作　　者： ; ; ; ; ;

机构地区： 沈阳农业大学农学院

出　　处： 《玉米科学》 2006年第5期94-97,共4页

摘　　要： 以紧凑型高产玉米品种郑单958为试验材料,用红外气体分析仪和冠层分析仪测定并比较了不同密度下玉米群体的冠层结构和光合特性。结果表明:高产玉米群体的产量增加源于肥水管理与综合栽培技术创建了合理的群体冠层结构,在追求较高的叶面积指数且使之尽早达到最佳状态、减少前期光能漏射损失的同时,保证了叶片维持较长的功能期,尤其在吐丝至乳熟期间。高产玉米群体在大喇叭口期至吐丝期叶面积指数(LAI)为4.0～4.6,乳熟期不低于3.2,吐丝期平均净光合速率(CO2)为31.2μmol/(m2.s)。 The canopy structure and photosynthetic characteristics of maize populations with different densities were contrasting studied with an infrared CO2 analyzer and canopy analyzer in the compact and high yield type Zhengdan 958. The results showed that the increased yield of high yield population belonged to construct the reasonable canopy structure by fertilizer and water control and cultural techniques, the leaf area index was high and came to the best suitable condition early to the full, lessened light losses at development earlier stage, prolonged leaves functional period, especially from flowering stage to milk stage. It could be concluded that the suitable LAI for high yield of maize was 4.0 - 4.6 from malle trail stage to flowering stage and more than 3.2 at milk stage, the net photosynthetic rate（C02） was 31.2μmol/（m2·s） at flowering stage.

关 键 词： 玉米 高产群体 冠层结构 光合特性

领　　域： [农业科学]