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The Relationship between Forestland soil Fertility and Gathering Firewood in the Zhuxi watershed in the Red soil Hilly Region of China

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Journal of Mountain Science 2013年第1期10卷 75-83页

作者： CHEN Zhi-qiang CHEN Zhi-biao CHEN Hai-bin YUE Hui College of Geographical Sciences Fujian Normal University soil and water conservation bureau of changting county

Declining soil fertility has become an increasingly urgent problem and gathering firewood is one of the important contributing *** to the excessive exploitation of natural resources especially for firewood,the red soil hilly region has become one of the most vulnerable eco-environment regions in *** pressure of gathering firewood on forestland soil fertility in forestland has been generally estimated by geographical information system and questionnaire method in this paper in the Zhuxi watershed of changting county,Fujian Province,China,a typical representative in the red soil hilly region of *** results of this study show that：i） Forestland soil fertility is negatively affected by gathering firewood,which is more intensive in the integrated buffer zone than out of *** forestland soil fertility grade,OM,total N,available N,total P,available P,total K,available K,pH and ＆lt;2μm clay content are lower and bulk density is higher in the integrated buffer zone than those ***） The forestland soil fertility grade,OM,total N,available N,total P,available P,total K,available K,pH and ＆lt;2μm clay content tend to be lower and bulk density tends to be higher in the village buffer zones than those out in Datian,Chenguang and Youfang ***） The population density,economic development and terrain might be the key driving forces contributing to the relationship between gathering firewood and forestland soil *** population density leads to more massive firewood collection and imposes more pressure on forestland soil *** the use of firewood stove may reduce firewood consumption and thus release the pressure of gathering firewood on forestland soil *** affects the accessibility to gathering firewood thus affects forestland soil *** driving forces influencing the relationship between gathering firewood and forestland soil fertility should also be taken into account in the further study.

关键词： Gathering firewood soil fertility Questionnaire method GIS Zhuxi watershed

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Nutrient Loss from Various Land-Use Areas in Shixia Small watershed of Miyun county, Beijing, China

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Chinese Journal Of Geochemistry 2003年第2期22卷 173-178页

作者：王晓燕王晓峰王振刚汪青平蔡新广 College of Resource Environment & Tourism Capital Normal University soil/water conservation Station of Miyun county

In the Shixia small watershed, twenty experimental plots and two monitoring channels, the residential area and livestock areas were used to monitor the flow, runoff and erosion. Nitrogen and phosphorous concentrations associated with various land uses were analyzed at the same time. The results are presented as follows: (1) TP, TN and COD concentrations of runoff samples in the residential area and livestock areas are nearly 10 times those in other land-use areas. High nutrient loads are associated with village land use, which is due to unsuitable livestock rising. These areas should be treated as the critical areas of non-point source pollution. (2) Different land-use influences intensity the loss of nutrients, especially slope tillings in agricultural land. The amount of nutrient loss from agricultural land per unit is highest, that from forestry is intermediate and that from pastures is lowest. However, in consideration of the variability of land-use areas, agricultural land contributes the greatest to TP and forestry land to TN. (3) The concentrations of TN and TP in sediments from gangues are highest, those in forestry land are intermediate, and those in agricultural land are lowest. Nutrient loss from hilly areas is much greater than from mountainous areas.

关键词：土地利用类型氮磷营养损失北京农业用地土壤侵蚀

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Using live vegetation volume to analyze the effects of plot Pinus massoniana Lamb on water and soil conservation under natural rainfall events

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International Journal of Sediment Research 2013年第4期28卷 579-587页

作者： Zhu-jun GU Xiao-xia WU Xiao-lei WANG Shao-yun PENG Hao LUO Xue-zheng SHI Dong-sheng YU School of Bio-Chemical and Environmental Engineering Nanjing Xiaozhuang University Fujian changting bureau of soil and water conservation Institute of Hydro-geophysical prospecting Chongqing Research Institute of China Coal Technology&Engineering Group Corporation State Key Laboratory of soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of Sciences

