%0 Journal Article
%T Effects of subsoil bulk density on late growth stage photosynthetic characteristics and grain yield of maize (Zea mays L.).<br>下层土壤容重对玉米生育后期光合特性和产量的影响
%A WANG Qun
%A LI Chao-hai
%A HAO Si-ping
%A ZHANG Yong-en
%A HAN Jin-feng
%A <br>王群
%A 李潮海
%A 郝四平
%A 张永恩
%A 韩锦峰
%J 应用生态学报
%D 2008
%I 
%X A pool-culture experiment was conducted to study the effects of different subsoil bulk density at the depths of 20-40 and 40-60 cm on the late growth stage photosynthetic characteristics and grain yield of maize. The results showed that there existed significant differences in the net photosynthetic rate (Pn) and grain yield when the subsoil bulk density was differed. The Pn and grain yield decreased with increasing subsoil bulk density, and the higher the bulk density, the more significant the decrement in Pn and grain yield. The diurnal changes of Pn and intercellular CO2 concentration (Ci) were not in the same trend. Pn was high at noon and low at twilight and dusk, and decreased with increasing subsoil bulk density; while Ci was in adverse. The stomatal limitation (Ls) and stomatal conductance (Gs) also decreased with increasing subsoil bulk density. With the development of maize, the Pn, Ls and Gs, decreased gradually, while Ci increased continuously.
%K 土壤容重
%K 玉米
%K 光合特性
%K 产量
%K 土壤容重
%K 玉米生育进程
%K 生育后期
%K 光合特性
%K 产量
%K 影响
%K maize
%K grain
%K yield
%K photosynthetic
%K characteristics
%K growth
%K stage
%K late
%K bulk
%K density
%K Effects
%K 气孔导度
%K 气孔限制值
%K 变化趋势
%K 浓度
%K 细胞间隙
%K 玉米叶片
%K 处理
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=42FEDDFE54F8BCD9D5FD1926ABDD7722&aid=6DB348BED306D0DBDC83217CBB79DF57&yid=67289AFF6305E306&vid=2A8D03AD8076A2E3&iid=E158A972A605785F&sid=872F6C582A30BA57&eid=8225A9F184D4F1CA&journal_id=1001-9332&journal_name=应用生态学报&referenced_num=1&reference_num=26