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Authors Zhao, X; Zhu, HS; Dong, KH; Li, DY
Author Full Name Zhao, Xiang; Zhu, Huisen; Dong, Kuanhu; Li, Deying
Title Plant Community and Succession in Lowland Grasslands under Saline-Alkali Conditions with Grazing Exclusion
Source AGRONOMY JOURNAL
Language English
Document Type Article
Keywords Plus QINGHAI-TIBETAN PLATEAU; ALASKAN SALT-MARSH; MONGOLIAN RANGELANDS; INNER-MONGOLIA; SOIL-SALINITY; CHINA; VEGETATION; DEGRADATION; PRODUCTIVITY; ZONATION
Abstract Rangeland degradation poses a serious environmental and economic problem in northern China. This study investigated soil conditions and plant community patches prior to and after grazing exclusion in Youyu County, Shanxi Province. The soil at this site has a pH of 8.2 to 10.1 and electrical conductivity of 0.4 to 5.9 dS m(-1). With the exception of bare patches, the patches were named after the dominant species, that is, Artemisia anethifolia Weber ex Stechm. (AA), Phragmites australis (Cav.) Trin. ex Steud. (PA), Puccinellia distans (Jacq.) Parl. (PD), Chloria virgate Sw. (CV), and Leymus secalinus (Georgi) Tzvel. (LS) with increasing biomass production, Shannon-Wiener index (H'), evenness index (V'), degree of succession (Ds), and patch shape parameters. Canonical correlation analysis was used to explain the relationships between soil variables and biological, and between soil variables and shape variables of the community patches. The soil canonical variable was represented by soil moisture, organic matter, and bulk density with a standardized canonical coefficient of 1.09, 0.79, and -0.69, respectively. The plant canonical variable was represented by biomass production with correlation coefficient of 0.96 (P = 0.0021). A total of 73.0% of the variance standardizing the measuring units of the plant variables were explained by the soil canonical variable, indicating that the first latent soil variable could be used to predict the latent plant variable. Open grazing (90% biomass removal) contributed to the deterioration of the grassland. Over a 2-yr period, grazing exclusion did not increase the H' but it did increase biomass production. Therefore, correcting soil problems is needed in addition to reducing the grazing stock.
Author Address [Zhao, Xiang; Zhu, Huisen; Dong, Kuanhu] Shanxi Agr Univ, Coll Anim Sci & Vet Med, Taigu 030801, Shanxi, Peoples R China; [Li, Deying] North Dakota State Univ, Dept Plant Sci, Bolley Dr, Fargo, ND 58108 USA
Reprint Address Li, DY (reprint author), North Dakota State Univ, Dept Plant Sci, Bolley Dr, Fargo, ND 58108 USA.
E-mail Address deying.li@ndsu.edu
Times Cited 1
Total Times Cited Count (WoS, BCI, and CSCD) 1
Publisher AMER SOC AGRONOMY
Publisher City MADISON
Publisher Address 677 S SEGOE RD, MADISON, WI 53711 USA
ISSN 0002-1962
29-Character Source Abbreviation AGRON J
ISO Source Abbreviation Agron. J.
Publication Date SEP-OCT
Year Published 2017
Volume 109
Issue 5
Beginning Page 2428
Ending Page 2437
Digital Object Identifier (DOI) 10.2134/agronj2016.12.0734
Page Count 10
Web of Science Category Agronomy
Subject Category Agriculture
Document Delivery Number FJ3BR
Unique Article Identifier WOS:000412605600059
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