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Aboveground carbon sequestration of Cunninghamia lanceolata forests:Magnitude and drivers

Forest Ecosystems 2024年第1期11卷 32-41页

作者： Chen Wang Shuguang Liu Yu Zhu Andrew R.Smith Ying Ning Deming Deng National Engineering Laboratory for Applied Technology of forestry&Ecology in South China Central South University of Forestry and TechnologyChangsha 410004China Technology Innovation Center for Ecological Conservation and Restoration in Dongting Lake Basin Ministry of Natural ResourcesChangsha 410007China College of Life Science and Technology Central South University of Forestry and TechnologyChangsha 410004China School of Ecology and Environment Hainan UniversityHaikou 570228China School of Natural Sciences Bangor UniversityGwyneddLL572UWUK College of forestry Central South University of Forestry and TechnologyChangsha 410004China Hunan Prospecting Designing&research General institute for Agriculture Forestry&IndustryChangsha 410007China

Understanding the spatial variation,temporal changes,and their underlying driving forces of carbon sequestration in various forests is of great importance for understanding the carbon cycle and carbon management *** carbon density and sequestration in various Cunninghamia lanceolata forests,extensively cultivated for timber production in subtropical China,vary with biodiversity,forest structure,environment,and cultural factors remain poorly explored,presenting a critical knowledge gap for realizing carbon sequestration supply potential through *** on a large-scale database of 449 permanent forest inventory plots,we quantified the spatial-temporal heterogeneity of aboveground carbon densities and carbon accumulation rates in Cunninghamia lanceolate forests in Hunan Province,China,and attributed the contributions of stand structure,environmental,and management factors to the heterogeneity using quantile age-sequence analysis,partial least squares path modeling(PLS-PM),and hot-spot *** results showed lower values of carbon density and sequestration on average,in comparison with other forests in the same climate zone(i.e.,subtropics),with pronounced spatial and temporal ***,quantile regression analysis using carbon accumulation rates along an age sequence showed large differences in carbon sequestration rates among underperformed and outperformed forests(0.50 and 1.80 Mg·ha^(-1)·yr^(-1)).PLS-PM demonstrated that maximum DBH and stand density were the main crucial drivers of aboveground carbon density from young to mature ***,species diversity and geotopographic factors were the significant factors causing the large discrepancy in aboveground carbon density change between low-and high-carbon-bearing *** analysis revealed the importance of culture attributes in shaping the geospatial patterns of carbon *** work highlighted that retaining largesized DBH trees and increasing shade-t

关键词： Carbon density Carbon accumulation rate Forest age Spatial variation Cultural influence

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Rice Variety Classification Based on Optimized Near-Infrared Spectral Classification Model

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Rice science 2024年第1期31卷 6-9,I0009-I0012页

作者： YANG Sen WANG Zhenmin ZHANG Houqing SONG Wenlong College of Computer and Control Engineering Northeast Forestry UniversityHarbin 150040China The 49th research institute of China Electronics Technology Group Corporation Harbin 150000China

Accurate classification of rice variety is essential to ensure the brand value of high-quality rice *** the impact of sample state on modeling optimization algorithms,rice samples after grinding and sealing were *** enhance the accuracy of rice variety classification,we introduced a spectral characteristic wavelength selection method based on adaptive sliding window permutation entropy(ASW-PE).

关键词： sealing Infrared grinding

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High-entropy alloys in thermoelectric application:A selective review

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Chinese Physics B 2024年第5期33卷 1-11页

作者：任凯霍文燚陈帅程渊王彪张刚 Zhengzhou University Advanced Medical research Center Luoyang Central HospitalLuoyang 471099China School of Mechanical and Electronic Engineering Nanjing Forestry UniversityNanjing 210037China Materials Genome institute Shanghai UniversityShanghai 200444China Monash Suzhou research institute Monash UniversitySuzhou 215000China Department of Materials Science and Engineering Monash UniversityClayton VIC 3800Australia research institute of Interdisciplinary Science Dongguan University of TechnologyDongguan 523808China Yangtze Delta Region Academy of Beijing institute of Technology Jiaxing 314019China

Since the superior mechanical,chemical and physical properties of high-entropy alloys(HEAs)were discovered,they have gradually become new emerging candidates for renewable energy *** review presents the novel applications of HEAs in thermoelectric energy ***,the basic concepts and structural properties of HEAs are ***,we discuss a number of promising thermoelectric materials based on ***,the conclusion and outlook are *** article presents an advanced understanding of the thermoelectric properties of HEAs,which provides new opportunities for promoting their applications in renewable energy.

