Nitrogen Fertilization Decision-Making Model During Sugar Growth Period of Sugar Beet Roots Based on Multispectral Technology
To obtain fast and accurate information of the growth of sugar beet and to achieve high quality and high yield by precise fertilization of sugar beet in the cold region of Northeast China,the multi-spectral images and field measurements of sugar beet'KWS7748'were obtained at the experimental site of Hulan Campus of Heilongjiang University in Harbin,Heilongjiang Province in 2022.The optimum vegetation index reflecting the physiology and biochemistry of sugar beet during this period was selected,and a decision-making model for sugar beet N application was constructed.The results showed that the sugar beet yield increased and gradually decreased,while the sugar content significantly reduced with the increase of N-fertilizer application.Based on the optimum N application rate of the plot,it generated a fertilizer map of N fertilizer variables used for sugar beet in the experimental area,which was consistent with the actual situation.UAV remote sensing technology is of theoretical importance in diagnosing nitrogen nutrition in sugar beet and guiding the precise application of nitrogen fertilizer to achieve high quality and yield.
NETL
NSTL
万方数据
