密度对高油玉米HE-2灌浆后期光合特性及产量的影响

Effect of Plant Density on Yield and the Photosynthesis Characteristics of HE-2 in Late Grain Filling Stage

在大田条件下,研究种植密度对高油玉米HE-2灌浆后期光合特性及产量的影响。结果表明,高油玉米HE-2在灌浆后期能保持较高的叶面积和净光合速率,叶面积、叶绿素含量、净光合速率及各荧光参数等均随种植密度增加而降低;子粒产量随种植密度增加先增加后下降,种植密度为52 500～60 000株/hm2时,高油玉米产量较高,最高为6 679.80kg/hm2。

With the field experiment,the effects of different plant densities on yield and the photosynthesis characteristics and of yield high-oil maize HE-2 in late grain filling stage were studied.The results indicated that high-oil maize could keep much more leaf area and net photosynthetic rate.The leaf area,chlorophyll content of leaf,rate of photosynthesis and fluorescence parameters were decreased with increasing of plant density.Grain yield was increased with density increase in range 37 500-52 500 plants/ha,but it was decreased with density increased with density increase in range 52 500-75 000 plants/ha.The density with the highest yield was 6 679.80 kg/ha.