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Redistribution process of precipitation in ecological restoration activity of Pinus sylvestris *** in Mu Us Sandy Land,China

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International Soil and Water Conservation Research 2023年第3期11卷 572-585页

作者： Yiben Cheng Hongbin Zhan Wenbin Yang Wei Feng Qi Lu Yunqi Wang Qunou Jiang Bin Wang Mingchang Shi Tao Wang Zhiming Xin Ruifang Hao School of Soil and Water Conservation Beijing Forestry UniversityBeijing100083China Yanchi Research Station School of Soil and Water ConservationBeijing Forestry UniversityBeijing100083China Jinyun Forest Ecosystem Research Station School of Soil and Water ConservationBeijing Forestry UniversityBeijing100083China Department of Geology and Geophysics Texas A&M UniversityCollege StationTX77843USA Inner Mongolia Low Coverage Company Hohhot010000China Xilingol Vocational College Xilinhot026000China Desert forestry experimental center Chinese Academy of ForestryDengkou015200China

Precipitation is the most important water resource in semi-arid regions of *** redistribution of precipitation among atmospheric water,soil water and groundwater are related to the land surface afforested ecological *** study took widely replanted Pinus sylvestris ***(PSM)in Mu Us Sandy Land(MUSL)as a research object and monitored precipitation,soil moisture,sap flow,and deep soil recharge(DSR)to find out moisture distribution in shallow soil *** showed that the restoration process of PSM in MUSL changed the distribution of precipitation,with part of it infltrating downward as DsR and part of it being stored in the shallow ***,evapotranspiration increased and DsR significantly decreased,resulting in up to 466.9 mm of precipitation returning to the atmosphere through evapotranspiration in *** increased soil water storage(SwS)capacity,with maximum SWS in PSM plot and bare sandy land(BSL)being 260 mm and 197 mm per unit horizontal area,respectively in *** decreased from 54%of precipitation in the BSL plot to 0.2%of precipitation in the PSM plot in 2016.A great portion of infiltrated water was stored in the PSM ecosystem,resulting in a time lag of infiltration to reach the deep soil layer,and the infiltration rate in the BSL plot was 11 times of that in the PSM *** decreased 16 mm and 7.6 mm per unit horizontal area over a one-year period(from March to October,non-freezing time)in 2017 and 2019,*** PSM annual sap flow was maintained at a relatively constant level of 154 mm/*** in-situ measurement and comparative analysis of the precipitation redistribution of the BSL plot and the PSM plot,we find that PSM can significantly reduce the shallow soil water storage and ***,substantial reduction of shallow soil water storage and DsR is detrimental for the long-term development of PSM ***,it is necessary to reduce PSM density to cut the water consumption by PSM per un

关键词： Three North Shelterbelt project Mu us sandy land Pinus sylvestris varmongolica Precipitation redistribution Deep soil recharge

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Multi-modal knowledge graph inference via media convergence and logic rule

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CAAI Transactions on Intelligence Technology 2024年第1期9卷 211-221页

作者： Feng Lin Dongmei Li Wenbin Zhang Dongsheng Shi Yuanzhou Jiao Qianzhong Chen Yiying Lin Wentao Zhu School of Information Science and Technology Beijing Forestry UniversityBeijingChina Engineering Research center for forestry-oriented Intelligent Information Processing National Forestry and Grassland AdministrationBeijingChina Michigan Technological University HoughtonMichiganUSA

Media convergence works by processing information from different modalities and applying them to different *** is difficult for the conventional knowledge graph to utilise multi-media features because the introduction of a large amount of information from other modalities reduces the effectiveness of representation learning and makes knowledge graph inference less *** address the issue,an inference method based on Media Convergence and Rule-guided Joint Inference model(MCRJI)has been *** authors not only converge multi-media features of entities but also introduce logic rules to improve the accuracy and interpretability of link ***,a multi-headed self-attention approach is used to obtain the attention of different media features of entities during semantic ***,logic rules of different lengths are mined from knowledge graph to learn new entity ***,knowledge graph inference is performed based on representing entities that converge multi-media *** experimental results show that MCRJI outperforms other advanced baselines in using multi-media features and knowledge graph inference,demonstrating that MCRJI provides an excellent approach for knowledge graph inference with converged multi-media features.

