Research progress of sensing measurement technology for nitrogen,phosphorus and potassium content in soil
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.
soil nitrogenphosphorus and potassiumformulated fertilizer applicationsensing measurementspectroscopy
万方数据
维普
