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Degree of shade tolerance shapes seasonality of chlorophyll, nitrogen and phosphorus levels of trees and herbs in a temperate deciduous forest

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Journal of Forestry Research 2024年第4期35卷 60-72页

作者： Jiajia Zeng Fan liu Yuan Zhu Jiayi li Ying Ruan Xiankui Quan Chuankuan Wang Xingchang Wang Aulin College Northeast Forestry UniversityHarbin 150040People’s Republic of China Center for Ecological Research Northeast Forestry UniversityHarbin 150040People’s Republic of China Key Laboratory of agricultural Water Resources Center for Agricultural Resources ResearchInstitute of Genetics and Developmental BiologyChinese Academy of SciencesShijiazhuang 050021People’s Republic of China institute of Applied ecology Chinese Academy of SciencesShenyang 110016People’s Republic of China Key Laboratory of Sustainable Forest Ecosystem Management Ministry of EducationNortheast Forestry UniversityHarbin 150040People’s Republic of China

Forest productivity is closely linked to seasonal variations and vertical differentiation in leaf ***,leaf structural and chemical traits variation among co-existing species,and plant functional types within the canopy are poorly *** this study,the seasonality of leaf chlorophyll,nitrogen(N),and phosphorus(P)were quantified vertically along the canopy of four major tree species and two types of herbs in a temperate deciduous *** role of shade tolerance in shaping the seasonal variation and vertical differentiation was *** the entire season,chlorophyll content showed a distinct asymmetric unimodal pattern for all species,with greater chlorophyll levels in autumn than in spring,and the timing of peak chlorophyll per leaf area gradually decreased as shade tolerance *** a:b ratios gradually decreased with increasing shade *** N and P contents sharply declined during leaf expansion,remained steady in the mature stage and decreased again during leaf *** the seasons,the lower canopy layer had significantly higher chlorophyll per leaf mass but not chlorophyll per leaf area than the upper canopy layer regardless of degree of shade ***,N and P per leaf area of intermediate shade-tolerant and fully shade-tolerant tree species were significantly higher in the upper canopy than in the *** variations in N:P ratios suggest changes in N or P *** findings indicate that shade tolerance is a key feature shaping inter-specific differences in leaf chlorophyll,N,and P contents as well as their seasonality in temperate deciduous forests,which have significant implications for modeling leaf photosynthesis and ecosystem production.

关键词： Leaf traits Leaf nutrients Seasonal variations Chlorophyll Nitrogen Phosphorus Shade tolerance Canopy layers

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复合冷冻改良剂对小米老面馒头品质的影响

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粮食与油脂 2024年第9期37卷 41-46,53页

作者：翁金通生庆海刘敬科刘俊利李少辉赵巍河北省农林科学院生物技术与食品科学研究所河北石家庄050051 河北经贸大学生物科学与工程学院河北石家庄050061 河北农业大学食品科技学院河北保定071001

采用冷冻小米老面面团制作馒头,并探究复合冷冻改良剂(海藻酸丙二醇酯、海藻糖、硬脂酰乳酸钠)对馒头品质的影响。通过单因素试验分析了各改良剂在不同添加量下对馒头质构特性和比体积的影响,在此基础上,运用响应面法评估了复合改良剂... 详细信息

采用冷冻小米老面面团制作馒头,并探究复合冷冻改良剂(海藻酸丙二醇酯、海藻糖、硬脂酰乳酸钠)对馒头品质的影响。通过单因素试验分析了各改良剂在不同添加量下对馒头质构特性和比体积的影响,在此基础上,运用响应面法评估了复合改良剂对馒头硬度的影响,并确定了最优的复合改良剂配方。结果显示:最优配方为以小米粉和小麦粉的混合粉质量为基准,海藻酸丙二醇酯添加量0.40%、海藻糖添加量0.80%、硬脂酰乳酸钠添加量0.35%,在此条件下制得的馒头硬度为15.78 N。此外,与空白冻融组相比,添加最优复合改良剂后,面团水分分布稳定性得到保护,表皮颜色未发生显著变化,流变特性更稳定。

关键词：冷冻改良剂馒头质构特性比体积

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树木年轮分析在全球变化研究中的应用

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生态学杂志 2003年第6期22卷 91-96页

作者：于大炮周莉代力民王庆礼刘明国中国科学院沈阳应用生态研究所沈阳农业大学林学院沈阳110161

树木年轮的宽度、密度、图像分析、同位素含量等都与气候因子温度、湿度以及大气成分的变化成复杂的相关关系。本文总结了树木年轮分析的几种主要研究方法以及在全球气候变化、大气污染以及重建大气CO2 浓度中的应用 ,同时利用树木年轮... 详细信息

