论文部分内容阅读
在昆明市寻甸县清水海水源保护区红壤旱坡地进行夏播油菜平衡施肥试验。结果表明,施氮52.5 kg/hm2使油菜籽产量增加29.49%,且随着施氮量的增加而略有增加,但氮肥的农学效率随着施氮量的增加而降低;施磷30.0 kg/hm2使油菜籽产量增加9.83%,但随着施磷量的增加油菜籽产量趋于下降,磷肥的农学效率降低;施钾60.0 kg/hm2使油菜籽产量增加9.30%,且随着施钾量的增加,油菜籽产量趋于增加,钾肥的农学效率降低。
The balanced fertilization experiment of rape in summer sowing was conducted on the red soil sloping land of Qingshuihai Water Source Conservation Area in Xundian County, Kunming. The results showed that the yield of rapeseed increased by 29.49% at 52.5 kg / hm2 and slightly increased with the increase of nitrogen application rate. However, the agronomic efficiency of nitrogen fertilizer decreased with the increase of nitrogen application rate. The phosphorus application rate of 30.0 kg / hm2 increased the yield of rapeseed by 9.83%, but the yield of rapeseed decreased with the increase of phosphorus application, and the agronomic efficiency of phosphate fertilizer decreased. The yield of rapeseed increased by 9.30% with potassium 60.0 kg / hm2, Increase in yield, rapeseed yield tends to increase, potash agronomic efficiency decreased.