应用生态学报最新文献

{"title":"[Relationship between the prophase growth of knots and the radial growth of trunk in <i>Pinus koraiensis</i>].","authors":"Suriguga Bai, Wei-Wei Jia, Hao-Tian Guo","doi":"10.13287/j.1001-9332.202410.009","DOIUrl":"https://doi.org/10.13287/j.1001-9332.202410.009","url":null,"abstract":"<p><p>We analyzed the differences in knot property of linear and curved knots of dominant, medium, and inferior wood with thirty-three <i>Pinus koraiensis</i> trees from Mengjiagang Forest Farm and Linkou Forestry Bureau in Heilongjiang Province. We divided the 33 trees into two groups according to the height of the site index. We constructed a trunk diameter growth models to explore the connection, between the knot growth inflection points and the successive growth of diameter, and to screen for the types that had a weaker impact on wood quality. The results showed that there were significant differences in knot diameter, sound knot length, proportion of loose knot and inflection point age between the two knot types. The growth inflection point of curved knot was between 8 and 12 years old, while that of linear knot was between 7 and 10 years old. The knot of curved knots in different grades of wood were larger than linear knot in terms of knot diameter and sound knot length. The decrease in the proportion of sparse knots indicated that the healing time of knot became shorter. The growth of linear knots remained essentially uniform with radial growth. The age of the growth inflection point of curved knots was later than the age at which the maximum of successive annual growth in diameter was produced. The age of trunk diameter inflection and the age of knot growth inflection were later for better site conditions. The age of trunk diameter inflection and the age of knot growth inflection were later for dominant woods than for average nodule growth. Different site conditions and trunk diameters affected nodule growth, and nodule attributes differed between the two nodule types as trunk diameter grew. Delaying the maximum continuous annual growth by rationally formulating forest management measures can lengthen the duration of trunk growth while extending branch growth, increase the proportion of curved knot to optimize wood quality, and improve wood quality.</p>","PeriodicalId":35942,"journal":{"name":"应用生态学报","volume":"35 10","pages":"2648-2656"},"PeriodicalIF":0.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142898886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Effect of exogenous paclobutrazol on the drought resistance of <i>Phoebe bournei</i> seedlings under drought stress].","authors":"Yan-Yan Song, Pei-Yue Xu, Gong-Xiu He, Kong-Fei Hu, Li Ji, Li-Li Yang, Hong-Gang Sun, Xie Zhang","doi":"10.13287/j.1001-9332.202410.007","DOIUrl":"https://doi.org/10.13287/j.1001-9332.202410.007","url":null,"abstract":"<p><p>To clarify the response mechanism of exogenous paclobutrazol on drought resistance in <i>Phoebe bournei</i> seedlings, we investigated the effects of spraying different concentrations of paclobutrazol (25, 50, 100 mg·L^-1) on the photosynthetic and antioxidant systems of 2-year-old <i>P. bournei</i> seedlings under drought stress using natural drought method. The results showed that drought stress significantly reduced the photosynthesis and broke the dynamic balance of antioxidant system in <i>P. bournei</i> seedlings. Spraying with different concentrations of paclobutrazol effectively alleviated the negative impacts of drought stress, and enhanced the defense capability of photosynthetic and antioxidant systems, with the 100 mg·L^-1 paclobutrazol treatment being the most effective. Under exogenous 100 mg·L^-1 paclobutrazol treatment, the total chlorophyll in leaves increased significantly, with a maximum increase of 51.9%. The apparent photosynthetic electron transfer rate, photochemical quenching coefficient and actual photochemical quantum yield were significantly increased, with maximum increase of 67.8%, 58.4%, and 59.7%, respectively. The net photosynthetic rate, stomatal conductance and transpiration rate, were enhanced, reaching maximum increase of 65.5%, 65.4%, and 68.6%, respectively. In summary, exogenous 100 mg·L^-1paclobutrazol has the strongest ability to enhance drought resistance of <i>P. bournei</i> seedlings by regulating photosynthetic and antioxidant systems.</p>","PeriodicalId":35942,"journal":{"name":"应用生态学报","volume":"35 10","pages":"2667-2676"},"PeriodicalIF":0.