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Organic Matter Enrichment and Aggregate Stabilization in a Severely Degraded Ultisol After reforestation

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Pedosphere 2006年第6期16卷 699-706页

作者： ZHANG Bin PENG Xin-Hua Institute of Soil Science Chinese Academy of Sciences Nanjing 210008China

Three types of soils： an eroded barren soil under continuous fallow, an eroded soil transplanted with Lespedeza shrubs （Lespedeza bieolor）, and an eroded soil transplanted with camphor tree （Cinnaraomum camphora） were investigated to quantify organic matter pools and aggregates in reforested soils using physical fractionation techniques and to determine aggregate stability in relation to the enrichment of soil organic carbon （SOC）. Soil organic matter （SOM） was physically fractionalized into free particulate organic matter （fPOM）, occluded particulate organic matter （oPOM）, and mineralassociated organic matter （mOM）. The SOM was concentrated on the surface soil （0 5 cm）, with an average C sequestration rate of 20-25 g C m^-2 year^-1 over 14 years. As compared to the eroded barren land, organic C content of fPOM, oPOM, and mOM fractions of the soil under Lespedeza and under camphor tree increased 12-15, 45-54, and 3.1-3.5 times, respectively. A linear relationship was found between aggregate stability and organic C （r^2 = 0.45, P 〈 0.01）, oPOM （r^2 = 0.34, P 〈 0.05）, and roOM （r^2 = 0.46, P 〈 0.01） of aggregates. The enrichment of organic C improved aggregate stability of the soil under Lespedeza but not that under camphor tree. However, further research is needed on the physical and biological processes involved in the interaction of soil aggregation and SOC sequestration in ecosystem.

关键词： aggregate stability reforestation organic matter fractions soil C sequestration

Effect of reforestation on annual water yield in a large watershed in northeast China

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Journal of Forestry Research 2015年第3期26卷 697-702页

作者： Yuefeng Yao Tijiu Cai Cunyong Ju Chengxin He Guangxi Key Laboratory of Plant Conservation and Restoration Ecology in Karst Terrain Guangxi Institute of Botany School of Forestry Northeast Forestry University

A simplified water balance model in conjunc- tion with an evapotranspiration （ET） model and cumulative forest cover data were used to quantify the changes in annual water yield in response to reforestation in a large watershed, northeast China. Cumulative forest cover increased by 22 %, leading to a significant decrease in estimated annual water yield. reforestation increased ET （P = 0.0144）, resulting in a remarkable decrease （P = 0.0001） in estimated annual water yield according to the water balance model. reforestation increased ET by 33 mm and decreased annual water yield by 38 mm per decade. The effect of reforestation on annual water yield can be quantified using a simplified water balance model in a large watershed, although our reforestation area was small （about 20 %） in relation to the total watershed area.

关键词： Annual water yield Cumulative forestcover Evapotranspiration (ET) reforestation Water balance model

Characterizing selected soil attributes of different land-use management to assess reforestation benefits of deforested riparian buffers

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Ecological Processes 2018年第1期7卷 467-478页

作者： Velu Rasiah Singarayer K.Florentine Whispering Ridge Drive GuelphOntario N1G 3Z4Canada Centre for Environmental Management School of Health and Life SciencesFederation University AustraliaPO Box 663Mount HelenVIC 3350Australia

Introduction:The information available on the sensitivity of soil biotic and abiotic attributes,which can be used to track the impact of reforestation in riparian buffers,is often insufficient to refine management practices and convince stakeholders of the benefits of ***:In this study,conducted in Victoria,Australia,the changes in soil biotic and abiotic attributes,organic carbon(OC),mineral nitrogen(MN),total dissolved solutes(TDS)and pH were characterised to assess the impact of land-use change from bare riparian(BR)to reforested riparian(RR).Additionally,the benefits of revegetating a deforested creek bank with regard to salinity abatement and C-sequestration potentials were ***:The TDS depletion in the RR strips varied spatiotemporally from 65 to 169 mg/L,the net OC deposition from 16 to 19 g C/kg soil and MN deposition from 1.2 to 2.1 g N/kg soil,***,the net changes in pH from alkaline to near neutral condition varied by 0.4 to 1.0 pH *** 30%to 60%of the net OC depletion after deforestation was redeposited under RR over 3 to 6 *** TDS depletion after land-use changed from BR to RR ranged from 15 to 32%over 3 to 6 ***:The soil attributes OC,MN and TDS characteristics under different land-use practices varied *** information may be useful to convince stakeholders to undertake reforestation of creek banks for salinity abatement,and that change in land-use has the potential to increase C sequestration at a farm scale.

关键词： Creek bank riparian Deforestation reforestation Soil biotic and abiotic attributes Site specificity Temporal changes Carbon sequestration Soil salinity

THE ENVIRONMENTAL CHARACTERISTICS OF FOREST LAND AND THE TECHNIQUES OF reforestation IN FIRED LAND IN DAXING'AN MOUNTAINS

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Journal of Northeast Forestry University 1995年第4期6卷 19-23页

作者：李开隆 Foreslry Institute of Heilongjiang Province

Analysis of nature environmental condition and evalwtion of selection and integration ofteclmiques have been carried out in Daxing’an mountains from 1987. The character of soil generaion in this area is influenced by the frigid, coniferous forest vegetation, weather, glacier and late soil formation process. Syntliesis teclmiques for high yield plantation include high seedling quality,suitable site preparation and eftbctive protectioll measures for yoimg trees.

