The Role of Legumes in Plant Community Succession of Degraded Grasslands in Northern China

Legume species were more and more commonly introduced to degraded grassland for human-aided restoration. This study aimed to test whether the natural spread of legume contributes to reversal of grassland degradation through making an extensive grassland vegetation and soil survey in Inner Mongolia of China. The results showed that legume biomass increased along a gradient of soil coarsening that was also a gradient of grassland degradation. The total biomass rather than legume biomass was limited by mean annual precipitation at plot level. The presence of legumes increased species richness in degraded steppe vegetation. Constancy of intermediate and climax species of vegetation succession at sites with legumes was higher than that at sites without legumes, implying that legumes might contribute positively to the reversal of grassland degradation. Our study suggests that naturally distributed legumes could benefit the reversal of grassland degradation through promoting plant community succession rather than total plant biomass. Planting legumes would be an effective measure to accelerate the recovery process of degraded grassland with coarsened soil in regions similar to our study region. Copyright © 2015 John Wiley & Sons, Ltd.

[1]  N. Peinemann,et al.  SOIL DEGRADATION RELATED TO OVERGRAZING IN THE SEMI-ARID SOUTHERN CALDENAL AREA OF ARGENTINA , 2001 .

[2]  E. Aynekulu,et al.  EXCLOSURE LAND MANAGEMENT FOR RESTORATION OF THE SOILS IN DEGRADED COMMUNAL GRAZING LANDS IN NORTHERN ETHIOPIA , 2013 .

[3]  E. Allen,et al.  Ineffectiveness of Two Annual Legumes as Nurse Plants for Establishment of Artemisia californica in Coastal Sage Scrub , 1996 .

[4]  Changing predictors of spatial and temporal variability in stocking rates in a severely degraded communal rangeland , 2012 .

[5]  Anthony J. Parsons,et al.  ECO‐GEOMORPHOLOGICAL PROCESSES WITHIN GRASSLANDS, SHRUBLANDS AND BADLANDS IN THE SEMI‐ARID KAROO, SOUTH AFRICA , 2012 .

[6]  Subodh Kumar Maiti,et al.  SOIL CO2 FLUX IN GRASSLAND, AFFORESTED LAND AND RECLAIMED COALMINE OVERBURDEN DUMPS: A CASE STUDY , 2014 .

[7]  Tsuyoshi Akiyama,et al.  Grassland degradation in China: Methods of monitoring, management and restoration , 2007 .

[8]  W. Schlesinger,et al.  Nutrient losses in runoff from grassland and shrubland habitats in Southern New Mexico: I. rainfall simulation experiments , 1999 .

[9]  G. Asner,et al.  Climatic/edaphic controls on soil carbon/nitrogen response to shrub encroachment in desert grassland. , 2007, Ecological applications : a publication of the Ecological Society of America.

[10]  Hongyan Liu,et al.  Climatic and anthropogenic controls of topsoil features in the semi‐arid East Asian steppe , 2008 .

[11]  Bojie Fu,et al.  Effect of land use on soil nutrients in the loess hilly area of the Loess Plateau, China , 2006 .

[12]  S. González-Prieto,et al.  Assessing and modeling the role of the native legume Lupinus meridanus in fertility restoration in a heterogeneous mountain environment of the tropical Andes , 2012 .

[13]  I. Burke,et al.  LEGUME, GRASS, AND CONSERVATION RESERVE PROGRAM EFFECTS ON SOIL ORGANIC MATTER RECOVERY , 1997 .

[14]  E. Veldkamp,et al.  Effectiveness of exclosures to restore degraded soils as a result of overgrazing in Tigray, Ethiopia , 2007 .

[15]  H. Tiessen,et al.  Effect of Land Use on Soil Degradation in Alpine Grassland Soil, China , 2002 .

[16]  D. Hooper,et al.  Overyielding among plant functional groups in a long‐term experiment , 2003 .

[17]  P. Reich,et al.  The Influence of Functional Diversity and Composition on Ecosystem Processes , 1997 .

[18]  Yu Li,et al.  Soil Properties and their Spatial Pattern in a Degraded Sandy Grassland under Post-grazing Restoration, Inner Mongolia, Northern China , 2006 .

[19]  P. Vlek,et al.  Application of the caesium‐137 technique to soil degradation studies in the Southwestern Highlands of Ethiopia , 2012 .

[20]  Debra P. C. Peters,et al.  High-resolution images reveal rate and pattern of shrub encroachment over six decades in New Mexico, U.S.A. , 2003 .

[21]  G. Chaer,et al.  Nitrogen-fixing legume tree species for the reclamation of severely degraded lands in Brazil. , 2011, Tree physiology.