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142898438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Effects of seed carrier-immobilized microorganisms on the growth of rapeseed and the remediation of petroleum hydrocarbon contaminated soil].","authors":"Yan-Qiu Zhou, Fa-Yun Li, Wei Wang, Chun-Liang Zhou, Rong-Ju Jiang","doi":"10.13287/j.1001-9332.202410.031","DOIUrl":"https://doi.org/10.13287/j.1001-9332.202410.031","url":null,"abstract":"<p><p>Petroleum hydrocarbon pollutants in soil are challenging to biodegrade, negatively impacting plant growth as well as the metabolic activity and community structure of soil microorganisms. Microorganisms immobilized by seed carriers can synergistically contribute to the remediation of petroleum hydrocarbon-contaminated soil. We prepared a rape seed carrier with immobilized microorganism by seed coating (with a mixture of diatomaceous earth and bentonite as fillers) and microbial immobilization. A pot experiment was conducted with the following treatments: control (CK, neither seeds nor microorganisms added), bare rapeseed (T₁), rapeseed coated with diatomaceous earth and bentonite (T₂), free-living <i>Pseudomonas aeruginosa</i> added (T₃), rapeseed coated with diatomaceous earth and bentonite plus free-living <i>P. aeruginosa</i> (T₄), and rapeseed coated with diatomaceous earth and bentonite immobilized with <i>P. aeruginosa</i> (T₅). We measured rape seed growth, rhizosphere microbial community structure, and petroleum hydrocarbon removal efficiency. The results showed that 1) There were no significant difference in seed germination rate among T₁, T₂, T₄, and T₅ treatments. Compared to T₁, leaf length, root length, biomass, and soluble protein content of rape seed significantly increased in T₄ and T₅ treatments, while T₂ treatment showed no significant effect. Leaf width, stem length, chlorophyll content, and superoxide dismutase activity of rape seed in T₂, T₄, and T₅ treatments were significantly higher than T₁, while malondialdehyde content was signi-ficantly lower. 2) Compared to CK, the removal rate of petroleum hydrocarbon in the T₁, T₂, T₃, T₄, and T₅ treatments increased by 0.8, 1.6, 0.5, 1.8, and 2.2 times, respectively. The T₅ treatment achieved the highest petro-leum hydrocarbon removal rate of 54.0%. Soil dehydrogenase activity in all treatments increased significantly, with a positive correlation with the petroleum hydrocarbon removal rate (<i>r</i>=0.893). 3) The T₅ treatment had the highest soil microbial α diversity and the abundances of Chloroflexi and Acidobacteria. In conclusion, seed carriers with immobilized microorganisms could regulate plant growth, modify the structures of microbial communities, enhance the biological activity of soil enzymes, thereby improving petroleum hydrocarbon removal efficiency. This provides a novel environmentally friendly approach for the joint remediation of petroleum hydrocarbon-polluted soil by plants and microorganisms.</p>","PeriodicalId":35942,"journal":{"name":"应用生态学报","volume":"35 10","pages":"2897-2906"},"PeriodicalIF":0.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142898779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Quantitative classification and biodiversity characteristics of plant communities in Luoshan Mountain steppe, Ningxia, China].","authors":"Qian-Fei Li, Yan Shen, Hong-Bin Ma, Ze-Qin Xiong, Guo-Hui Wang, Xin-Ru Huo, Wen Li","doi":"10.13287/j.1001-9332.202410.004","DOIUrl":"https://doi.org/10.13287/j.1001-9332.202410.004","url":null,"abstract":"<p><p>To understand the distribution pattern and influencing factors of plant community and diversity along the altitude gradient, we examined plant community types, plant diversity and phylogenetic diversity of mountain steppe in Luoshan, Ningxia, and analyzed the relationship between the plant community and its diversity and environmental driving factors. The results showed that the main community types in the mountain steppe were <i>Asterothamnus centraliasiaticus</i> community, <i>Caragana tibetica</i> community, <i>Convolvulus tragacanthoides</i> community, <i>Stipa bungeana</i> community, <i>Stipa breviflora</i>＋<i>Ajania achilloides</i> community, <i>Artemisia frigida</i> community, <i>Roegneria alashanica</i>＋<i>S. breviflora</i>＋<i>Hedysarum polybotrys</i> community, <i>S. breviflora</i>＋<i>Stipa grandis</i> community, <i>S. grandis</i>＋<i>S. bungeana</i> community, <i>Cyperus glomeratus</i> community, <i>S. grandis</i> community and <i>Carex aridula</i> community. The distribution of mountain steppe community was mainly affected by altitude, soil alkali-hydrolyzed nitrogen, water content, available potassium, silt and organic matter contents, with altitude and soil water content having the greatest effects (<i>P</i><0.01). The Patrick index and phylogenetic diversity index (PD) of plant community showed an increasing trend with the altitude increase, the Shannon index and Pielou index showed a unimodal trend, and the phylogene-tic structure gradually changed from aggregation to dispersion. There was a significant positive correlation between species diversity index and PD index. Shannon index was negatively correlated with net relatedness index (NRI). Plant species diversity and phylogenetic diversity of mountain steppe were mainly affected by soil water content, available potassium, total nitrogen, silt and sand contents. NTI was significantly affected by altitude, while the NRI index was significantly affected by soil silt content.