论文部分内容阅读
以耐密型玉米辽单565为试验材料,研究不同氮、磷、钾肥配施对其光合特性和产量的影响。结果表明,氮肥试验中,辽单565穗上叶和穗位叶叶面积、穗位叶和穗下叶光合速率均以施氮量为135 kg/hm2时达到较高值,叶面积指数较高,穗位层叶片消光系数较小,产量较高;磷肥试验中,辽单565穗上叶和穗位叶叶面积、穗下叶光合速率均以施磷量为120 kg/hm2时达到较高值,穗位层叶片消光系数较小,产量较高;钾肥试验中,辽单565穗上叶光合速率和穗下叶叶面积均以施钾量为90 kg/hm2时处理较高,穗位层叶片消光系数较小,产量较高。不同氮、磷、钾肥配施试验中,以施氮量180 kg/hm2、施磷量75 kg/hm2、施钾量为90 kg/hm2时辽单565的产量最高。相关分析表明,穗上叶和穗位叶叶面积、穗下叶光合速率与产量均呈极显著正相关,穗位层消光系数与产量呈负相关。
The study was conducted to study the effects of different nitrogen, phosphorus and potassium fertilizers on photosynthetic characteristics and yield of Lidan 565. The results showed that in nitrogen fertilization experiment, the leaf area, ear position and ear position of Liaodong 565 reached a higher value when the nitrogen application rate was 135 kg / hm2, and the leaf area index was higher , The extinction coefficient of earlevel layer leaves was smaller and the yield was higher. In the experiment of phosphate fertilizer, the photosynthetic rate of upper leaf and ear leaf of Liaodong 565 was higher than that of 120 kg / hm2 In the potash experiment, the photosynthetic rate of upper leaves and the area under the leaves of Liao Dang 565 were all higher than those under 90 kg / hm 2 of potassium application. The ear position Layer leaf extinction coefficient is smaller, higher yield. The results showed that the yield of Liaodong 565 was the highest when nitrogen application rate was 180 kg / hm2, phosphorus application rate was 75 kg / hm2, and potassium application rate was 90 kg / hm2. Correlation analysis showed that there was a significant positive correlation between the leaf area above the ear and the ear, the photosynthetic rate under the ear and yield, and the extinction coefficient at the ear layer was negatively correlated with the yield.