[22]  A. Fterich,et al.  THE EFFECTS OF ACACIA TORTILIS SUBSP. RADDIANA, SOIL TEXTURE AND SOIL DEPTH ON SOIL MICROBIAL AND BIOCHEMICAL CHARACTERISTICS IN ARID ZONES OF TUNISIA , 2014 .

[23]  J F Reynolds,et al.  Biological Feedbacks in Global Desertification , 1990, Science.

[24]  Gang Wang,et al.  Effect of legume species introduction to early abandoned field on vegetation development , 2007, Plant Ecology.

[25]  C. Porqueddu,et al.  Exploitation of Annual and Perennial Herbaceous Species for the Rehabilitation of a Sand Quarry in a Mediterranean Environment , 2016 .

[26]  B. Cade,et al.  A gentle introduction to quantile regression for ecologists , 2003 .

[27]  C. Martínez-Garza,et al.  Recovery of Soil C and N in a Tropical Pasture: Passive and Active Restoration , 2015 .

[28]  A. Cerda,et al.  Spatial models for monitoring the spatio-temporal evolution of ashes after fire – a case study of a burnt grassland in Lithuania , 2013 .

[29]  G. Perry,et al.  QUANTITATIVE ASSESSMENT OF DEGRADATION CLASSIFICATIONS for DEGRADED ALPINE MEADOWS (HEITUTAN), SANJIANGYUAN, WESTERN CHINA , 2014 .

[30]  Sam Drake,et al.  Desertification processes due to heavy grazing in sandy rangeland, Inner Mongolia , 2005 .

[31]  J. Dengler,et al.  Species constancy depends on plot size – a problem for vegetation classification and how it can be solved , 2009 .

[32]  A. Rango,et al.  Object-oriented image analysis for mapping shrub encroachment from 1937 to 2003 in southern New Mexico , 2004 .

[33]  A. Troumbis,et al.  The role of legumes as a component of biodiversity in a cross‐European study of grassland biomass nitrogen , 2002 .

[34]  H. Howe,et al.  DROUGHT MORTALITY OF TREE SEEDLINGS IN AN ERODED TROPICAL PASTURE , 2013 .

[35]  J. Ni,et al.  Estimating net primary productivity of grasslands from field biomass measurements in temperate northern China , 2004, Plant Ecology.

[36]  W. Yong,et al.  A landscape-scale assessment of steppe degradation in the Xilin River Basin, Inner Mongolia, China , 2004 .

[37]  I. Kögel‐Knabner,et al.  Grazing effects on soil chemical and physical properties in a semiarid steppe of Inner Mongolia (P.R. China) , 2008 .

[38]  Yu Li,et al.  Changes in Soil Properties After Establishment of Artemisia halodendron and Caragana microphylla on Shifting Sand Dunes in Semiarid Horqin Sandy Land, Northern China , 2005, Environmental management.

[39]  Jianhui Huang,et al.  Primary production and rain use efficiency across a precipitation gradient on the Mongolia Plateau. , 2008, Ecology.

[40]  C. Campbell,et al.  Soil microbial populations and activities as influenced by legume green fallow in a semiarid climate , 2005 .

[41]  He Jinsheng,et al.  Above- and belowground biomass in relation to envi-ronmental factors in temperate grasslands, Inner Mongolia , 2008 .

[42]  K. Hibbard,et al.  BIOGEOCHEMICAL CHANGES ACCOMPANYING WOODY PLANT ENCROACHMENT IN A SUBTROPICAL SAVANNA , 2001 .

[43]  D. Tilman,et al.  Plant functional composition influences rates of soil carbon and nitrogen accumulation , 2008 .

[44]  P. Reich,et al.  Diversity and Productivity in a Long-Term Grassland Experiment , 2001, Science.

[45]  R. Bardgett,et al.  Differential Effects of Legume Species on the Recovery of Soil Microbial Communities, and Carbon and Nitrogen Contents, in Abandoned Fields of the Loess Plateau, China , 2012, Environmental Management.

[46]  Francisco M. Padilla,et al.  The role of nurse plants in the restoration of degraded environments , 2006 .

[47]  C. Wang,et al.  Changes in plant diversity, biomass and soil C, in alpine meadows at different degradation stages in the headwater region of three rivers, China , 2009 .

[48]  A. Angassa.  EFFECTS OF GRAZING INTENSITY AND BUSH ENCROACHMENT ON HERBACEOUS SPECIES AND RANGELAND CONDITION IN SOUTHERN ETHIOPIA , 2014 .

[49]  Yong-zhong Su,et al.  Influences of continuous grazing and livestock exclusion on soil properties in a degraded sandy grassland, Inner Mongolia, northern China , 2005 .

[50]  Legume, cropping intensity, and N-fertilization effects on soil attributes and processes from an eight-year-old semiarid wheat system , 2015, Nutrient Cycling in Agroecosystems.