关键词： logic rule media convergence multi-modal knowledge graph inference representation learning

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Response of C:N:P in the plant-soil system and stoichiometric homeostasis of Nitraria tangutorum leaves in the oasis-desert ecotone,Northwest China

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Journal of Arid Land 2021年第9期13卷 934-946页

作者： WEI Yajuan DANG Xiaohong WANG Ji GAO Junliang GAO Yan Institute of Desert Control Science and Engineering Inner Mongolia Agricultural UniversityHohhot 010018China Key Laboratory of State Forest Administration for Desert Ecosystem Protection and Restoration Hohhot 010018China Inner Mongolia Hangjin Desert Ecological Research Station Erdos 017400China experimental center of Desert forestry Chinese Academy of ForestryDengkou 015200China

Nitraria tangutorum nebkhas are widely distributed in the arid and semi-arid desert areas of *** formation and development of *** nebkhas are the result of the interaction between vegetation and the surrounding environment in the process of community *** successional stages of *** nebkhas result in differences in the community structure and composition,thereby strongly affecting the distribution of soil nutrients and ecosystem ***,the ecological stoichiometry of *** nebkhas in different successional stages remains poorly *** the stoichiometric homeostasis of *** could provide insights into its adaptability to the arid and semi-arid desert ***,we analyzed the stoichiometric characteristics of *** in four successional stages,i.e.,rudimental,developing,stabilizing,and degrading stages using a homeostasis model in an oasis-desert ecotone of Northwest *** results showed that soil organic carbon(SOC),total nitrogen(TN),and total phosphorus(TP)contents and their ratios in the 0-100 cm soil depth were significantly lower than the averages at regional and global scales and were weakly influenced by successional stages in the oasis-desert *** and TP contents and C:N:P in the soil showed similar *** carbon(TC)and TN contents in leaves were 450.69-481.07 and 19.72-29.35 g/kg,respectively,indicating that leaves of *** shrubs had a high storage capacity for C and *** TC and TN contents and N:P ratio increased from the rudimental stage to the stabilizing stage and then decreased in the degrading stage,while the reverse trend was found for leaf C:*** TP content decreased from the rudimental stage to the degrading stage and changed significantly in late successional stages.N:P ratio was above the theoretical limit of 14,indicating that the growth of *** shrubs was limited by P during successional *** N,P,and N

关键词： nebkhas ecological stoichiometry ecological adaptability successional stages arid area

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Effects of Region and Elevation on Adaptation of Leaf Functional Traits of an Invasive Plant Erigeron annuus in China

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Phyton-International Journal of experimental Botany 2022年第1期91卷 115-128页

作者： Yuanyuan Liu Zhen Li Lie Xu Qiang Fu Yongjian Wang College of Horticulture&forestry Sciences Hubei Engineering Technology Research Center for Forestry InformationHuazhong Agricultural UniversityWuhan430070China

A key scientific challenge relating to the threat of invasive plants on agriculture at the region level is to understand their adaptation and evolution in functional *** functional traits,related to growth and resource utilization,might lead to adaptation of invasive plants to the geographical barriers(region or elevation).In the field experiment,we discussed the effects of region and elevation on leaf functional traits on invasive plant Erigeron annuus in farmland habitats in *** compared leaf size,coefficient of variation(CV)of leaf traits,and fluctuating asymmetry(FA)of *** from three regions(east *** ***)and two leaf types(vegetative *** leaf),and from nine elevations(980-2100 m)in the west region of *** results indicated region and leaf type influenced leaf functional traits,and leaf size was significantly higher and CV of leaf traits and FA in reproductive leaves were significantly lower in the east region than in the west and center *** and leaf type affected leaf functional traits,and leaf size was significantly higher and CV of leaf traits in reproductive leaves were significantly lower in moderate *** has higher leaf size and developmental stability(lower CV and FA)in the eastern region due to the longer adaptation ***,leaf functional traits play an important role in the adaptation of different longitudes and *** can also facilitate the understanding of the invasiveness and adaptation of leaf traits of invasive plants in the agricultural ecosystem during their spread process in China.

