%0 Journal Article
%T Simulation model of barley leaf area index.<br>大麦叶面积指数模拟模型
%A 刘铁梅
%A 王燕
%A 邹薇
%A 孙东发
%A 汤亮
%A 曹卫星
%J 应用生态学报
%D 2010
%I 
%X To simulate leaf area index (LAI) accurately is the key for the prediction of crop growth and yield in a crop growth model. Based on the analysis of the dynamic changes in the LAI of high yielding barley cultivars in Wuhan and Yangzhou, a simulation model of barley LAI was established, in which, the LAI was the function of expansion coefficient of LAI for cultivar genetic property, climatic factors such as daily air temperature difference, sunshine hours, and accumulation of photosynthetic available radiation after sowing (∑PAR), and limitation indices of water and nutrients. It was indicated that the maximum LAI and optimal LAI at the stages of booting and heading were not the same conception, but differed significantly. The model was tested by the field experiments with different barley cultivars under different sowing dates and nitrogen application rate s in Yangzhou, Nanjing, and Kunming. The results showed that this model gave thegood predictions of LAI at different development stages, with the RMSE values ranged in 0.742 and 2.865, and averaged 1.348. The simulated and observed LAI values were significantly positively correlated, and the correlation coefficient from y=x regression analysis was between 0.511 and 0.954.
%K barley
%K leaf area index
%K simulation model<br>大麦
%K 叶面积指数
%K 模拟模型
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=42FEDDFE54F8BCD9D5FD1926ABDD7722&aid=A5CD2C405DA958A8B9D2F7092CAC2CAF&yid=140ECF96957D60B2&vid=659D3B06EBF534A7&iid=CA4FD0336C81A37A&sid=CDEBD1ACE0A4C1C1&eid=1F199509C0B6C4D6&journal_id=1001-9332&journal_name=应用生态学报&referenced_num=1&reference_num=0