关键词： high-entropy alloys thermoelectric materials thermal conduction

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Growth,leaf anatomy,and photosynthesis of cotton(Gossypium hirsutum L.)seedlings in response to four light-emitting diodes and high pressure sodium lamp

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Journal of Cotton research 2024年第1期7卷 79-89页

作者： ZHANG Yichi LIAO Baopeng LI Fangjun ENEJI AEgrinya DU Mingwei TIAN Xiaoli Engineering research Center of Plant Growth Regulator Ministry of EducationCollege of Agronomy and BiotechnologyChina Agricultural UniversityBeijing 100193China Department of Soil Science Faculty of AgricultureForestryand Wildlife Resources ManagementUniversity of CalabarCalabarNigeria

Background Light is a critical factor in plant growth and development,particularly in controlled ***-emitting diodes(LEDs)have become a reliable alternative to conventional high pressure sodium(HSP)lamps because they are more efficient and versatile in light *** contrast to well-known specialized LED light spectra for vegetables,the appropriate LED lights for crops such as cotton remain *** In this growth chamber study,we selected and compared four LED lights with varying percentages(26.44%–68.68%)of red light(R,600–700 nm),combined with other lights,for their effects on growth,leaf anatomy,and photosynthesis of cotton seedlings,using HSP lamp as a *** total photosynthetic photon flux density(PPFD)was(215±2)μmol·m-2·s-1 for all LEDs and HSP *** results showed significant differences in all tested parameters among lights,and the percentage of far red(FR,701–780 nm)within the range of 3.03%–11.86%was positively correlated with plant growth(characterized by leaf number and area,plant height,stem diameter,and total biomass),palisade layer thickness,photosynthesis rate(Pn),and stomatal conductance(Gs).The ratio of R/FR(4.445–11.497)negatively influenced the growth of cotton seedlings,and blue light(B)suppressed stem elongation but increased palisade cell length,chlorophyll content,and *** The LED 2 was superior to other LED lights and HSP *** had the highest ratio of FR within the total PPFD(11.86%)and the lowest ratio of R/FR(4.445).LED 2 may therefore be used to replace HPS lamp under controlled environments for the study of cotton at the seedling stage.

关键词： Cotton seedling Light-emitting diodes Biomass Palisade cell Photosynthesis

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Efficiency of Bio-Fertilizing as One of the Natural Alternatives to Improve the Growth of Khaya senegalensis and Swietenia mahagoni Trees and for Sustainability

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Agricultural Sciences 2024年第2期15卷 292-310页

作者： Safaa A. S. Ghorab Nashwa H. Mohamed Nader A. El-Shanhorey Nabal S. El-Shahat Amr R. Rabie forestry and Timber Trees Department Horticulture Research Institute Agricultural Research Center Ismailia Egypt forestry and Timber Trees Department Horticulture Research Institute Agricultural Research Center Alexandria Egypt Botanical Gardens Department Horticulture Research Institute Agricultural Research Center Alexandria Egypt forestry and Timber Trees Department Horticulture Research Institute Agricultural Research Center Giza Egypt

A field experiment was carried out at Ismailia research Station, Ismailia Governorate from 2020-2022 to improve the growth of Khaya senegalensis and Swietenia mahagoni by using a combination of mineral fertilizer (NPK) and biological fertilizer (Azotobacter chroococcum, Bacillus megatherium, and Bacillus circulant) as recommended dose under new sandy soils conditions. Split plot designed with four treatments (Control, (50% Mineral fertilizer (M.) + 50% Biological fertilizer (Bio.)), 100% M. and 100% Bio.) of each species. Vegetative growth, leaf area, tree biomass, stored carbon, basal area, tree volume, and in the soil both of microbial account and mineral content were determined. The experimental results showed no significant differences between studied species among the most studied parameters except for Khaya senegalensis which gave the highest significant difference in root biomass and below-stored carbon than Swietenia mahagoni. Evidently, the highest significant growth parameters were 100% mineral fertilizer followed by (50% M. + 50% Bio.) as compared with control. No significant difference between 100% M. and (50% M. + 50% Bio.) of shoot dry biomass (15.19 and 12.02 kg, respectively) and above-stored carbon (0.28 and 0.22 Mt, respectively). Microbial account and mineral content in soil were improved after cultivation of tree species compared to before planting and control, especially with 50% mineral fertilizer and 50% bio-fertilizer treatment. In conclusion, a treatment containing 50% mineral fertilizer and 50% bio-fertilizer has led to the ideal Khaya senegalensis and Swietenia mahagoni growth in sandy soil for cheaper and sustainable.

