据调查,我国氮肥利用率平均仅有28%～41%,磷肥为10%～25%,钾肥为40%～60%。化肥利用率低,其主要原因是养分结构和施肥技术不科学、不合理,造成化肥巨大浪费和生态环境的恶化。若将化肥定量均匀地施入作物根系密集部位,既保证充分吸收,又显著减少肥效的损失,达到充分利用肥效和 According to the survey, China’s average nitrogen utilization rate of only 28% to 41%, phosphate fertilizer is 10% to 25%, potassium 40% to 60%. Fertilizer utilization is low, the main reason is that the nutrient structure and fertilization technology unscientific, unreasonable, resulting in a huge waste of fertilizers and the deterioration of the ecological environment. If the chemical fertilizer evenly applied to dense parts of the crop roots, both to ensure adequate absorption, but also significantly reduce the loss of fertilizer to achieve full use of fertilizer and