钾肥不同施用量对耐密型春玉米光合速率和产量的影响

Effect of Potassium Application Rates on Photosynthetic Rate and Yield of Spring Maize

采用田间钾肥定量试验的方法,研究了钾肥不同施用量对春玉米产量性状和产量的影响。研究结果表明:生育期内不同品种叶绿素含量和光合速率的变化趋势相同,均呈单峰变化规律。钾肥主要是通过影响玉米的百粒重、穗粒数和穗长来影响玉米的产量,不同品种间钾肥对产量性状的影响不同,对军单8产量性状影响大小依次为百粒重>穗粒数>穗长,对品种先玉335影响大小依次为穗粒数>穗长>百粒重。

In this study, a quantitative field experiment of potassium was carried out to test the effects of potassium application on yield and grain yield traits of spring maize. The results indicated that in the growth period of maize, it showed the same trend of changes between photosynthetic rate and chlorophyll content at different maize growth stages, and single peak variation. The affect of potassium to maize yield mainly through the influence with 100-kernel weight, grain number and ear length, different effects with different types. In which, the effect on yield traits of Jundan 8 successively was 100-kernel weight 〉 grains per spike 〉 spike length, the effect on yield traits of Xianyu335 successively was grains per spike〉spike length 〉 100-kernel weight.