%within 500 mg L^(-1) *** species and abundance of bacteria varied with GO concentration,and GO significantly increased bacterial growth at 25 and 250 mg L^(-1).GO treatments influenced the bacterial community structure,and the order of similarity of the bacterial community structure was as follows:T4=T5> T1=T6> T2> T3> *** and Acidobacteria were the dominant bacteria,accounting for 36.0% and 26.2%,respectively,of soil *** GO treatments also significantly affected the metabolic function of bacteria and further influenced the diversity of the bacterial community structure by affecting several key soil chemical properties:soil pH,organic matter and available potassium,phosphorus,and *** results provide a theoretical basis for scientific and comprehensive evaluation of the environmental impacts of GO on the zonal forest soils of Northeast China.

关键词： Cadmium pollution Haplic cambisols Graphene oxide Bacterial community soil environmental factors

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Impacts of changed litter inputs on soil CO2 efflux in three forest types in central south China

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Science Bulletin 2013年第7期58卷 750-757页

作者： YAN WenDe CHEN XiaoYong TIAN DaLun PENG YuanYing WANG GuangJun ZHENG Wei National Engineering Laboratory for Applied Forest Ecological Technology in Southern China Natural Sciences Division College of DuPage College of Arts and Sciences Governors State UniversityUniversity Park College of Life Science and Technology Central South University of Forestry and Technology

Climate change is expected to cause the alteration of litter production in forests,which may result in substantial changes in soil CO2 efflux (FCO2) process as litter represents a major pathway of carbon from vegetation to the *** this study,we conducted an aboveground litter manipulation experiment to examine the influence of litter addition and exclusion on soil FCO2 in Camphor tree,Masson pine,and mixed Camphor tree and Masson pine forests in central south *** input manipulation included three treatments:non-litter input (litter exclusion),double litter input (litter addition),and natural litter input (control).On average,litter exclusion significantly reduced soil FCO2 rate by approximately 39%,24% and 22% in Camphor tree forests,the Mixed forests,and Masson pine forests,*** a yearly basis,double litter addition significantly increased soil CO2 by 12% in the Mixed forests (P=0.02) but not in both Camphor tree and Masson pine forests (P>0.05),when compared with their corresponding control ***,litter addition increased soil FCO2 rates in the months of June-August in Camphor tree and Masson pine forests,coinciding with high soil temperature of summer *** exclusion reduced soil FCO2 more than litter addition increased it in the study *** of soil respiration to litter input treatments varied with forest *** input treatments did not alter the seasonal patterns of soil temperature and soil water *** results indicated that changes in aboveground litter as a result of global climate change and/or forest management have a great potential to alter soil respiration and soil carbon balance in forest ecosystems.

关键词： soil respiration litter exclusion litter addition subtropical forests soil environmental factors

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Rhizosphere soil Fungal Diversity and soil Physicochemical Properties of Different Vegetations in Tundra of Changbai Mountain

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Journal of Geoscience and Environment Protection 2023年第2期11卷 13-29页

作者： Ran Hao Li Yang Yihui Wang Dalian Minzu University College of Environment and Bioresources Dalian China Dalian Huali Jingang Pharmaceutical Co. Ltd. Dalian China

By studying the diversity and community structure of rhizosphere soil fungi of different plants in the tundra on the northern slope of Changbai Mountain, it provides theoretical support for the restoration of environmental degradation and in-depth study of fungal diversity in the tundra of Changbai Mountain. High-throughput sequencing technology was used to determine the ITS1 region of fungal amplicons, so as to analyze the diversity of fungal communities in the rhizosphere soil of six plants in the tundra of Changbai Mountain, and to analyze the correlation between the environment and the diversity and richness of fungal communities in combination with relevant soil physical and chemical factors. The diversity and richness of fungal community in the rhizosphere soil of six plants in Changbai Mountain tundra were different. The Simpson and Shannon indexes of Saxifraga stolonifera Curt were the highest, and the richness of fungal community in Dryas octopetala was the highest. The analysis of fungal community composition showed that the fungal colonies in plant rhizosphere soil samples mainly belonged to Ascomycota and Basidiomycota, which were the main dominant phyla. Mortierella, Fusarium and Sordariomycetes are common fungal genera in the rhizosphere soil of six plants, but their abundances are different among different plants. Water content was negatively correlated with fungal diversity, and TP was positively correlated with fungal community diversity. There were some differences in the composition and diversity of rhizosphere soil fungal communities of six plants in Changbai Mountain tundra. Ascomycota and Basidiomycota were the main soil fungal phyla in the rhizosphere of six plants in Changbai Mountain tundra. The results could provide theoretical guidance for ecological protection of Changbai Mountain tundra.

关键词： Changbai Mountain Rhizosphere soil Fungal Diversity soil environmental factors

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Impacts of changed litter inputs on soil CO_2 efflux in three forest types in central south China

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Science China(Technological Sciences) 2013年第3期56卷 750-757页

作者： YAN WenDe CHEN XiaoYong TIAN DaLun PENG YuanYing WANG GuangJun ZHENG Wei National Engineering Laboratory for Applied Forest Ecological Technology in Southern China College of Life Science and Technology Central South University of Forestry and Technology College of Arts and Sciences Governors State UniversityUniversity Park Natural Sciences Division College of DuPage

Climate change is expected to cause the alteration of litter production in forests, which may result in substantial changes in soil CO2 effiux （FCO2） process as litter represents a major pathway of carbon from vegetation to the soils. In this study, we conducted an aboveground litter manipulation experiment to examine the influence of litter addition and exclusion on soil FCO2 in Camphor tree, Masson pine, and mixed Camphor tree and Masson pine forests in central south China. Litter input manipulation included three treatments： nonqitter input （litter exclusion）, double litter input （litter addition）, and natural litter input （control）. On average, litter exclusion significantly reduced soil FCO2 rate by approximately 39%, 24% and 22% in Camphor tree forests, the Mixed forests, and Masson pine forests, respectively. On a yearly basis, double litter addition significantly increased soil CO2 by 12% in the Mixed forests （P=0.02） but not in both Camphor tree and Masson pine forests （P〉0.05）, when compared with their corre- sponding control treatments. However, litter addition increased soil FCO2 rates in the months of June-August in Camphor tree and Masson pine forests, coinciding with high soil temperature of summer conditions. Litter exclusion reduced soil FCO2 more than litter addition increased it in the study sites. Responses of soil respiration to litter input treatments varied with forest types. Litter input treatments did not alter the seasonal patterns of soil temperature and soil water content. Our results indicated that changes in aboveground litter as a result of global climate change and/or forest management have a great potential to alter soil respiration and soil carbon balance in forest ecosystems.

关键词： soil respiration litter exclusion litter addition subtropical forests soil environmental factors

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