检索结果-南通市图书馆

Runoff and Infiltration responses of revegetated slopes to clipping management on the northern Loess Plateau

International soil and water conservation research 2024年第1期12卷 171-183页

作者： Qilin He Binbin Li Fengbao Zhang Nan Shen Mingyi Yang The research center of soil and water conservation and Ecological Environment Chinese Academy of Sciences and Ministry of EducationYanglingShaanxi712100China Institute of soil and water conservation Chinese Academy of Sciences and Ministry of Water ResourcesYanglingShaanxi712100China Institute of soil and water conservation Northwest A&F UniversityYanglingShaanxi712100China water and soil conservation Monitoring center of Ministry of water Resources Beijing100053China University of Chinese Academy of Sciences Beijing100049China

Large-scale vegetation restoration can reduce local watershed water yield,limit vegetation establishment and subsequent growth,and influence regional ecosystem functions.Clipping management by reducing aboveground parts of grassland was gradually recommended and adopted in Grain-for-Green project management to offset these additional issues.Thus,scientific evaluation of the effectiveness of clipping management on infiltration and runoff processes is necessary for maintaining the stability of the surface water system and the sustainability of vegetation restoration in semi-arid regions.A field simulated rainfall experiment was conducted with four managed clipping grasslands(mainly bunge needlegrass and Stipa grandis),including no clipping,light clipping,heavy clipping,and complete clipping under three slope gradients(10,20,and 30°)and three rainfall intensities(60,90,and 120 mm/h)to explore the mechanism of runoff and infiltration responses to clipping using structural equation modeling and variation partitioning based on an SCS-CN model.The results showed the runoff coefficient of the light clipping,heavy clipping,and complete clipping plots were 1.33,2.22,and 4.22 times that of the no clipping plot.The light clipping,heavy clipping,and complete clipping plots decreased the infiltration coefficients by 0%,5%,and 26%relative to the no clipping plot.Rainfall intensity dominated runoff and infiltration amounts,and clipping intensity's total effect was stronger than slope gradient.Clipping intensity and slope gradient were more influential on runoff with increasing rainfall intensity.The mutual inhibition effect was between clipping intensity and slope gradient on runoff.In order to maintain the sustainability of restoration,a 25-50%vegetation coverage after clipping maximizes the benefits of increasing runoff and maintaining enough soil water supply that prevents possible soil drought.We propose that future vegetation restoration policies should evaluate the appropriate clipping intensity;meanwhile,local physiograph

关键词： Runoff Infiltration Grassland clipping management SCS-CN model Structural equation model Variation partitioning

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Influence of physiological and environmental factors on the diurnal variation in emissions of biogenic volatile compounds from Pinus tabuliformis

引用

Journal of Environmental Sciences 2019年第7期31卷 102-118页

作者： Jungang Chen Huaxing Bi Xinxiao Yu Yanlin Fu Wenchao Liao College of soil and water conservation Beijing Forestry University Institute of Ecology College of Urban and Environmental Sciences and Key Laboratory for Earth Surface Processes of the Ministry of Education Peking University Ji County Station Chinese National Ecosystem Research Network (CNERN) Key Laboratory of State Forestry Administration on soil and water conservation Beijing Forestry University Beijing Engineering Research Center of Soil and Water Conservation Beijing Forestry University engineering research center of Forestry Ecological engineering Ministry of Education Beijing Forestry University beijing Collaborative Innovation center for Eco-Environmental Improvement With Forestry and Fruit Trees beijing water Consulting Co. LTD

