The rising fertilizer prices and ecological concerns over chemical pollutants in drinking water sources have pushed precision agriculture and site-specific management to the forefront.The agricultural sector is seeking ways to optimize crop yields while minimizing fertilizer use in response to the increasing costs of fertilizer production.However,accurate determination of soil nitrogen(N),phosphorus(P),and potassium(K)content still relies primarily on labor-intensive manual sampling and laboratory analysis,hindering the advancement of intelligent fertilization.To address this,researchers both domestically and internationally are focusing on sensor technologies for rapid soil nutrient assessment.This paper reviews current studies on spectroscopic and electrochemical techniques,finding that while these methods can accurately measure soil NPK content under controlled conditions,they face significant challenges in complex field environments and cannot yet achieve autonomous measurement.Future research needs to delve into soil conditions,light compensation,and automated operations to develop real-time,in situ NPK detection systems.
关键词
土壤氮磷钾/配方施肥/传感测定/光谱
Key words
soil nitrogen/phosphorus and potassium/formulated fertilizer application/sensing measurement/spectroscopy
维普
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