The 3-D spatial distributions of vegetation arc of great significance for water and soil conservation but arc rarely concerned in *** live vegetation volume(LVV) was used to relate to water/soil loss under 144 natural erosive rainlall events from 2007 to 2010 in a typical water-eroded area of southern *** polynomial regression models were established for five pure tree(Pinus massoniana Lamb) plots between LVV and water(runoff)/soil conservation effects(RE/SE).RE/SE corresponds to the ratios of runoff depth/soil loss of the pure tree plots to that of the control plot under each rainfall *** LVV exhibits descending(DS),descending-ascending(DA),ascending-descending(AD),and ascending(AS) trends in the LVV-RE and LVV-SE *** effects of soil conservation on the plots were generally more noticeable than the effects of water conservation,and most of the RE and SE values reflected the positive effects of water and soil *** effects were mainly positive under heavy rains(e.g.,rainfall erosivity,R = 140 MJ mm *** 30min intensity,I30= 16 mm h-1),whereas the effects were mainly negative under light rains(e.g.,R = 45 MJ mm ha-1,I30= 8 mm h-1).The trees’ water/soil conservation effects notably transformed when rainfall erosivity and intensity were lower than the positive or negative effects to a certain *** 50%rainfall events led to obvious transform effects when LVVs were near 0.5 or *** results are able to aid in the decision making on the forest reconstruction in water-eroded areas.

关键词： Erosion Forest Runoff Transform live vegetation volume water and soil conservation

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Developing a new red band- SEVI-blue band (RSB) enhancement method for recognition the extra-high-voltage transmission line corridor in green mountains

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International Journal of Digital Earth 2023年第1期16卷 806-824页

作者： Hong Jiang Yong Zhang Jinglan Lin Xiaogan Zheng Hui Yue Yunzhi Chen Key Laboratory of Spatial Data Mining&Information Sharing of Ministry of Education National&Local Joint Engineering Research Center of Satellite Geospatial Information TechnologyAcademy of Digital China(Fujian)Fuzhou UniversityFuzhouPeople’s Republic of China Fujian soil and water conservation Experimental Station FuzhouPeople’s Republic of China Lab of Live Working Tech for Power Transmission Fuzhou Power Supply Company of State Grid Fujian Electric Power Co.Ltd.FuzhouPeople’s Republic of China Fujian(changting)soil and water conservation Research Center Soil and Water Conservation Center of Changting CountyLongyanPeople’s Republic of China

Monitoring the extra-high-voltage transmission line corridor(EHVTLC)in mountains is critical for safe smart-grid ***,the transmission lines are so narrow that they are difficult to recognize using multispectral satellite images with a spatial resolution of 10 *** this study,we developed a new method using the red band–shadow-eliminated vegetation index(SEVI)–blue band(RSB)composite image to enhance the EHVTLC in green mountains(named RSB-enhancement method).Using this method,the EHVTLC becomes evident in the false-color synthesis of the RSB composite of the Sentinel-2 ***,we recognized and extracted approximately 342.45 km of the EHVTLC in a mountainous region of Fuzhou City,China,including a 46.73 km three-parallel-lane segment of 1000 kV and a 295.72 km two-parallel-lane segment of 500 *** analysis shows that the SEVI mean difference between the EHVTLC and the buffer zone reaches approximately 10%,and three landslides and 2.66 km^(2) soil erosion reside in the buffer zone which area is approximately 73.67 km^(2).Finally,the RSB-enhancement method can be used in other satellite images with spatial resolutions of greater than 10 m for enhancement and recognition the transmission line corridors in green mountains.

关键词： Enhancement method shadow-eliminated vegetation index(SEVI) transmission line lane(TLL) green mountains soil erosion

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Seasonal variations in the influence of vegetation cover on soil water on the loess hillslope

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Journal of Mountain Science 2020年第9期17卷 2148-2160页

作者： SHEN Ming-shuang ZHANG Jian-jun ZHANG Shou-hong ZHANG Hai-bo SUN Ruo-xiu ZHANG Yi-zhou School of soil and water conservation Beijing Forestry UniversityBeijing 100083China National Station for Forest Ecosystem Research in Ji county Ji County 042200Shanxi ProvinceChina