Biological volatile organic compounds(BVOCs) have a large influence on atmospheric environmental quality, climate change and the carbon cycle. This study assesses the composition and diurnal variation in emission rates of BVOCs from Pinus tabuliformis, using an enclosure technique. Environmental parameters(temperature and light intensity) and physiological parameters(net photosynthetic rate, P_n; stomatal conductance, g_s; intercellular CO_2 concentration, C_i; and transpiration rate, T_r) that may affect emission behavior were continuously monitored. The 10 most abundant compound groups emitted by P. tabuliformis were classified by gas chromatography–mass spectrometry. The dominant monoterpenoid compounds emitted were α-pinene, β-myrcene, α-farnesene and limonene. The diurnal emission rate of BVOCs changed with temperature and light intensity, with dynamic analysis of BVOCs emissions revealing that their emission rates were more affected by temperature than light. The variation in monoterpene emission rates was consistent with estimates of P_n, g_s and T_r. Basal emission rates(at 30 °C,) of the main BVOCs ranged from 0.006 to 0.273 μg^(-1)/(hr g),while the basal ER standardization coefficients ranged from 0.049 to 0.144 °C^(-1). Overall, these results provide a detailed reference for the effective selection and configuration of tree species to effectively prevent and control atmospheric pollution.

关键词： Biogenic volatile organic compounds Pinus tabuliformis Emission rate Monoterpenes

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Response of soil respiration to environmental and photosynthetic factors in different subalpine forest-cover types in a loess alpine hilly region

引用

Journal of Forestry research 2022年第2期33卷 653-665页

作者： Yuanhang Li Sha Lin Qi Chen Xinyao Ma Shuaijun Wang Kangning He School of soil and water conservation Key Laboratory of State Forestry Administration On Soil and Water ConservationBeijing Forestry UniversityBeijing 100083People’s Republic of China Beijing Engineering Research Center of Soil and Water Conservation Beijing Forestry UniversityBeijing 100083People’s Republic of China engineering research center of Forestry Ecological engineering Ministry of EducationBeijing Forestry UniversityBeijing 100083People’s Republic of China North China Power engineering Co. Ltd.of China Power Engineering Consulting GroupChangchun 130021People’s Republic of China Power China Huadong engineering Corporation Limited Hangzhou 311122People’s Republic of China

soil respiration(Rs)is important for transport-ing or fixing carbon dioxide from the atmosphere,and even diminutive variations can profoundly influence the carbon cycle.However,the R_(s) dynamics in a loess alpine hilly region with representative sensitivity to climate change and fragile ecology remains poorly understood.This study investigated the correlation and degree of control between R_(s) and its photosynthetic and environmental factors in five subalpine forest cover types.We examined the correlations between R_(s) and variables temperature(T_(10)) and soil moisture content at 10 cm depth(W_(10)),net photosynthetic rate(P_(n))and soil properties to establish multiple models,and the variables were measured for diurnal and monthly vari-ations from September 2018 to August 2019.The results showed that soil physical factors are not the main drivers of R_(s) dynamics at the diel scale;however,the trend in the monthly variation in R_(s) was consistent with that of T_(10)and P_(n).Further,R_(s) was significantly affected by pH,providing further evidence that coniferous forest leaves contribute to soil acidification,thus reducing R_(s).Significant exponential and linear correlations were established between R_(s) and T_(10)and W_(10),respectively,and R_(s) was positively correlated with P_(n).Accordingly,we established a two-factor model and a three-factor model,and the correlation coefficients(R_(2))was improved to different degrees compared with models based only on T_(10) and W_(10).Moreover,temperature sensitivity(Q_(10))was the highest in the secondary forest and lowest in the Larix principis-rupprechtii forest.Our findings suggest that the control of R_(s) by the environment(moisture and tempera-ture)and photosynthesis,which are interactive or comple-mentary effects,may influence spatial and temporal homeo-stasis in the region and showed that the models appropriately described the dynamic variation in R_(s) and the carbon cycle in different forest covers.In addition,total phosphorus(TP)and total potassium(TK

关键词： Loess alpine hilly region soil respiration Environmental factor Photosynthesis factor Q_(10) Two-factor model Three-factor model

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Overland flow resistance and its components for slope surfaces covered with gravel and grass

引用

International soil and water conservation research 2022年第2期10卷 273-283页

作者： Lan Ma Chengzhong Pan Jingjing Liu Key Laboratory of State Administration of Forestry and Grassland on soil and water conservation School of Soil and Water ConservationBeijing Forestry UniversityBeijing100083China beijing Key Laboratory of Urban Hydrological Cycle and Sponge City Technology College of Water SciencesBeijing Normal UniversityBeijing100875China soil and water conservation Monitoring center of Haihe Basin of Haihe water Resources Commission of the Ministry of water Resources Tianjin300170China

