%0 Journal Article
%T Study on the Free-grazed Steppes Root Respiration of Growing Season in the Xilin River Basin,China<br>锡林河流域生长季节不同草地类型根系呼吸特征研究
%A LIU Li-xin
%A DONG Yun-she
%A QI Yu-chun
%A <br>刘立新
%A 董云社
%A 齐玉春
%J 环境科学
%D 2006
%I 
%X In order to determine the proportion of the root respiration to the total soil respiration, field experiments were condusted to measured soll respiration in three temperate grassland communities including Leymus chinensis free-grazed steppe, stipa grandis free- grazed steppe and Leymus chinensis degenerated free-grazed steppe using root biomass ratiocination method in the growing season, 2005. At the same time, seasonal variation including root respiration, total soil respiration and proportion of the root respiration to the total soil respiration in different grassland communities were compared, and the influence of root biomass, water and temperature to these processes were expounded. The results indicated that the rule of the root respiration and total soil respiration in the three steps was a one-peak pattern with the season dynamic, the maximum rate was in the late of July, but in Leyrnus chinensls degenerated free-grazed steppe, the rate was obviously larger than the other two types between july and August; The proportion of the root respiration to the total soil respiration obviously changed in the growing season, and the proportion was varied from 40 % -50 % with the mean value of 40.3 %, but it was very different among three steps because of the regional differentiations.
%K root respiration
%K total soil respiration
%K growing season
%K regional differentiations<br>土壤总呼吸
%K 根系呼吸
%K 生长季节
%K 区域差异
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=621EC931847FA20D&yid=37904DC365DD7266&vid=DB817633AA4F79B9&iid=59906B3B2830C2C5&sid=BB80B3A8BBC58235&eid=D0931C7E879194D2&journal_id=0250-3301&journal_name=环境科学&referenced_num=2&reference_num=29