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以玉米中熟种苏玉9号为材料,通过施氮量和种植密度处理,研究群体根系伤流强度动态和节根组成与物质积累、产量构成的关系.结果表明:玉米群体气生根数与节根量、灌浆结实期根系伤流强度、总粒数、抽丝后干物质积累量及产量呈正相关.生育过程中抽丝期的群体根系伤流量强度与抽丝后于物质积累量、总干物质积累量及籽粒产量相关最密切.气生根的多少和抽丝期根系伤流强度的高低可作为玉米高产栽培群体质量的诊断指标.
Maize cultivar Suyu 9 was used to study the dynamic of root trauma flow and the relationship between root nodule accumulation and material accumulation and yield components in the population.The results showed that: Root weight, root bleeding intensity at the filling stage, total grain number, dry matter accumulation after spinning and yield were positively correlated.The strength of root trauma and the accumulation of material after spinning Dry matter accumulation and grain yield were the most closely correlated.The amount of airy roots and root bleeding intensity during the spinning stage could be used as a diagnostic index for the quality of high yielding corn populations.