Overland flow resistance plays an important role in predicting hillslope hydrological and erosion pro-cesses on hillslopes.soil surfaces covered with grass and/or gravel may increase hydraulic resistance to overland flow,but there is little information on the determination on these resistance components in a composite slopeland.In this study,the smooth and sand-bed surfaces covered with different gravel or/and grass(cover degree¼2.5%,5%,10%,15%,20%)under five slope gradients(3,6,9,12,15)were subjected to inflows to investigate the hydraulic resistance and validate the sum law of resistance components.The results showed that,the overland flow mainly belonged to transition or turbulent and supercritical flow regime with 150soil and water conservation measures in the rocky and mountainous areas.

关键词： Overland flow Resistance Grass Gravel Sum law

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Size-and leaf age-dependent effects on the photosynthetic and physiological responses of Artemisia ordosica to drought stress

引用

Journal of Arid Land 2021年第7期13卷 744-758页

作者： WANG Chunyuan YU Minghan DING Guodong GAO Guanglei ZHANG Linlin HE Yingying LIU Wei Yanchi research Station School of Soil and Water ConservationBeijing Forestry UniversityBeijing 100083China Key Laboratory of State Forestry Administration on soil and water conservation Beijing Forestry UniversityBeijing 100083China

Drought is one of the most significant natural disasters in the arid and semi-arid areas of China.Populations or plant organs often differ in their responses to drought and other adversities at different growth stages.At present,little is known about the size-and leaf age-dependent differences in the mechanisms of shrub-related drought resistance in the deserts of China.Here,we evaluated the photosynthetic and physiological responses of Artemisia ordosica Krasch.to drought stress using a field experiment in Mu Us Sandy Land,Ningxia Hui Autonomous Region,China in 2018.Rainfall was manipulated by installing outdoor shelters,with four rainfall treatments applied to 12 plots(5 m×5 m).There were four rainfall levels,including a control and rainfall reductions of 30%,50%and 70%,each with three replications.Taking individual crown size as the dividing basis,we measured the responses of A.ordosica photosynthetic and physiological responses to drought at different growth stages,i.e.,large-sized(>0.5 m^(2))and small-sized(≤0.5 m^(2))plants.The leaves of A.ordosica were divided into old leaves and young leaves for separate measurement.Results showed that:(1)under drought stress,the transfer efficiency of light energy captured by antenna pigments to the photosystem II(PSII)reaction center decreased,and the heat dissipation capacity increased simultaneously.To resist the photosynthetic system damage caused by drought,A.ordosica enhanced its free radical scavenging capacity by activating its antioxidant enzyme system;and(2)growth stage and leaf age had effects on the reaction of the photosynthetic system to drought.Small A.ordosica plants could not withstand severe drought stress(70%rainfall reduction),whereas large A.ordosica individuals could absorb deep soil water to ensure their survival in severe drought stressed condition.Under 30%and 50%rainfall reduction conditions,young leaves had a greater ability to resist drought than old leaves,whereas the latter were more resistant to severe drought stress.The response of A.ordos

关键词： drought stress age difference plant size photosynthesis physiological response survival strategy

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The challenge of soil loss control and vegetation restoration in the karst area of southwestern China

引用

International soil and water conservation research 2020年第1期8卷 26-34页

作者： Ligang Zhou Xiangdong Wang Zhaoyan Wang Xiaoming Zhang Cheng Chen Huifang Liu State Key Laboratory of Simulation and Regulation of water Cycle in River Basin China Institute of Water Research and Hydropower ResearchBeijing100048China research center of water and soil conservation Ecological engineering and Technology Beijing100048China