树木年轮的宽度、密度、图像分析、同位素含量等都与气候因子温度、湿度以及大气成分的变化成复杂的相关关系。本文总结了树木年轮分析的几种主要研究方法以及在全球气候变化、大气污染以及重建大气CO2 浓度中的应用 ,同时利用树木年轮分析对全球变化研究中存在的问题、争议等作了简要的探讨 ,并对未来全球变化中的年轮年代学研究的方向作了展望。

关键词：树木年轮全球变化应用研究

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A CMIP6-based assessment of regional climate change in the Chinese Tianshan Mountains

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Journal of Arid Land 2024年第2期16卷 195-219页

作者： liU Xinyu li Xuemei ZHANG Zhengrong ZHAO Kaixin li Lanhai Faculty of Geomatics Lanzhou Jiaotong UniversityLanzhou 730070China National-Local Joint Engineering Research Center of Technologies and Applications for National Geographic State Monitoring Lanzhou 730070China Gansu Provincial Engineering Laboratory for National Geographic State Monitoring Lanzhou 730070China State Key Laboratory of Desert and Oasis ecology Xinjiang Institute of Ecology and GeographyChinese Academy of SciencesUrumqi 830011China Research Center for ecology and Environment of Central Asia Chinese Academy of SciencesUrumqi 830011China

Climate warming profoundly affects hydrological changes,agricultural production,and human *** and semi-arid areas of China are currently displaying a marked trend of warming and *** Chinese Tianshan Mountains(CTM)have a high climate sensitivity,rendering the region particularly vulnerable to the effects of climate *** this study,we used monthly average temperature and monthly precipitation data from the CN05.1 gridded dataset(1961-2014)and 24 global climate models(GCMs)of the Coupled Model Intercomparison Project Phase 6(CMIP6)to assess the applicability of the CMIP6 GCMs in the CTM at the regional *** on this,we conducted a systematic review of the interannual trends,dry-wet transitions(based on the standardized precipitation index(SPI)),and spatial distribution patterns of climate change in the CTM during *** further projected future temperature and precipitation changes over three terms(near-term(2021-2040),mid-term(2041-2060),and long-term(2081-2100))relative to the historical period(1961-2014)under four shared socio-economic pathway(SSP)scenarios(i.e.,SSP1-2.6,SSP2-4.5,SSP3-7.0,and SSP5-8.5).It was found that the CTM had experienced significant warming and wetting from 1961 to 2014,and will also experience warming in the future(2021-2100).Substantial warming in 1997 was captured by both the CN05.1 derived from interpolating meteorological station data and the multi-model ensemble(MME)from the CMIP6 *** MME simulation results indicated an apparent wetting in 2008,which occurred later than the wetting observed from the CN05.1 in *** GCMs generally underestimated spring temperature and overestimated both winter temperature and spring precipitation in the *** and wetting are more rapid in the northern part of the *** the end of the 21st century,all the four SSP scenarios project warmer and wetter conditions in the CTM with multiple dry-wet ***,the rise in precipitation fails to counterbal

关键词： climate change Coupled Model Intercomparison Project Phase 6(CMIP6) global climate models(GCMs) shared socio-economic pathway(SSP)scenarios standardized precipitation index(SPI) Chinese Tianshan Mountains

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How incubation temperature affects hatchling performance in reptiles: an integrative insight based on plasticity in metabolic enzyme

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Current Zoology 2024年第2期70卷 195-203页

作者： Dan-Yang Wu Xing-Zhi Han Teng li Bao-Jun Sun Xiao-Yan Qin College of life and Environment Sciences Minzu University of ChinaBeijing 100081China Key Laboratory of Animal ecology and Conservational Biology Institute of ZoologyChinese Academy of SciencesBeijing 10011China College of Wildlife and Protected Area Northeast Forestry UniversityHarbin 150040China College of Resources and Environmental Sciences Nanjing Agricultural UniversityNanjing 210095China

Evaluating the effects of temperature variations on animals plays an important role in understanding the threat of climate *** effects of developmental temperature on offspring performance are critical in evaluating the effects of warming temperatures on the fitness of ovipa-rous species,but the physiological and biochemical basis of this developmental plasticity is largely *** this study,we incubated eggs of the turtle Pelodiscus sinensis at low(24℃),medium(28℃),and high(32℃)temperatures,and evaluated the effects of developmental temperature on offspring fitness,and metabolic enzymes in the neck and limb muscles of *** hatchlings from eggs incubated at the medium temperature showed better fitness-related performance(righting response and swimming capacity)and higher activities of metabolic enzymes(hexokinase,HK;lactate dehydrogenase,LDH)than hatchlings from the eggs incubated at high or low *** addition,the swimming speed and righting response were significantly correlated with the HK activities in limb(swimming speed)and neck(righting response)muscles,suggesting that the developmental plasticity of energy metabolic pathway might play a role in determining the way incubation temperature affects offspring *** the fitness-related performance and the activities of metabolic enzymes,we predict that the P sinensis from high latitude would not face the detrimental effects of climate warming until the average nest temperatures reach 32℃.

