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JOURNAL OF DESERT RESEARCH  2008, Vol. 28 Issue (2): 312-317    DOI:
生物土壤与生态     
Effect of Different Improving Measures on Degenerated Steppe of Leymus chinensis
YANG Li-na; BAOYIN Taogetao
College of Life Science, Inner Mongolia University, Hohhot 010021, China
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Abstract  Study on comparison of community characteristics of degenerated Leymus chinensis steppe treated respectively by different improving measures such as adding seeding Leymus chinensis, harrowing, and fencing from grazing in 1983 was conducted. The results showed that their soil conditions are different although after 23 years restoration: the soil bulk density is the least and the moisture content is the highest after harrowing; the yield increasing effect of the three measures all are remarkable: compared with the CK, the community biomass after reseeding Leymus chinensis, harrowing and fencing are increased by 127.30%, 146.64%, 138.04%, respectively; the rhizome grasses take a large percent in the community after reseeding Leymus chinensis or harrowing, whereas the bunch grasses take a large percent in the fenced or outside fencing; among the three treatment measures, the harrowing produces the highest diversity index; community outside the fence has the highest evenness index. In conclusion, the effect of harrowing last the longest time, and that of the other two measures still exist.
Key words:  degenerated Leymus chinensis steppe      improving measures      functional group composition      diversity index     
Received:  02 April 2007      Published:  20 March 2008
ZTFLH:  S812.8  
Articles by authors
YANG Li-na
BAOYIN Taogetao

Cite this article: 

YANG Li-na;BAOYIN Taogetao. Effect of Different Improving Measures on Degenerated Steppe of Leymus chinensis. JOURNAL OF DESERT RESEARCH, 2008, 28(2): 312-317.

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http://www.desert.ac.cn/EN/     OR     http://www.desert.ac.cn/EN/Y2008/V28/I2/312

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