soil loss, both from surface soil loss and subsurface soil leakage, in the karst regions of southwestern China is a serious environmental problem that threatens sustainability in that region. The surface soil loss has been extensively studied, and many studies have been conducted to investigate the causes, impacts and mechanisms involved, but the study of subsurface soil leakage has received little attention due to the difficulties in studying the natural conditions. There is no consensus on the overall proportions between surface soil loss and subsurface soil leakage. To control soil loss, improve ecological restoration, and help locals out of poverty, the Chinese government carried out a series of ecological restoration projects in the karst regions of southwestern China starting in the 1980s. As a result, the intensity and areal extent of soil loss continues to decrease and the ecological situation is steadily improving. However, because of the fragile ecosystem in the karst regions, the soil loss control is a long-term task, and the soil loss in some karst regions continues to be a problem. Subsequently, we put forward some suggestions for the policy makers relative to conservation of soil loss and vegetation restoration. These suggestions include:(1) government, private organizations and individuals are encouraged to raise funds for soil loss control and vegetation restoration;(2) nature reserves should be established to increase biodiversity;(3) engineering projects such as small reservoirs, ponds, and flow diversion channels should be constructed in marginal karst regions.

关键词： Karst soil loss Vegetation restoration Southwestern China

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Effect of vegetation on soil bacteria and their potential functions for ecological restoration in the Hulun Buir Sandy Land,China

引用

Journal of Arid Land 2020年第3期12卷 473-494页

作者： YAN Ru FENG Wei Yanchi research Station School of Soil and Water ConservationBeijing Forestry UniversityBeijing 100083China engineering research center of Forestry Ecological engineering of the Ministry of Education Beijing Forestry UniversityBeijing 100083China

To date,much of research on revegetation has focused on soil microorganisms due to their contributions in the formation of soil and soil remediation process.However,little is known about the soil bacteria and their functions respond to the diverse vegetational types in the process of vegetation restoration.Effects of dominated vegetation,i.e.,Artemisia halodendron Turcz Ex Bess,Caragana microphylla Lam.,Hedysarum fruticosum Pall.and Pinus sylvestris L.on bacterial community structures and their potential functions in the Hulun Buir Sandy Land,China were determined using high-throughput 16S rRNA gene sequencing and phylogenetic investigation of communities by reconstruction of unobserved states(PICRUSt)in 2015.Although the dominant phyla of soil bacterial community among different types of vegetation,including Proteobacteria,Actinobacteria,Acidobacteria,Bacteroidetes and Firmicutes,were similar,the relative abundance of these dominant groups significantly differed,indicating that different types of vegetation might result in variations in the composition of soil bacterial community.In addition,functional genes of bacterial populations were similar among different types of vegetation,whereas its relative abundance was significantly differed.Most carbon fixation genes showed a high relative abundance in P.sylvestris,vs.recalcitrant carbon decomposition genes in A.halodendron,suggesting the variations in carbon cycling potential of different types of vegetation.Abundance of assimilatory nitrate reduction genes was the highest in P.sylvestris,vs.dissimilatory nitrate reduction and nitrate reductase genes in A.halodendron,indicating higher nitrogen gasification loss and lower nitrogen utilization gene functions in A.halodendron.The structures and functional genes of soil bacterial community showed marked sensitivities to different plant species,presenting the potentials for regulating soil carbon and nitrogen cycling.

关键词： bacterial taxonomic composition functional gene vegetational type soil carbon and nitrogen 16S rRNA

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Response of erosion reduction effect of typical soil and water conservation measures in cropland to rainfall and slope gradient changes and their applicable range in the Chinese Mollisols Region,Northeast China

引用

International soil and water conservation research 2023年第2期11卷 251-262页

作者： Qin Zhang Wei Qin Wenhong Cao jian Jiao Zhe Yin Haichao Xu State Key Laboratory of Simulation and Regulation of water Cycle in River Basin China Institute of Water Resources and Hydropower ResearchBejing100048PR China research center on soil and water conservation of the Ministry of water Resources Beijing100048PR China