</p>","PeriodicalId":35942,"journal":{"name":"应用生态学报","volume":"35 10","pages":"2697-2706"},"PeriodicalIF":0.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142898866","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Research progress on the effect of estuary microplastics on antibiotic resistance genes].","authors":"Qing Wang, Jing-Hao Qiu, Yan Sun, Ni Ni, Shao-Jing Sun, Xu-Li Li, Sheng-Juan Yang, Yi-Ran Liu, Ying-Ying Cui","doi":"10.13287/j.1001-9332.202410.028","DOIUrl":"https://doi.org/10.13287/j.1001-9332.202410.028","url":null,"abstract":"<p><p>Estuaries are transitional zones between rivers and marine environments, with intensive human activities. Pollutants pose a threat to the ecological systems of estuaries. Among these pollutants, microplastics and antibiotic resistant genes have gained significant attention due to their potential impacts on estuarine organisms and human health. Microplastics can form unique biofilms, adsorb pollutants from the surrounding environment, and provide potential hosts for antibiotic resistant genes, with positive consequence on horizontal gene transfer of antibiotic resistance. We provided an overview of the pollution status of microplastics and antibiotic resistant genes in estua-rine areas, with a particular emphasis on the influence of biofilms formed on microplastics on the enrichment, transport, and transfer of antibiotic resistant genes. We also highlighted the limitations in current research, regarding microplastic sampling, analysis methods, and inconsistent reporting units. Furthermore, we proposed prospects for the biodegradation of microplastics and potential risk assessment of microplastic biofilms.</p>","PeriodicalId":35942,"journal":{"name":"应用生态学报","volume":"35 10","pages":"2916-2924"},"PeriodicalIF":0.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142898948","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Soil health evaluation of loquat orchard based on soil quality index method].","authors":"Xin-Tao Cui, Mou-Liang Xiao, Yu-Xiao Zhao, Yu-Ping Wu, Bi-Bo Wu, Lin Qi, He-Meng Li, Chao-Xu Yu, Shun-Bao Lu, Yan-Jie Zhang, Ti-da Ge","doi":"10.13287/j.1001-9332.202410.013","DOIUrl":"https://doi.org/10.13287/j.1001-9332.202410.013","url":null,"abstract":"<p><p>Fruit quality and yield in orchards will decrease after long-term planting. To analyze the changes of soil quality under different planting years and identify the key factors of the declining of orchard soil quality could provide scientific foundation for optimizing fertilization management of orchard soil. In this study, we analyzed the changes of soil physical, chemical, and biological properties of loquat orchard under different planting years (<10 years, 10-15 years, 15-20 years, ≥20 years) in Ninghai County, Zhejiang Province, and evaluated soil health by using soil quality index, multifunctionality index, and sensitivity and resistance indicators. The results showed that, compared with the orchards planting less than 10 years, soil bulk density in the orchards with planting years of 10-15 years and over 20 years increased by 12.8% and 13.6%, respectively. Soil pH decreased by 8.8%, 8.6%, and 7.5% in the orchards with planting years of 10-15 years, 15-20 years and over 20 years, respectively. With the increase of planting years, soil microbial biomass carbon, soluble organic carbon, soluble organic nitrogen, available phosphorus, available potassium, total organic carbon, total nitrogen decreased, and the soil quality and multifunctionality index of loquat orchard soil decreased. Compared with the orchards planting less than 10 years, soil quality index and soil multifunctionality index decreased by 20.4% and 17.9% for the orchards with the planting years of 10-15 years, 38.1% and 25.2% for the orchards with the planting years between 15-20 years, and 50.7% and 35.5% for the orchards planting over 20 years, respectively. The key factors affecting soil quality of loquat orchards were soil soluble nitrogen, available potassium, and available phosphorus. Amongst the available nutrients, NH₄⁺ and NO₃^- were the sensitive indices in orchard soil. In conclusion, long-term planting decreased soil quality and available nutrient content in loquat orchards.</p>","PeriodicalId":35942,"journal":{"name":"应用生态学报","volume":"35 10","pages":"2775-2784"},"PeriodicalIF":0.