%0 Journal Article
%T Effects of sand-burial depth on Leymus chinensis seedlings emergence and growth<br>四种沙埋深度对羊草种子出苗和幼苗生长的影响
%A MA Hong-yuan
%A LIANG Zheng-wei
%A YAN Chao
%A CHEN Yuan
%A HUANG Li-hua
%A <br>马红媛
%A 梁正伟
%A 闫超
%A 陈渊
%A 黄立华
%J 生态学杂志
%D 2007
%I 
%X To investigate the effects of burial depth on the Leymus chinensis seedlings emergence and growth under natural conditions,a simulation study was conducted with four sand-burial depths(0,1,2 and 3 cm).The results showed that the seedlings emergence rate decreased with increasing burial depth,being 89.3%,81.5%,78.5% and 73.5% when the burial depths were 0,1,2 and 3 cm,respectively.During the first 25 days of growth,the aboveground plant height was higher in the treatments of 0-2 cm burial depth than in that of 3 cm burial depth,but no significant difference was observed among the four treatments by the end of the experiment(36 days after growth).With the increase of burial depth,the root length and number and the root/shoot ratio increased first but decreased then,leaf number decreased,and seedlings absolute height increased.It could be concluded that a sand-burial depth of 1-2 cm could be more suitable to the L.chinensis seedlings emergence and growth,while the burial depths of 0 and 3 cm could be unfavorable to the emergence and growth.
%K Leymus chinensis
%K seedling emergence percentage
%K seedling
%K sand-burial depth<br>羊草
%K 出苗率
%K 幼苗
%K 沙埋深度
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=B04840A985D251F36078BD07A90EF003&aid=3C7EF3011D6CA020A57B0E8CF8438C01&yid=A732AF04DDA03BB3&vid=96C778EE049EE47D&iid=59906B3B2830C2C5&sid=D43C4A19B2EE3C0A&eid=A732AF04DDA03BB3&journal_id=1000-4890&journal_name=生态学杂志&referenced_num=0&reference_num=25