关键词： Khaya senegalensis Swietenia mahagoni Mineral Fertilizer Bio-Fertilizer Growth Parameters Tree Biomass Stored Carbon Sustainable

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Metal nutrition and transport in the process of symbiotic nitrogen fixation

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Plant Communications 2024年第4期5卷 36-51页

作者： Yuan Li Qian Liu Dan-Xun Zhang Zhuo-Yan Zhang Ao Xu Yuan-Long Jiang Zhi-Chang Chen Haixia institute of Science and Technology Fujian Agriculture and Forestry UniversityFuzhou 350002China These authors contributed equally to this article.

Symbiotic nitrogenfixation(SNF)facilitated by the interaction between legumes and rhizobia is a well-documented and eco-friendly alternative to chemical nitrogen *** plants obtainfixed nitrogen from rhizobia by providing carbon and mineral *** mineral nutrients,which are mostly in the form of metal ions,are implicated in various stages of the SNF *** review describes the functional roles played by metal ions in nodule formation and nitrogenfixation and specifically addresses their trans-port mechanisms and associated transporters within root *** research directions and poten-tial strategies for enhancing SNF efficiency are also discussed.

关键词： metal ion transport legume nodule nitrogenfixation

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Review of the application of in-situ sensing techniques to address the tea growth characteristics from leaf to field

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International Journal of Agricultural and Biological Engineering 2024年第1期17卷 1-11页

作者： Qiong Cao Chunjiang Zhao Ze Xu Ping Jiang Haibin Yang Xiangyu Meng Guijun Yang Information Technology research Center Beijing Academy of Agriculture and Forestry SciencesBeijing 100097China College of Machnical and Electrical Engineering Hunan Agricultural UniversityChangsha 410125China Tea research institute of Chongqing Academy of Agricultural Sciences Chongqing 400000China

The tea plant is a valuable and evergreen crop that is extensively cultivated in China and many other ***,there is growing research interest in this *** the tea industry,it is crucial to develop rapid and non-invasive methods to evaluate tea plants in their natural *** article provides a comprehensive overview of non-invasive sensing techniques used for in-situ detection of tea *** topics covered include leaf,canopy,and field-level assessments,as well as statistical analysis techniques and characteristics specific to the ***-invasive testing technology is primarily used for monitoring and predicting tea pests and diseases,monitoring quality,and nutrients,determining tenderness and grade,identifying tea plant varieties,automatically detecting,and identifying tea buds,monitoring tea plant growth,and extracting tea garden areas through remote *** also helps to evaluate planting suitability,assess disasters,and estimate ***,the article examines the challenges and prospects of emerging techniques aimed at resolving the in-situ detection problem for tea *** can assist researchers and producers in comprehensively understanding the tea environment,quality characteristics,and growth process,thereby enhancing tea production quality,and fostering tea industry development.

关键词： non-destructive in-situ detection tea plants growth characteristics sensors

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Linkage between riverbed scouring or deposition and the evolution of central bars:Case study in the Yangzhong reach of the Yangtze River

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Journal of Geographical Sciences 2024年第7期34卷 1323-1347页

作者： YANG Yunping ZHANG Xiabo FENG Xiaoxiang HAN Jianqiao WANG Jianjun ZHU Yude YANG Yanhua Tianjin research institute for Water Transport Engineering Ministry of TransportTianjin300456China College of Harbour Coastal and Offshore EngineeringHohai UniversityNanjing210098China Northwest Agriculture and forestry University YanglingShaanxi712199China

Understanding the relationship between unbalanced riverbed scouring or deposition and the evolution of central bars in natural conditions and human activity is useful for river regime control and waterway improvement *** this end,we utilized the Yangzhong reach in the lower reaches of the Yangtze River as a case study and evaluated runoff,sediment content,and topographical data measured over the past 70 years(1951–2021).With the decrease in the amount of incoming sediment in the river basin,the Yangzhong reach exhibited a continuous state of *** cumulative riverbed scouring volumes of the low-water and flood channels from 1981 to 2021 were 3.97×10^(8)and 4.14×10^(8)m^(3),respectively,with the riverbed scouring volume of the low-water channel accounting for 95.9%of that of the flood *** quasi-natural runoff–sediment conditions,the evolution of the central bars in the Yangzhong reach was highly correlated with the amount of scouring or *** particular,the Luochengzhou reach could be characterized as a meandering river with scouring on concave riverbanks and deposition on convex *** the context of reduced incoming sediment,the beach area of the Yangzhong reach decreased by approximately 9.9%(from 2003 to 2021)and the central bars of the straight section areas ***,following operation of the Three Gorges Reservoir,both the Luocheng central bar and Jiangyin beach areas could be characterized as meandering rivers with convex riverbanks and *** the quasi-natural period before the implementation of the waterway improvement project,the trend of high scouring intensity and increased fluid diversion ratio in the right branch of the Luocheng central bar was in accordance with the law that the short branch of the length is in a developing state under the condition of decreasing river sediment *** the control of riverbank protection and the construction of waterway improvement projects in the Yangzhong