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142898951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Differences of driving factors for carbon sink changes in different carbon pools of <i>Larix gmelinii</i> natural forests].","authors":"Xue-Song Mei, Guan-Mou Chen, Ling-Bo Dong","doi":"10.13287/j.1001-9332.202410.006","DOIUrl":"https://doi.org/10.13287/j.1001-9332.202410.006","url":null,"abstract":"<p><p>Carbon balance of the tree layer in natural forests is affected by three carbon pools: tree growth, morta-lity, and recruitment. However, the dynamics of the sink of each carbon pool and the driving factors are still unclear. To this end, we used stepwise regression method and structural equation model to assess the effects of biotic (stand and diversity) and abiotic (soil, topography and climate) factors on three dynamic processes of carbon sinks, namely, stand growth, recruitment and mortality, in the natural forests of <i>Larix gleminii</i>, based on the data from the seventh and eighth national continuous forest inventory of the Greater Khingan Mountains. The results showed that the average growth, recruitment and mortality of <i>L. gleminii</i> stand were 0.73, 0.17 and 0.41 t·hm^-2·a^-1. The growth of carbon sink in forest stands increased with the slope aspect index (the total path coefficient <i>β</i>=0.135), stand basal area (<i>β</i>=0.132) and slope position (<i>β</i>=0.085), but decreased with the increases of average stand age (<i>β</i>=-0.225) and altitude (<i>β</i>=-0.196). Recruitment was negatively correlated with stand basal area (<i>β</i>=-0.368), average stand age (<i>β</i>=-0.240), soil pH (<i>β</i>=-0.184), soil total phosphorus (<i>β</i>=-0.115) and tree species richness (<i>β</i>=-0.012), and was positively correlated with soil total nitrogen (<i>β</i>=0.258). The larger important factors affecting mortality were the average tree height (<i>β</i>=0.276) > Simpson index (<i>β</i>=0.232) > soil total phosphorus (<i>β</i>=0.195) > stand basal area (<i>β</i>=0.154) > soil pH (<i>β</i>=0.084). Stand age, basal area and average tree height were the most important factors affecting stand carbon sink growth, recruitment and mortality. Topography and soil conditions were also the key to affect stand dynamics. Therefore, the structure and soil conditions of the forest can be adjusted through reasonable thinning in the management process, which in turn promotes the sustained fulfilment of forest carbon sink capacity.</p>","PeriodicalId":35942,"journal":{"name":"应用生态学报","volume":"35 10","pages":"2639-2647"},"PeriodicalIF":0.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142897834","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[PLSR model based on near-infrared spectroscopy for the detection of wood fiber anatomy of <i>Schima superba.</i>]","authors":"Cheng-Fu Lin, Wen Shao, Jia-Yi Wang, Rui Zhang, Li-Zhen Ma, Shao-Hua Huang, Hui-Hua Fan, Zhi-Chun Zhou","doi":"10.13287/j.1001-9332.202410.003","DOIUrl":"https://doi.org/10.13287/j.1001-9332.202410.003","url":null,"abstract":"<p><p>To rapidly acquire fiber phenotypic data for wood quality assessment, we used a portable NIR spectro-meter to collect spectral data in 100 individuals of <i>Schima superba</i> at 18-year-old of 20 different provenances, and simultaneously collected wood cores. Wood basic density and the anatomical structure of wood fiber were measured. The standard normal variate (SNV), orthogonal signal correction (OSC), and multiplicative scatter correction (MSC) methods were used for spectral preprocessing, the competitive adaptive reweighted sampling (CARS) method were used for wavelength selection, and the partial least squares regression (PLSR) model were established. The results showed a significant difference for the absolute reflectance data between forest and indoor environments, and the spectral data of which were relatively independent. SNV, OSC and MSC showed significant differences for predictive performance of the model. OSC had the excellent preprocessing capability in multiple cha-racteristics of wood fiber ether in forest and indoor environments. The predictive accuracy of the models with <i>R</i>² was 0.47-0.78 in forest (average=0.63), and <i>R</i>² was 0.54-0.82 in indoor environment (average=0.71). However, the SNV and MSC methods could not establish the models, except the fiber wall-cavity ratio from forest data. After wavelength selection through the CARS method, the predictive accuracy of the models was significantly improved using both forest and indoor data (<i>R</i>²=0.58 and 0.72, respectively). When performed OSC before and after CARS, the predictive accuracy of the models was improved to 0.68 and 0.84 respectively using forest and indoor data. The OSC and CARS could significantly improve the accuracy of the models for wood fiber anatomical structures. First OSC, then CARS, and finally OSC methods could be used to establish the PLSR model for fiber length, fiber cell wall thickness, fiber lumen diameter, wood basic density, fiber cavity-width ratio, and fiber wall-cavity ratio, and the <i>R</i>² ranged from 0.80 to 0.95. These models had effective predictive ability and accuracy to assess the physical properties of wood fibers of <i>S. superba</i>.