种植密度对玉米干物质积累及经济性状的影响

以玉米品种先玉335(XY335)、郑单958(ZD958)、MC278三个品种为试验材料,对不同种植密度下玉米干物质积累及经济性状差异进行研究,结果表明：不同种植密度下不同玉米品种的单株生物产量、穗长、穗粒数、穗粒重随密度的增加呈下降趋势；单株叶片的干重积累最佳密度为3000-4000株/667m2^；5000-6000株/667m2^单产最高且MC278表现较优。

Effects of Planting Density on Dry Matter Accumulation and Economic Characters of Maize

Using three maize varieties, Xianyu 335 (XY335), Zhengdan 958 (ZD958), and MC278, as experimental materials, the differences in dry matter accumulation and economic traits of maize under different planting densities were studied. The results showed that the biomass per plant, ear length, grain number per ear, and grain weight per ear of different maize varieties under different planting densities decreased with the increase of density; The optimal density for dry weight accumulation of single plant leaves is 3000-4000 plants/667 m2; The unit yield of 5000-6000 plants/667 m2 is the highest and the performance of MC278 is better.