UAV Based Nitrogen Management of Maize in China
Yang Zhang 1, Zichong Wang1, Klaus Spohrer1, Xiongkui He2, Joachim Müller1
1University of Hohenheim, Inst. of Agricultural Engineering, Tropics and Subtropics Group, Germany
Nitrogen is the main fertiliser of maize in China. However, misuse of nitrogen fertiliser is widespread. To ensure optimal fertilisation and high crop yields as well as to reduce environmental pollution, precise fertiliser application of nitrogen should be implemented. UAV based spectral remote sensing of plant nitrogen status is fast and non-destructive and thus a good method to monitor possible stress in maize with respect to nitrogen fertilisation. After getting the spectral information of the plant canopy, it is important to decide whether the plants are stressed or not. However, most researchers focus on the accurate nitrogen detection of the plants by analysing different vegetation indices (VIs). Since the recommended amount of nitrogen fertiliser for plants is not unique but within a certain range, there are large individual differences in crop growth. There is still not enough research about optimal fertilisation in practice.
Keywords: Maize, nitrogen fertilisation, spectral remote sensing, UAV
Contact Address: Yang Zhang , University of Hohenheim, Inst. of Agricultural Engineering, Tropics and Subtropics Group, Stuttgart, Germany, e-mail: yang.zhanguni-hohenheim.de