关键词： riverbed scouring or deposition beach morphology linkage relationship causal analysis tidal reach Yangtze River

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Old Pinus massoniana forests benefit more from recent rapid warming in humid subtropical areas of central-southern China

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Journal of forestry research 2024年第5期35卷 155-170页

作者： Wenxin Li Liangjun Zhu Lianhua Zhu Mengdan Jing Censhi Qian Yu Zhu Paolo Cherubini College of Life Science and Technology Central South University of Forestry and TechnologyChangsha 410004People’s Republic of China Swiss Federal institute for Forest Snow and Landscape Research WSL8903 BirmensdorfSwitzerland Department of Forest and Conservation Sciences Faculty of ForestryUniversity of British Columbia2004-2424 Main MallVancouverBC V6T 1Z4Canada

Trees progress through various growth stages,each marked by specific responses and adaptation strate-gies to environmental *** the importance of age-related growth responses on overall forest health and management policies,limited knowledge exists regarding age-related effects on dendroclimatic relationships in key subtropical tree *** this study,we employed a den-drochronological method to examine the impact of rapid warming on growth dynamics and climatic sensitivity of young(40–60 years)and old(100–180 years)Pinus mas-soniana forests across six sites in central-southern *** normalized log basal area increment of trees in both age groups increased significantly following rapid warming in *** in young forests further showed a distinct growth decline during a prolonged severe drought(2004–2013),whereas those in old forests maintained growth *** growth was more strongly influenced by temperature than by moisture,particularly in old *** tem-peratures strongly and positively impacted the growth of old trees but had a weaker effect on young *** forests had a significantly lower resistance to extreme drought but faster recovery compared to young ***“divergence problem”was more pronounced in younger forests due to their heightened sensitivity to warming-induced drought and heat *** ongoing warming,young forests also may initially experience a growth decline due to their heightened sensitivity to winter *** findings underscore the importance of considering age-dependent changes in forest/tree growth response to warming in subtropical forest man-agement,particularly in the context of achieving“Carbon Peak&Carbon Neutrality”goals in China.

关键词： Tree rings Pinus massoniana Age effects Drought resilience Subtropical forests Rapid warming

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Cu single atoms embedded on hollow g-C_(3)N_(4)nanospheres with enhanced charge transfer and separation for efficient photocatalysis

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Chinese Chemical Letters 2024年第2期35卷 455-459页

作者： Linlin Zhang Jianjun Liao Yakun Li Wei Sun Chengjun Ge Key Laboratory of Agro-forestry Environmental Processes and Ecological Regulation of Hainan Province School of Ecology and EnvironmentHainan UniversityHaikou 570228China Shandong Ocean Chemical Industry Scientific research institute Weifang 262737China

Establishing an effective charge transfer mechanism in carbon nitride(g-C_(3)N_(4))to enhance its photocatalytic activity remains a limiting ***,the combination design of a single Cu atom with hollow g-C_(3)N_(4)nanospheres(Cu-N_(3)structure)has been proven to offer significant opportunities for this crucial ***,this structure endows two pathways for charge transfer in the reaction,namely,the N atoms in the three-dimensional planar structure are only bonded with a single Cu atom,and charge transfer occurs between the plane and the layered structure due to the bending of the interlayered g-C_(3)N_(4)hollow ***,Cu-N_(3)and hollow nanosphere structures have been certified to greatly enhance the efficiency of photogenerated carrier separation and transfer between the layers and planes by ultrafast spectral *** a result,this catalyst possesses unparalleled photocatalytic ***,the hydrogen production rate up to 2040μmol h^(−1) g^(−1),which is 51 times that of pure C_(3)N_(4)under visible light *** photocatalytic degradation performance of tetracycline and oxidation performance of benzene is also expressed,with a degradation rate of 100%,a conversion of 97.3%and a selectivity of 99.9%.This work focuses on the structure-activity relationship to provide the possibilities for the development of potential photocatalytic materials.

关键词： g-C_(3)N_(4) Cu single atom Hollow nanospheres Charge transfer pathways Photocatalytic hydrogen production

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