soil water is the key factor that restricts the restoration of the local ecological systems in the Loess Plateau of *** the effects of vegetation types on soil water and its seasonal variation helps to understand hydrological characteristics and provides insights into the sustainable restoration of ***,the Caijiachuan watershed was chosen as the research object to investigate the water status of a 0-10 m soil layer under different vegetation types including Pinus tabulaeformis,Robinia pseudoacacia,Platycladus orientalis,apple orchard,natural forestland,farmland and *** comparing the difference between soil water of different land use types and that of grassland during the same period,the seasonal changes of soil water status of different types were *** results show that(1)in the 0-10 m soil layer,the largest value of soil water content was in the0.3-0.4 m layer,and the lowest was in the 5.6-5.8 m *** depths at which the vegetation cover influenced the soil water were up to 10 m;(2)among summer,fall and spring,the soil water storage wasthe highest in the *** addition,the lowest value of relative accumulation was in the fall,which was the period in which the soil water recovered;(3)the soil water in the 0-10 m layer was in a relatively deficient state in the artificial forestlands,apple orchards and native forestlands,while the relative accumulation was in the *** addition,the relative deep soil layers(8-10 m)had more serious deficits in the areas in which ***,*** and the apple orchard grew;(4)during the study period,the farmland in the summer had the largest relative accumulation(182.71 mm),and the land under *** in the fall had the lowest relative deficit(512.20 mm).In the Loess Plateau,vegetation cover will affect the change of deep soil moisture and artificial forest will cause soil water loss in different degrees.

关键词： Seasonal variation soil water Vegetation cover Hillslope Loess Plateau

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Chinese Geographical Science 2014年第4期24卷 414-422页

作者： LI Taijun LIU Guobin College of Forestry Northwest Agriculture and Forestry University Institute of water and soil conservation Chinese Academy of Sciences and Ministry of Water Resources

The effects of reforestation on carbon （C） sequestration in China＇s Loess Plateau ecosystem have attracted much research attention in recent years. Black locust trees （Robinia pseudoacacia L.） are valued for their important use in reforestation and water and soil conservation efforts. This forest type is widespread across the Loess Plateau, and must he an essential component of any planning for C sequestration efforts in this fragile ecological region. The long-term effects of stand age on C accumulation and allocation after reforestation remains uncertain. We examined an age-sequence of black locust forest （5, 9, 20, 30, 38, and 56 yr since planting） on the Loess Plateau to evaluate C accumulation and allocation in plants （trees, shrubs, herbages, and leaf litter） and soil （0-100 cm）. Allometric equations were developed for estimating the biomass of tree components （leaf, branch, stem without bark, bark and root） with a de- structive sampling method. Our results demonstrated that black locust forest ecosystem accumulated C constantly, from 31.42 Mg C/ha （1 Mg = 106 g） at 5 yr to 79.44 Mg C/haat 38 yr. At the ＇old forest＇ stage （38 to 56 yr）, the amount of C in plant biomass significantly decreased （from 45.32 to 34.52 Mg C/ha） due to the high mortality of trees. However, old forest was able to accumulate C continuously in soil （from 33.66 to 41.00 Mg C/ha）. The C in shrub biomass increased with stand age, while the C stock in the herbage layer and leaf litter was age-independent. Reforestation resulted in C re-allocation in the forest soil. The topsoil （0-20 cm） C stock increased constantly with stand age. However, C storage in sub-top soil, in the 20-30, 30-50, 50-100, and 20-100 cm layers, was age-independent. These results suggest that succession, as a temporal factor, plays a key role in C accumulation and re-allocation in black locust forests and also in regional C dynamics in vegetation.

关键词： carbon accumulation carbon allocation soil organic carbon (SOC) reforestation allometric equations black locust forest age-sequence Loess Plateau China

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Effect of gravel content on the detachment of colluvial deposits in Benggang

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Journal of Mountain Science 2022年第11期19卷 3088-3104页

作者： ZHANG Li-ting SHUAI Fang CHEN Li-bo HUANG Yan-he LIN Jin-shi ZHANG Yue GE Hong-li JIANG Fang-shi Jinshan soil and water conservation Research Center Fujian Agriculture and Forestry UniversityFuzhou 350002China

