%0 Journal Article
%T EFFECS OF QUADRATE SIZE AND NUMBER ON PRECISION ESTIMATING LITTER AMOUNT OF SECONDARY FOREST<br>样方面积和数量对测定次生林凋落物精度的影响
%A Xiao Yu
%A <br>肖瑜
%J 生态学报
%D 1989
%I 
%X This study is carried out in secondary forest of Betula plctyphylla.Ey analyzing the distribution featines of litter amovnt on forest fleer . it is discovered that there are some characteristics of non-normal distribution , in the intervals (about green weight X ±1.5Sx-) there are some features of uniform distribution for litter amount ,on forest floor. While estanrating litter amount , the required minmum quadrate number is almost the same as quadrate size exceeds 0.5m2 on a 27° hillside. Therefore, it is ...
%K precision estimating litter amount
%K quacdtrate size number
%K determine<br>次生林
%K 凋落物
%K 样方
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=FE163E5DB2274E5937319DE98913EC37&aid=193CD41145C209AD8402841037AD2B71&yid=1833A6AA51F779C1&vid=9CF7A0430CBB2DFD&iid=CA4FD0336C81A37A&sid=6AC2A205FBB0EF23&eid=8BD23BD67BF01A5C&journal_id=1000-0933&journal_name=生态学报&referenced_num=4&reference_num=1