关键词： Forest land Environmental characteristics Fired land,Techniques of reforestation

The effect of reforestation on stream flow in Upper Nan river basin using Soil and Water Assessment Tool(SWAT)model

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International Soil and Water Conservation Research 2013年第2期1卷 53-63页

作者： Winai Wangpimool Kobkiat Pongput Chinnapat Sukvibool Samran Sombatpanit Philip W.Gassman Department of Water Resources Engineering Faculty of EngineeringKasetsart LniversityBangkok 10900Thailand Land Development Department BangkokThailand World Association of Soil and Water Conservation(WASWAC) BangkokThailand and BeijingChina Center for Agricultural and Rural Development lowa State Lniv.AmesIowaUSA

Forests are an important natural resource,vital to all *** are an important source of food,clothing,and medicines,as well as a place to *** released from forests drains into the soil causing groundwater to emerge as stream flow throughout the *** Thailand,most forests have been encroached by logging,paper production,and housing *** growth and the need for farming area for crop and livestock production have also caused forest *** tools are needed to support the decision makers and planners if they are to achieve objectives of water conservation,and *** technical tools are needed for assistance in the engineering,socio-economic,and environmental *** Soil and Water Assessment Tool(SWAT)was used in the hydrological modeling in this study of the complex and dynamic problems of The Upper Nan river *** was a case study to evaluate the impact of changing conditions in the river basin affected by the stream flow due to *** watershed area was delineated into 5 sub-watersheds based on surface topography provided by the Digital Elevation Model(DEM)and the parameters of each of these watersheds were *** land use data was processed and reclassified to match with the SWAT model land use *** different categories of land use in the study area were used for SWAT *** of land use consist of:mixed forest(33.7%),disturbed forest(30.2%),evergreen forest(17.7%),paddy field(7.1%),orchard(3.7%),range brush(2.7%),field crop(1.7%),planted forest(1.7%),urban(1.4%)and water resources(0.4%).Twenty-two types of soil were found in the *** initial curve number values were assigned based on the land use type and soil hydrologic group for the average antecedent moisture condition of the curve number *** potential evapotranspiration was computed using the Penman-Monteith *** simulation was performed using three reforestation scenarios to assess stream f

关键词： reforestation Stream flow SWAT model Upper Nan river basin Thailand

Soil phosphorus determines the distinct assembly strategies for abundant and rare bacterial communities during successional reforestation

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Soil Ecology Letters 2021年第4期3卷 342-355页

作者： Ziheng Peng Zhifeng Wang Yu Liu Tongyao Yang Weimin Chen Gehong Wei Shuo Jiao State Key Laboratory of Crop Stress Biology in Arid Areas Shaanxi Key Laboratory of Agricultural and Environmental MicrobiologyCollege of Life SciencesNorthwest A&F UniversityYangling 712100China

Uncovering the mechanisms underlying the diversity patterns of abundant and rare species is crucial for terrestrial biodiversity ***,the response of abundant and rare community assembly to ecological succession has not been explored,particularly considering soil *** 300 soil samples were collected from reforestation ecosystems from depths of up to 300 cm and horizontal distances of 30–90 cm from a *** revealed that soil phosphorus not only affected alpha diversity and community structure,but also mediated the balance of stochastic and deterministic processes for abundant and rare sub-communities,which exhibited contrasting assembly *** abundant sub-community changed from variable selection to stochasticity with the increase of phosphorus,while the rare sub-community shifted from homogeneous selection to *** limitation was the main assembly process in the abundant sub-community,while the rare sub-community was governed primarily by homogeneous ***,the relative influence of deterministic processes increased with succession for both *** the scale of a single tree,stochastic processes increased with soil depth in rare sub-community,while deterministic processes increased with the radius from a single tree in the abundant sub***,our results highlight the importance of the soil phosphorus-driven assembly process in understanding the re-assembly and maintenance of soil bacterial diversity.

