关键词: 遥感, 氮含量, 模型, 综述

Abstract: Nitrogen is one of the essential nutrients for crop growth. The deficiency or surplus of nitrogen can seriously affect crop yield and economic benefit. Timely, accurate and damage-free monitoring crop nitrogen content is of great significance for crop yield increase, rational fertilization and reduction of environmental pollution. This paper summarized the remote sensing estimation principle of crop nitrogen content, concluded the estimation methods and research progress at home and abroad. On this basis, the paper analyzed the problems existing in crop nitrogen content estimation based on remote sensing spectral data. The key points for future research was put forward, such as the improvement of model universality, the use of multi-source remote sensing data, and the monitoring of crop nitrogen content under influence of multi-factor.

Key words: remote sensing, nitrogen content, model, overview