关键词： Invasive alien plants(IAS) leaf traits coefficient of variation fluctuating asymmetry developmental stability

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Effects of different culture media on the growth of Indian sandalwood(Santalum album L.) seedlings in Zhanjiang,Guangdong,southern China

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forestry Studies in China 2009年第2期11卷 132-138页

作者： LIU Xiao-jin XU Da-ping XIE Zheng-sheng ZHANG Ning-nan College of forestry South China Agricultural University Guangzhou 510642 P. R. China Research Institute of tropical forestry Chinese Academy of Forestry Guangzhou 510520 E R. China center for Non-Timber Forest Research South China Agricultural University Guangzhou 510642 R R. China

We studied the effects of different culture media on the growth of India sandalwood （Santalum album L.） seedlings in Zhanjiang, Guangdong Province in southern China. Five different growth substrates, lateritic subsoil, burnt soil, agricultural soil, peaty soil and coconut dust, were used as the basic culture materials and seven different treatments of composition were used as potting media. Kuhnia rosmarinifolia Vent. was used as a primary host plant for all treatments. Statistically significant differences were found between treatments in respects of survival rate （p 〈 0.001）, height （p 〈 0.001）, ground diameter （p 〈 0.001） and biomass （p = 0.002）, as well as for quality index （p 〈 0.001） of S. album seedlings after 6-month growth in containers with different culture media. Among all treatments, the treatment combining burnt soil, peat and coconut dust in a weight ratio of 1：1：1 plus 2% calcium super-phosphate as basal manure achieved the best performance for most of the seedling growth parameters, including survival rate （98%）, height （35.81 cm）, ground diameter （0.56 cm）, biomass （4.46 g） and quality index （0.65）, followed by the treatment using only burnt soil plus 2% calcium super-phosphate as the culture medium （survival rate 86%, height 29.23 cm, ground diameter 0.48 cm, biomass 3.36 g and quality index 0.52）, while the treatment using only lateritic subsoil plus the basal manure as the medium obtained the poorest results in survival rate （38%）, height （12.04 cm）, ground diameter （0.19 cm）, biomass （0.26 g） and quality index （0.043）. Increasing the proportion of lateritic subsoil in the medium when mixed with peat and coconut dust did not show statistically significant differences in survival, height, ground diameter, biomass nor in quality index. In consideration of cost, using burnt soil plus 2% calcium super-phosphate as basal manure may be the optimum culture medium for large-scale production of Indian sandal- wood seedlings in Guangdong, southern China.

关键词： Santalum album L. culture medium seedling growth

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Two new species of Eurytoma(Hymenoptera:Eurytomidae),parasitoids of Bradybatus sp.(Coleoptera:Curculionidae)damaging seeds of Acer truncatum in China

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Zoological Systematics 2023年第3期48卷 264-276页

作者： Huihui Liu Liangming Cao Xiaoyi Wang Xuebing Xin Yingxia Bao Zhongqi Yang experimental center of forestry in North China CAF/National Permanent Scientific Research Base for Warm Temperate Zone Forestry of Jiulong Mountain in BeijingBeijing 102300China Ecology and Nature Conservation Institute Chinese Academy of Forestry&Key Laboratory of Forest Protection of National Forestry and Grassland AdministrationBeijing 100091China Wujiaofeng Nature Reserve of Horqinyouyizhongqi Xing'an LeagueInner Mongolia 137400China

Two new species of Eurytoma,*** Yang,Liu&Cao,*** *** Yang,Liu&Cao,***.,are described and illustrated,as the solitary larval and pupal ectoparasitoid of Bradybatus sp.(Coleoptera:Curculionidae),a serious pest of purpleblow maple,Acer truncatum Bunge(Aceraceae).Photographs of the characters of the new species were *** materials were deposited in Insect Museum,Chinese Academy of forestry,*** biological characters observed and their biocontrol potential were also discussed.

