液态种肥点施将肥料呈“点”状精准地施用在种子附近，能减少化肥施用量、提

液态种肥点施将肥料呈“点”状精准地施用在种子附近，能减少化肥施用量、提高肥料利用率。但目前播种时进行液态种肥点施存在喷施过程液态种肥发散与飞溅、高频间歇喷施时供肥压力不稳定和肥-种位置难以精准对应等问题。为此，本文提出了一种液态种肥精准施用方法，重点围绕液态种肥射流点施特性、供肥系统压力调控性能、精准点施控制策略开展研究。

Liquid seed fertilizer spot application the fertilizer is accurately applied near the seeds in a "spot" shape, which can reduce the amount of chemical fertilizer and improve the utilization rate of fertilizer. However, at present, there are some problems in the spot application of liquid seed fertilizer during sowing, such as the divergence and splash of liquid seed fertilizer in the spraying process, the instability of fertilizer supply pressure during high-frequency intermittent spraying, and the difficulty of accurate correspondence between fertilizer and seed position. Therefore, this paper proposes a precise application method of liquid seed fertilizer, focusing on the characteristics of liquid seed fertilizer jet spot application, the pressure regulation performance of fertilizer supply system and the control strategy of precise spot application.

Liquid seed fertilizer spot application can accurately apply fertilizer near seeds in a "spot" shape, which can reduce fertilizer application amount and improve fertilizer utilization rate. However, at present, there are some problems in point application of liquid seed fertilizer during sowing, such as divergence and splash of liquid seed fertilizer during spraying, unstable fertilizer supply pressure during high-frequency intermittent spraying, and difficulty in accurate correspondence between fertilizer and seed position. Therefore, this paper puts forward a precise application method of liquid seed fertilizer, focusing on the characteristics of liquid seed fertilizer jet application, the pressure control performance of fertilizer supply system and the control strategy of precise application.