Mollisols are rich in organic matter,which makes them suitable for cultivation and for enhancing global food security.Mollisols are experiencing severe soil erosion due to overfarming and a lack of mainte-nance.Thus,suitable soil and water conservation measures(SWCMs)are needed to protect Mollisols.However,how SWCMs respond to changes in slope gradient and rainfall and their effective application area remain ambiguous.Using a long-term field observation dataset,meta-analysis,and statistical test methods,we reveal the typical erosion reduction effect of SWCMs and their responses to changes in slope gradient and rainfall.Next,we calculated a coupling factor,P.S,by slope gradient and rainfall in flood season to determine the effective SWCMs application threshold.Compared with bare land,no-tillage(NT),contour ridge tillage(CT),ridge hedgerows(RH),and terraced fields(TF)had an average erosion reduction coefficient of 91.5%.There was a significant exponential increase in the correlation between P.S and the soil erosion amount in plots with typical measures.According to this correlation and soil loss tolerance(200 t/km^(2)),the upper limits of PS(NT:564 mm;CT:885 mm;RH:1135 mm)were determined and utilized to determine the effective application areas(NT:311.40103 km^(2);CT:320.86103 km^(2);RH:323.72103 km^(2))at the plot scale.In wet years,the applicable area of SWCMs declined toward the low-elevation foothills and flat terrain.All the results are applicable when slope length within 20 m.These results provide a basis for the precise allocation of SWCMs in Mollisols area and promote the scientific utilization of Mollisols resources.

关键词： Mollisols region watererosion in cropland soil and water conservationmeasures Erosionreductioncoefficient Effective range

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Effects of biological soil crusts on water infiltration and evaporation Yanchi Ningxia,Maowusu Desert,China

引用

International Journal of Sediment research 2016年第4期31卷 311-323页

作者： Bai Li Jiarong Gao Xiuru Wang Lan Ma Qiang Cui Maik Vest College of soil and water conservation Beijing Forestry University CEBra-center for Energy Technology Brandenburg research center on soil and water conservation of the Ministry of water Resources Department of Sedimentation China Institute of Water Resources and Hydropower Research

Biological soil crusts serve as a vanguard for improving the ecological environment in arid,semi-arid desertification areas.It is a good indicator of the level of improvement which the local ecological environment is undertaking.In desert areas,water condition is a key factor of improving the ecological environment.As a first layer protection,biological crusts play an important role in local vegetation succession due to their abilities to conserve and maintain moisture.Using Maowusu desert in Yanchi of Ningxia province as an example,after three years of research,this paper chooses three kinds of biological crusts including lichen,moss and cyanobacterial which are under the cover of Artemisia ordosica as research objects.The results of this study indicate that,the closer biological crusts are to Artemisia ordosica vegetation,the thicker they become.In the same position of Artemisia ordosica vegetation,the thickness of moss crusts is the highest,followed by lichen crusts,and the thickness of cyanobacterial crusts is the lowest.Biological soil crusts coverage protects the natural water content of soil layers from0 to 5 cm.Also,it effects falling water to infiltrate deeper,and cannot prevent the surface water content from evaporating effectively.The effect of biological crusts blocking water infiltration decreases with the increase of rainfall.At the same rainfall level,moss crusts provide the strongest water infiltration blockage,followed by lichen crusts and cyanobacterial crusts.With the increase of rainfall,the depth of water infiltration increases.At the same rainfall level,the relationship of water infiltration depth is as follows:cyanobacterial crusts > lichen crusts > moss crusts.With the increase of biological crusts thickness,they blocking water infiltration capacity is stronger,and the depth of water infiltration is smaller.Analysis on the characteristic of simulated rainfall process on biological crusts shows that sandy land can be fixed by applying appropriate artificial biological crusts to build a sust

关键词： Lichen crusts Moss crusts Cyanobacterial crusts The thickness of biological crusts Simulated artificial rainfall Desertification area

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

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

引用

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 China.The redistribution of precipitation among atmospheric water,soil water and groundwater are related to the land surface afforested ecological system.The study took widely replanted Pinus sylvestris var.Mongolica(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 layers.Results 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 soil.Consequently,evapotranspiration increased and DsR significantly decreased,resulting in up to 466.9 mm of precipitation returning to the atmosphere through evapotranspiration in 2016.Vegetation 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 2016.DSR 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 plot.SWS 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,respectively.The PSM annual sap flow was maintained at a relatively constant level of 154 mm/yr.Through 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 DSR.However,substantial reduction of shallow soil water storage and DsR is detrimental for the long-term development of PSM forest.Therefore,it is necessary to reduce PSM density to cut the water consumption by PSM per unit area,thus to augment the shallow SWS and DSR,

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

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：