关键词： Eurytoma seed-eater parasitoids biological control Acer truncatum

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New contributions to the flora of Myanmar I

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Plant Diversity 2019年第3期41卷 135-152页

作者： Hong-Bo Ding Bin Yang Shi-Shun Zhou Mya Bhone Maw Kyaw Win Maung Yun-Hong Tan Southeast Asia Biodiversity Research Institute & center for Integrative Conservation Xishuangbanna Tropical Botanical Garden Chinese Academy of Sciences Menglun Mengla Yunnan 666303 China Forest Research Institute Forest Department Ministry of Environmental Conservation and Forestry Yezin Nay Pyi Taw 05282 Myanmar

In this study, we describe several new taxa belonging to the flora of Myanmar. One new family, Polyosmaceae (Polyosma wallichii Benn.) is recorded. Over ten new genera are recorded for the first time, including Amentotaxus Pilger (Taxaceae), Hydrobryopsis Engler (Podostemaceae), Cyrtosia Blume and Biermannia King & Pantling (Orchidaceae), Eleutharrhena Forman and Haematocarpus Miers (Menispermaceae), Craigia W.W. Smith & W.E. Evans (Malvaceae), Amblyanthopsis Mez (Primulaceae), Huodendron Rehder and Rehderodendron Hu (Styracaceae), Platea Blume (Metteniusaceae), Achyrospermum Blume (Lamiaceae), Christisonia Gardner (Orobanchaceae). In addition, five new species are described and illustrated: Tupistra natmataungensis Y.H. Tan & H.B. Ding, Biermannia burmanica Y.H. Tan & Bin Yang, Impatiens megacalyx Y.H. Tan & H.B. Ding, Amblyanthopsis burmanica Y.H. Tan & H.B. Ding, Platea kachinensis Y.H. Tan & H.B. Ding. The distribution, ecology, phenology, and conservation status of these new species are also described.

关键词： Polyosmaceae New record genus New species Flora Myanmar

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Tradeoffs of nitrogen investment between leaf resorption and photosynthesis across soil fertility in Quercus mongolica seedlings during the hardening period

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Journal of forestry Research 2024年第6期35卷 185-197页

作者： Zexia Dong Jiaxi Wang Jingfei Chen Guolei Li Yong Liu Yining Li Yufan Zhu Xiaoqian Meng Research center of Deciduous Oaks Beijing Forestry UniversityBeijing 100083People’s Republic of China Key Laboratory for Silviculture and Conservation Ministry of EducationBeijing Forestry UniversityBeijing 100083People’s Republic of China Yiwu Landscaping Greening Bureau Yiwu City 322000People’s Republic of China Beijing Xishan experimental Forest Farm Beijing 100095People’s Republic of China

The most important process before leaf senescence is nutrient resorption,which reduces nutrient loss and maximizes plant fitness during the subsequent growth ***,plants must retain certain levels of nitrogen(N)in their leaves to maintain carbon assimilation during *** objective of this study was to investigate the tradeoffs in N investment between leaf N resorption and N for photosynthesis in seedlings with increased soil fertility during the hardening period.A field experiment was conducted to determine if and how soil fertility treatments(17,34,or 68 mg N seedling−1)affected N resorption and allocation to the photosynthetic apparatus in Quercus mongolica leaves during the hardening *** were sampled at T1(after terminal bud formation),T2(between terminal bud formation and end of the growing period),and T3(at the end of the growing period).Results showed that photosynthetic N content continued to rise in T2,while N resorption started from non-photosynthetic *** N allocation to the photosynthetic apparatus increased as soil fertility increased,delaying N ***,soil fertility significantly affected N partitioning among different photosynthetic components,maintaining or increasing photosynthetic traits during *** study demonstrates a tradeoff in N investment between resorption and photosynthesis to maintain photosynthetic assimilation capacity during the hardening period,and that soil fertility impacts this *** leaves primarily resorbed N from the non-photosynthetic apparatus and invested it in the photosynthetic apparatus,whereas different photosynthetic N component allocations effectively improved this pattern.