Accurately calculating detachment capacity is the most fundamental issue when establishing a soil erosion process *** deposits of Benggang are typical soil-gravel mixtures,whereas the understanding of the soil detachment of colluvial deposits is *** work investigated the effects of the gravel contents on the soil detachment capacity of colluvial deposits and its hydrodynamic *** colluvial sample was collected in Anxi county,Fujian Province,Southeast China,and a small-sample scouring test was *** slope steepness ranged from 18%to 84%,unit discharge ranged from 0.56×10^(-3)to 2.22×10^(-3)m^(2)s^(-1),and gravel content ranged from 0%to 70%.The results indicated that the gravel content is the primary factor that influences the detachment capacity,followed by the discharge and then the *** detachment capacity trend with the gravel content varied over different slopes and *** power represents the best hydrodynamic parameter for modelling the detachment capacity of colluvial deposits and can be used to establish a fitting equation for the colluvium together with the mean weight diameter(MWD)(Nash-Sutcliffe efficiency(NSE)=0.96).As the gravel content increased,the soil erodibility parameters increased several folds,in some cases more than 10 folds,mainly because the soil shear strength decreased ***,as the gravel content increased,the gravel specific surface area increased,the obstruction of gravel to runoff increased,and the energy needed for runoff to overcome gravel obstruction increased,leading to 2-3 folds higher critical shear stress of runoff for soilgravel mixtures compared with pure *** summary,gravel can influence the detachment capacity by changing the soil properties,and the gravel content also affects the relationship between soil detachment capacity and the hydrodynamic *** findings deepen the understanding of the influence of gravel on soil erosion and provide a basis for

关键词： Hydraulic erosion Hydrodynamics Gravel content soil detachment Erosion resistance Benggang

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Wheat Grain Yield and Yield Stability in a Long-Term Fertilization Experiment on the Loess Plateau

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Pedosphere 2007年第2期17卷 257-264页

作者： HAO Ming-De FAN Jun WANG Quan-Jiu DANG Ting-Hui GUO Sheng-Li WANG Ji-Jun Institute of soil and water conservation Chinese Academy of Sciences Yangling 712100 （China）. State Key Laboratory of soil Erosion and Dryland Farming on the Loess Plateau Institute of Soil and Water Conservation Chinese Academy of Sciences Yangling 712100 （China） Northwest A ＆ F University Yangling 712100 （China）

To provide a scientific basis for sustainable land management, a 20-year fertility experiment was conducted in Changwu county, Shaanxi Province, China to investigate the effects of long-term application of chemical fertilizers on wheat grain yield and yield stability on the Loess Plateau using regression and stability analysis. The experiment consisted of 17 fertilizer treatments, containing the combinations of different N and P levels, with three replications arranged in a randomized complete block design. Nitrogen fertilizer was applied as urea, and P was applied as calcium superphosphate. Fertilizer rates had a large effect on the response of wheat yield to fertilization. Phosphorus, combined with N, increased yield significantly （P 〈 0.01）. In the unfertilized control and the N or P sole application treatments, wheat yield had a declining trend although it was not statistically significant. Stability analysis combined with the trend analysis indicated that integrated use of fertilizer N and P was better than their sole application in increasing and sustaining the productivity of rainfed winter wheat.

关键词： dryland wheat yield long-term fertilization nitrogen phosphorus yield stability

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

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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

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Identification and alleviation pathways of multidimensional poverty and relative poverty in counties of China

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Journal of Geographical Sciences 2021年第12期31卷 1715-1736页

作者： XU Lidan DENG Xiangzheng JIANG Qun'ou MA Fengkui School of soil and water conservation Beijing Forestry UniversityBeijing 100038China Institute of Geographic Sciences and Natural Resources Research CASBeijing 100101China Key Laboratory of soil and water conservation and Desertification Prevention Beijing Forestry UniversityBeijing 100083China

To realize efficient and sustainable poverty alleviation,this study firstly investigated the identification of multidimensional poverty and relative poverty,and then explored relevant poverty alleviation *** levels in 31 provinces including the autonomous regions and municipalities of China were identified at the county level using the average nighttime light index(ANLI),county multidimensional development index(CMDI),and a method combining multidimensional poverty index and relative poverty *** alleviation pathways for poverty-stricken counties were explored from the aspects of industry,education,tourism and *** results revealed that nearly 60% of counties in China were primarily under relative poverty,most of which were corresponded to light relative *** terms of ANLI and CMDI,63% and 79% of the national poverty-stricken counties,as of 2018,could be identified,suggesting that CMDI had a higher performance for identifying poverty at the county *** terms of poverty alleviation pathways,414,172,442,and 298 poverty-stricken counties were receptive to industry poverty alleviation,education poverty alleviation,tourism poverty alleviation,and agriculture poverty alleviation,and 61%of counties had more poverty-causing factors,implying that multidimensional poverty alleviation is suitable in most of the counties.

关键词： nighttime light index multidimensional poverty relative poverty coupling coordination model targeted poverty alleviation

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