</p>","PeriodicalId":35942,"journal":{"name":"应用生态学报","volume":"35 10","pages":"2794-2802"},"PeriodicalIF":0.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142898859","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Land use changes and driving forces of landslide area in Tongwei County, Gansu Province, Northwest China from 1985 to 2020.]","authors":"Jing Jia, Xing Su, Jun Zhang, Chang-Liang Lu, Man-Yin Zhang, Xia Li, Yao-Gang Dong, Hao-Chen Ren","doi":"10.13287/j.1001-9332.202410.020","DOIUrl":"https://doi.org/10.13287/j.1001-9332.202410.020","url":null,"abstract":"<p><p>Accurately analyzing the type of land use and change characteristics of disaster damage in landslide areas is of great significance to scientifically promote the optimization of regional land use pattern and disaster prevention and mitigation. We analyzed the characteristic parameters of landslides as well as the characteristics and driving factors of land use change from 1985 to 2020 in Tongwei County, Gansu Province, using ALOS DEM data and 1985-2020 land use data, GIS spatial analysis, land-use dynamic attitude, transfer matrix, and Geodetector. The results showed that a total of 1012 landslide samples were identified, characterized by medium elevation, gentle gradient, low elevation difference, short length, and small size. During 1985-2020, landslide area land use types were cropland, woodland, grassland, bare land and impervious surface, dominated by grassland and cropland. During 2015-2020, each category of single land use dynamic attitude reached the largest, with the value of cropland, grassland, woodland, bare land, and the combined land use being 3.1%, 3.0%, 10.9%, 20.0%, 1.5%, respectively. During the study period, land use change was dominated by cropland and grassland, with a total reduction of 4.39 km² in cultivated land area, which was converted into grassland and forest. There was no change in bare land and impervious surfaces. We investigated the driving factors of land use change across 2000-2005 and 2015-2020. Slope and normalized difference vegetation index had a stronger explanatory power for land use change during 2000-2005, while slope, population density and total population had a stronger explanatory power during 2015-2020. The land use mode of regional individual landslide tended to be unified, and the increase of grassland enhanced the vegetation cover of the region. The findings would provide a scientific basis for the development and reuse of disaster damaged land and ecological restoration.</p>","PeriodicalId":35942,"journal":{"name":"应用生态学报","volume":"35 10","pages":"2833-2841"},"PeriodicalIF":0.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142898852","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Changes of soil microbial phospholipid fatty acid in soil profile under different land use types].","authors":"Xu-Man Ma, Xiao-Meng Yu, Wei-Peng Wang, Ya-Xin Meng, Xue-Hua Xu","doi":"10.13287/j.1001-9332.202410.016","DOIUrl":"https://doi.org/10.13287/j.1001-9332.202410.016","url":null,"abstract":"<p><p>We elucidated the changes of soil microbial biomass and community structure in soil profiles under four typical land use types (farmland, grassland, <i>Betula platyphylla</i> secondary forest and <i>Larix principis-rupprechtii</i> plantation)and across five soil layers (0-10, 10-20, 20-30, 30-40, 40-50 cm) in the northern mountainous region of Hebei Province. We measured soil microbial biomass by phospholipid fatty acid (PLFA) method, and investigated the effects of land use and soil depth on soil microbial biomass and community structure by variance analysis, correlation analysis and redundancy analysis. The results showed that soil water content, bulk density, and organic carbon content of farmland differed significantly from other land use types. The content of PLFA in farmland was significantly lower than that in other land use types. The Gram-positive bacteria/Gram-negative bacteria (G⁺/G^-) in farmland were higher, and the nutrient stress was greater. With the increase of soil depth, soil water content, organic carbon, total nitrogen, total phosphorus and microbial biomass of the four land use types showed a decreasing trend. In grassland, secondary forest and plantation, G⁺/G^- was larger in deep soil than top soil. Except for grassland, the bacteria/fungi was smaller in deep soil than top soil. Correlation analysis and redundancy analysis showed that soil bulk density, natural water content and organic carbon were the main environmental factors affecting microbial communities in the four land use types. Our results would provide theoretical basis for the optimization of land use structure in the northern mountainous region of Hebei Province.</p>","PeriodicalId":35942,"journal":{"name":"应用生态学报","volume":"35 10","pages":"2755-2764"},"PeriodicalIF":0.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142899007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}