关键词： developmental plasticity energetic metabolism enzyme activity hatchling turtle.

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Pursuing the goal of carbon neutrality in China:path for realization of carbon sequestration in planted forests

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Frontiers of agricultural Science and Engineering 2024年第3期11卷 355-366页

作者： Lei DENG Haitao HU Jiwei li Xue li Chunbo HUANG Zhijing YU Hailong ZHANG Qing QU Xiaozhen WANG lingbo DONG Zhouping SHANGGUAN State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau Northwest A&F UniversityYangling 712100China College of Soil and Water Conservation Science and Engineering(institute of Soil and Water Conservation) Northwest A&F UniversityYangling 712100China Shaanxi Forestry Survey and Planning institute Xi’an 710000China College of Landscape Architecture Northeast Forestry UniversityHarbin 150040China institute of Soil and Water Conservation Chinese Academy of Sciences and Ministry of Water ResourcesYangling 712100China Key Laboratory of Regional ecology and Environmental Change School of Geography and Information EngineeringChina University of GeosciencesWuhan 430074China

Tree plantations are an important forest resource that substantively contributes to climate change mitigation and carbon *** the area and standing volume of tree plantations in China have increased,issues such as unreasonable structure,low productivity,limited ecological functionality and diminishing ecological stability have occurred,which hinder the ability of tree plantations to enhance carbon *** study outlined the trajectory of carbon sequestration and its associated benefits in tree plantations by examining the current state of tree plantation establishment and growth,elucidated the strategies for advantages of carbon sequestration and climate change mitigation in planted forests,and summarized the existing problems with tree *** paper underscores the pressing need for concerted efforts to boost carbon sequestration within planted forests and proposes management and development strategies for Chinese tree *** the future,it will be necessary to apply scientific theories to practice and develop multi-objective management optimization models for the high-quality development of tree *** will involve establishing a cohesive national carbon trading market,improving the prediction of carbon sequestration,and identifying priority zones for afforestation and reforestation,to better serve China’s national strategy for achieving peak carbon and carbon neutrality.

关键词： Planted forest carbon stock carbon sequestration carbon management climate change promotion path

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Comparison of the water consumption levels of four shelterbelt tree species in a typical arid oasis in Northwest China

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International Journal of agricultural and Biological Engineering 2024年第2期17卷 169-176页

作者： Shuai Fu Bingxian Xu Yufang Leng Yuxin Peng Guogen Tao Lanhai li School of Taxation and Public Administration Jiangxi University of Finance and EconomicsNanchang 330013China Research team of International price analysis and prediction of bulk commodities Jiangxi University of Finance and EconomicsNanchang 330013China School of Foreign Languages Jiangxi University of Finance and EconomicsNanchang 330013China Laboratory of Water Cycle and Water Use in Arid Region Xinjiang Institute of Ecology and GeographyChinese Academy of SciencesUrumqi 830011China Tianshan Snow Cover and Avalanche Observation and Research Station of Xinjiang Xinyuan 835800XinjiangChina

The shelterbelt is an indispensable barrier to the ecological and economic development of an *** moisture,groundwater and irrigation greatly affect the shelterbelt water consumption and *** this study,the transpiration rate of shelterbelt trees,soil moisture and meteorological data were collected to determine the effects of soil moisture and meteorological factors on the water consumption of different shelterbelt tree species via multivariate statistical *** results showed that the water consumption rate was positively correlated with solar radiation,air temperature and ***,the leaf transpiration rate exhibited the trend of *** Jabl.˃***˃*** Carr.>***,while the average daily water consumption decreased in the order of ***>*** Jabl.>*** Carr.>*** average daily water consumption levels of ***,*** Jabl.,*** *** *** were(9.15±0.92)kg/(tree∙d),(6.95±1.41)kg/(tree∙d),(4.43±1.32)kg/(tree∙d),and(1.58±0.18)kg/(tree∙d),*** the growing season,the soil water consumption levels of ***,*** Jabl.,*** Carr.,and *** in each shelterbelt tree stand reached 674.8,336.9,358.1 and 161.7 kg,*** than 96%of the soil moisture lost was provided by the upper 120-cm soil *** the influence and contribution of soil water and meteorological factors to shelterbelt water consumption is beneficial for shelterbelt management and protection.

