玉米京科25最佳氮、密配合研究

The Research of N and Planting Density Combination of Hybrid Maize Variety Jingke 25

研究杂交玉米品种京科25的氮、密效应对产量等的影响。结果表明,密度过高严重影响植株发育和产量。通过增加施肥量、提高肥力水平可有效地缓解密度压力。在中高肥力的情况下施氮量为225kg/hm2、密度为60000株/hm2的处理可充分发挥京科25株型半紧凑的特点,对单株产量及其它相关性状十分有利,达到针对性施肥、有效管理和减少投入。

Hybrid maize variety Jingke 25 was tested in four N and five planting density to study the variation on N and planting density combination. The results showed that there was significant difference on plant growth and yield among different planting densities, and counteracted effect by high planting density through increased quantity of N fertilizer. The optimal planting density on medium and fertility soil was 60 000 plants/ha, and the optimal quantity of N 225 kg/ha.