干旱区生态环境知识资源中心(Arid): Germination and early establishment of dryland grasses and shrubs on intact and wind-eroded soils under greenhouse conditions

Arid

DOI	10.1007/s11104-021-05005-9
	Germination and early establishment of dryland grasses and shrubs on intact and wind-eroded soils under greenhouse conditions
	Niu, Furong; Pierce, Nathan A.; Archer, Steven R.; Okin, Gregory S.
通讯作者	Niu, FR (corresponding author), Univ Arizona, Sch Nat Resources & Environm, Tucson, AZ 85721 USA.
来源期刊	PLANT AND SOIL
ISSN	0032-079X
EISSN	1573-5036
出版年	2021
英文摘要	Aims Grassland-to-shrubland transition is a common form of land degradation in drylands worldwide. It is often attributed to changes in disturbance regimes, particularly overgrazing. A myriad of direct and indirect effects (e.g., accelerated soil erosion) of grazing may favor shrubs over grasses, but their relative importance is unclear. We tested the hypothesis that topsoil winnowing by wind erosion would differentially affect grass and shrub seedling establishment to promote shrub recruitment over that of grass. Methods We monitored germination and seedling growth of contrasting perennial grass (Bouteloua eriopoda, Sporobolus airoides, and Aristida purpurea) and shrub (Prosopis glandulosa, Atriplex canescens, and Larrea tridentata) functional groups on field-collected non-winnowed and winnowed soils under well-watered greenhouse conditions. Results Non-winnowed soils were finer-textured and had higher nutrient contents than winnowed soils, but based on desorption curves, winnowed soils had more plant-available moisture. Contrary to expectations, seed germination and seedling growth on winnowed and non-winnowed soils were comparable within a given species. The N-2-fixing deciduous shrub P. glandulosa was first to emerge and complete germination, and had the greatest biomass accumulation of all species. Conclusions Germination and early seedling growth of grasses and shrubs on winnowed soils were not adversely nor differentially affected comparing with that observed on non-winnowed soils under well-watered greenhouse conditions. Early germination and rapid growth may give P. glandulosa a competitive advantage over grasses and other shrub species at the establishment stage in grazed grasslands. Field establishment experiments are needed to confirm our findings in these controlled environment trials.
英文关键词	Shrub encroachment Chihuahuan Desert grassland Aeolian processes Prosopis glandulosa Bouteloua eriopoda Plant functional group
类型	Article ; Early Access
语种	英语
开放获取类型	Other Gold
收录类别	SCI-E
WOS记录号	WOS:000652911100003
WOS关键词	WOODY-PLANT ENCROACHMENT ; NORTH-AMERICAN GRASSLANDS ; SEED-GERMINATION ; DESERT GRASSLAND ; NEW-MEXICO ; WATER ; NITROGEN ; TEXTURE ; EROSION ; GROWTH
WOS类目	Agronomy ; Plant Sciences ; Soil Science
WOS研究方向	Agriculture ; Plant Sciences
来源机构	University of Arizona ; University of California, Los Angeles
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/352426
作者单位	[Niu, Furong; Pierce, Nathan A.; Archer, Steven R.] Univ Arizona, Sch Nat Resources & Environm, Tucson, AZ 85721 USA; [Okin, Gregory S.] Univ Calif Los Angeles, Dept Geog, Los Angeles, CA 90095 USA
推荐引用方式 GB/T 7714	Niu, Furong,Pierce, Nathan A.,Archer, Steven R.,et al. Germination and early establishment of dryland grasses and shrubs on intact and wind-eroded soils under greenhouse conditions[J]. University of Arizona, University of California, Los Angeles,2021.
APA	Niu, Furong,Pierce, Nathan A.,Archer, Steven R.,&Okin, Gregory S..(2021).Germination and early establishment of dryland grasses and shrubs on intact and wind-eroded soils under greenhouse conditions.PLANT AND SOIL.
MLA	Niu, Furong,et al."Germination and early establishment of dryland grasses and shrubs on intact and wind-eroded soils under greenhouse conditions".PLANT AND SOIL (2021).