吉林农业大学学报2001，Vol.23Issue(2)：9-12，16,5.
玉米群体冠层光合速率与叶面积指数关系的初步研究
Relationship between Leaf Area Index and Photosynthetic Rate of Maize Canopies
摘要
Abstract
Leaf area index (LAI) and net photosynthetic rate (Pn) of maize were measured with an infrared CO2 analyzer in the lax type corn hybrid “Jidan 159", the mid type “Nongda 3138" and the compact type “Simi 25" to study the relationship between LAI and Pn. The results showed that the variations of LAI and Pn of the three varieties were a single peak curve through the whole growth stage at the optimum density with the maximum value at the filling stage. LAI and Pn of “Simi 25" are higher than that of other varieties during the growth stage. Pn of decreases with the increase of LAI. The decrease of Pn was less in “Simi 25" compared with that in “Jidan 159" and “Nongda 3138". Pn of the upper leaves were higher than that of middle leaves and the latter was higher than that of lower leaves. It could be concluded that the suitable LAI and Pn for high yield of maize was 4.5～4.6 and 36.0～39.0 μmol/(m2*s), respectively.关键词
玉米冠层/光合速率/叶面积指数分类
农业科技引用本文复制引用
王珍,武志海,徐克章..玉米群体冠层光合速率与叶面积指数关系的初步研究[J].吉林农业大学学报,2001,23(2):9-12，16,5.