关键词： Nitrogen resorption Nitrogen allocation Photosynthetic components Quercus mongolica

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Differential water use strategies among selected rare and endangered species in West Ordos Desert of China

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Journal of Plant Ecology 2017年第4期10卷 660-669页

作者： Jie Chen Qing Xu Deqiang Gao Aiyun Song Yuguang Hao Yingbin Ma Institute of Forest Ecology Environment and Protection Chinese Academy of ForestryNo.1 DongxiaofuXiangshan RoadHaidian DistrictBeijing 100091China Shandong Provincial Key Laboratory of Eco Environmental Science for Yellow River Delta Binzhou UniversityNo.391 Yellow Five RoadBinzhou 256603China experimental center of Desert forestry Chinese Academy of ForestryTuanjie RoadDengkou 015200China

Aims West Ordos Desert(WOD)in Inner Mongolia of China is charac-terized by unique geographical and ecological features to avoid the direct invasion of Quaternary Continental Glaciation,so it hosts many endangered relic species such as Tetraena mongol-ica,Ammopiptanthus mongolicus and Potaninia mongolica from ***,how these plants utilize available water sources remains *** objective of this study was to investigate the water utilization strategies of selected rare and endangered plant species in WOD by comparing hydrogen isotope ratios between their xylem water and possible water sources following four rainfall events of *** We measured the hydrogen isotope ratios of xylem water from ***,*** and *** and an accom-panying species Sarcozygium xanthoxylum and potential water sources(including precipitation and soil water in different soil layers from 0 to 150 cm)over 9 days following each of four varying-intensity rainfall events during the summer of *** then calculated the percentage utilization of potential water sources by each species after each rainfall events using the linear mixing *** also made the measurements of soil moisture and root biomass in favor of interpretation of plant water use *** Findings Tetraena mongolica,*** and *** primarily relied on deep soil water,whereas *** depended predomi-nantly on *** rare and endangered desert plants had differential utilizations of available water sources,so some com-petition for limited water existed among some *** mongolica had a competitive relationship in absorption of soil moisture with the same family species ***,suggesting that *** and *** should be restored separately at different areas in the ***,this study provides a better understanding of water use strategies of these four plants and scien-tific evidence for protecting rare a

关键词： rare species endangered species hydrogen stable isotope water use strategies West Ordos Desert(WOD) varying-intensity rainfall events

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Amur tiger stripes:individual identification based on deep convolutional neural network

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Integrative Zoology 2020年第6期15卷 461-470页

作者： Chunmei SHI Dan LIU Yonglu CUI Jiajun XIE Nathan James ROBERTS Guangshun JIANG Department of Mathematics School of ScienceNortheast Forestry UniversityHarbinChina Feline Research center National Forestry and Grassland AdministrationCollege of Wildlife and Protected AreasNortheast Forestry UniversityHarbinChina Siberian Tiger Park HarbinHeilongjiangChina

The automatic individual identification of Amur tigers(Panthera tigris altaica)is important for population monitoring and making effective conservation *** existing research primarily relies on manual identifi-cation,which does not scale well to large *** this paper,the deep convolution neural networks algorithm is constructed to implement the automatic individual identification for large numbers of Amur tiger *** experimental data were obtained from 40 Amur tigers in Tieling Guaipo Tiger Park,*** number of images collected from each tiger was approximately 200,and a total of 8277 images were *** experiments were carried out on both the left and right side of *** results suggested that the recognition accuracy rate of left and right sides are 90.48%and 93.5%,*** accuracy of our network has achieved the similar level compared to other state of the art networks like LeNet,ResNet34,and ZF_*** running time is much shorter than that of other ***,this study can provide a new approach on automatic individual identification technology in the case of the Amur tiger.

关键词： Amur tiger deep convolutional neural network individual identification stripe feature

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