关键词： water consumption irrigation management shelterbelts soil moisture climatic factors

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Arbuscular mycorrhizal fungi-mediated resistance to salt spray in Cinnamomum camphora seedlings enhanced by leaf functional traits

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Soil ecology Letters 2024年第3期6卷 163-175页

作者： Xiao li Duo Zheng Naili Zhang lijia Dong Aiping Wu Qiqian Wu Hua liu Mingshui Zhao Yan li Xinping Wang Yanhong Wang State Key Laboratory of Subtropical Silviculture Zhejiang A&F UniversityHangzhou 311300China State Key Laboratory of Efficient Production of Forest Resources and the Key Laboratory of Silviculture and Conservation of Ministry of Education Beijing Forestry UniversityBeijing 100083China School of life and Environmental Sciences Shaoxing UniversityShaoxing 312000China ecology Department College of Environment and EcologyHunan Provincial Key Laboratory of Rural Ecosystem Health in Dongting Lake AreaHunan Agricultural UniversityChangsha 410128China Zhejiang Tianmu Mountain National Nature Reserve Administration Hangzhou 311311China

Salt spray is a natural disturbance in coastal *** mycorrhizal fungi(AMF)are recognized as bio-ameliorators of soil salinity in ***,the mechanism through which AMF protects Cinnamomum camphora against aerial salinity remains *** address this knowledge gap,plants were subjected to four fungal regimes,namely sterilized fungal inoculum,Glomus tortuosum,Funneliformis mosseae,or a combination of these two fungi,and exposed to three sprayed-salt regimes(0,7,or 14 mg NaCl cm−2 d−1)in a *** spray significantly decreased photosynthetic capabilities,total dry weight,and salinity tolerance of non-mycorrhizal *** inoculation,particularly a combination of *** and ***,evidently mitigated the detrimental effects induced by salt ***,mycorrhiza-mediated protection depended on the intensity of sprayed salt and the identity of fungal ***,the enhanced resistance of mycorrhizal *** seedlings to aerial salinity was mainly owing to increased leaf thickness and photosynthetic *** findings imply that inoculation with combined fungi could be an optimal strategy for cultivating *** plants in coastal *** results gained hold the potential to offer both theoretical and practical guidance for the managers of coastal ecosystems in soil restoration and conservation.

关键词： arbuscular mycorrhizal fungi leaf thickness photosynthetic capability salinity-tolerance salt spray

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钼酸钠浸种对花生种子萌芽及幼苗生长的影响

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土壤肥料 2003年第4期 29-31,39页

作者：聂呈荣谢惠银温玉辉李梅陈思果黄京华佛山科学技术学院作物遣传育种研究所佛山528231 华南农业大学热带亚热带生态研究所广州510642

本文研究不同浓度钼酸钠浸种对花生种子萌发和幼苗生长的影响。试验结果表明,一定浓度的钼酸钠溶液浸种,对花生种子萌发具有促进作用,可以提高花生种子的发芽率,促进种子胚根的生长。在花生幼苗生长阶段,它能增加叶片叶绿素含量和可溶... 详细信息

本文研究不同浓度钼酸钠浸种对花生种子萌发和幼苗生长的影响。试验结果表明,一定浓度的钼酸钠溶液浸种,对花生种子萌发具有促进作用,可以提高花生种子的发芽率,促进种子胚根的生长。在花生幼苗生长阶段,它能增加叶片叶绿素含量和可溶性蛋白质含量,提高了过氧化氢酶活性和硝酸还原酶活性。实验结果显示,钼酸钠溶液浸种是促进花生种子萌发和幼苗植株生长的重要措施。

关键词：钼酸钠浸种花生种子萌芽幼苗生长产量

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The Scheme for Development of Improved Variety Base of Holly in Jiangxia,Wuhan

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agricultural Science & Technology 2010年第Z2期 194-196+204页

作者： li Wan-de1,WU Wen-jing2,TAN Jian-wen3,ZHOU Ni1 1.Hubei ecology Vocational College,Wuhan 430200 2.Administration Office for Landscaping of Jiangxia District,Wuhan 430200 3.Hubei Provincial Forestry Survey and Design institute,Wuhan 430079

This paper briefly introduced the overview of Jiangxia in Wuhan,and the biological characteristics about holly,then preliminary analyzed the necessity and feasibility about the development of improved variety base of *** also analyzed the benefits from ecology,society and *** addition,it proposed some related suggestion about construction scale,base locations,safeguards and superior tree selections and so *** measures will provide theoretical reference to the development of improved variety base of holly.

关键词： Holly Tree seedlings Development Suggestion

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