关键词： Rare bacteria reforestation Soil profiles Community assembly Soil phosphorus Semi-arid

Responses of soil labile organic carbon and water-stable aggregates to reforestation in southern subtropical China

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Journal of Plant Ecology 2021年第2期14卷 191-201页

作者： Yuanqi Chen Yu Zhang Shiqin Yu Feng Li Suping Liu Lixia Zhou Shenglei Fu Hunan Province Key Laboratory of Coal Resources Clean-utilization and Mine Environment Protection Hunan University of Science and TechnologyXiangtan 411201HunanChina Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems South China Botanical GardenChinese Academy of SciencesGuangzhou 510650GuangdongChina Hunan Province Key Laboratory of Economic Crops Genetic Improvement and Integrated Utilization School of Life ScienceHunan University of Science and TechnologyXiangtan 411201HunanChina Key Laboratory of Geospatial Technology for the Middle&Lower Yellow River Regions Ministry of EducationCollege of Environment and PlanningHenan UniversityKaifeng 475004HenanChina

Aims reforestation can enhance soil carbon(C)stability and promote soil C *** results are,however,highly variable,and the efficacy of reforestation in enhancing soil C stability is still in ***,it remains unclear how the different soil C pools respond to reforestation in forest *** The response of different soil C fractions to reforestation was examined in five subtropical forests,including the plantations of Eucalyptus urophylla(EU),Acacia crassicarpa(AC),Castanopsis hystrix(CH)and 10 species mixed(MX),and a naturally recovered shrubland(NS).Soil labile C fractions(readily oxidized organic C by KMnO4:ROC;dissolved organic C:DOC),distribution of aggregate-size classes and aggregate-associated C from different soil layers(0–10,10–20,20–40 and 40–60 cm)were *** Findings We found that reforestation and forest type did not affect ROC concentration,yet the highest DOC concentration was detected in NS at four soil *** C concentration was the highest in all aggregate-size classes of CH at 0–10 cm *** addition,forest type did not alter the proportion of soil water-stable aggregates at four soil ***,soil depths significantly affected the distribution of soil aggregates with>0.25 mm aggregates dominating in the topsoils(0–20 cm),but 0.053–2 mm aggregates being dominant in the deep soils(20–60 cm).These results indicate that reforestation and forest type affected soil DOC(0–60 cm)and aggregate C(0–10 cm).Furthermore,soil DOC and aggregate C were more susceptive to reforestation than *** findings suggest that plantations reduce soil DOC concentration,highlighting that C leaching loss may decrease compared with natural ***,*** plantation may enhance soil C stability by physical protection in *** study provides valuable information on tree species selection for reforestation concerning soil C sequestration in southern subtropical China.

关键词： reforestation carbon stability forest type soil aggregate carbon fraction

Post-Planting Fertilization as a reforestation Aid on a Sulfurous, Semiarid Surface Mine

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Natural Resources 2013年第2期4卷 209-219页

作者： Roger F. Walker Department of Natural Resources and Environmental Science University of Nevada Reno USA

Selected fertilizer formulations were assessed for their capacity to enhance growth and nutrition of Jeffrey pine (Pinus jeffreyi Grev. & Balf.) seedlings on an acidic and possibly toxic Sierran surface mine when applied three years after planting. In a study encompassing five growing seasons conducted on a semiarid, montane surface mine site on the eastern slope of the Sierra Nevada, seedling survival, dimensions, and volume measurements were coupled with foliar and soil analyses for macronutrients, micronutrients, and potentially phytotoxic metallic elements. Administered by broadcasting at four rates each, the formulations consisted of an organic amendment derived from municipal biosolids;a controlled release fertilizer containing urea, ammoniacal, and nitrate N sources;and two conventional fertilizers with one featuring urea as the predominant N form while the other delivered ammoniacal and nitrate forms. None of the formulations induced seedling mortality regardless of application rate, but the controlled release fertilizer and the conventional urea-based formulation were the most stimulatory overall, with intermediate rates of both proving most advantageous among those tested. Foliar analysis revealed that enhanced N and P nutrition, which was otherwise severely impacted by soil infertility, possibly along with that of K, probably accounted for most of the growth stimulation by the amendments, but an accessory role may have been attributable to reduced concentrations of potentially phytotoxic metallic elements, principally Mn but possibly including Fe, Cu, and Al, for which soil levels were all exceedingly elevated. With careful selection of formulation and application rate, post-planting broadcast fertilization can enhance growth and nutrition of Jeffrey pine on degraded substrates. These results provide a more complete understanding of the benefits that judicious fertilization can impart to young forest stands on surface mines and other harsh sites.

关键词： reforestation Forest Restoration Mine Reclamation Forest Fertilization Forest Nutrition Soil Toxicity Jeffrey Pine Pinus jeffreyi

Public Perception on the Success of reforestation in a Degraded Land

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Journal of Agricultural Science and Technology(B) 2015年第6期5卷 422-428页

作者： Budi Utomo Afifuddin Dalimunthe Frans Hutagalung Department of Forest Ecology Forestry Faculty University Sumatra Utara Medan 20155 Indonesia

reforestation is an activity that involves planting or man-made trees regeneration and other plants in the state forest areas and in other areas based on land-use plan designated as forest. The purpose of this study was to determine the public perception of the difficulty of successful reforestation activities in the Lake Toba catchment area. The data were taken from primary and secondary data. Primary data were information collected by reforestation activities in the villages, secondary data were collected in the study site general conditions existing at the village government agencies, of which sampling method was done by purposive sampling, i.e., sampling deliberately chosen. The results showed a lack of socialization in the extension of government reforestation activities, uncontrolled forest fires, lack of maintenance of seed that has been planted, and the type of plant is less suitable.

关键词： reforestation Lake Toba catchment area purposive sampling public perception.