Nitrogen fertilizer deficiency rapid detection and precise dressing method applied to wheat field management

Abstract

The invention discloses a nitrogen fertilizer deficiency rapid detection and precise dressing method applied to wheat field management, which belongs to the field of remote sensing technology monitoring, and comprises the following steps: combining a leaf nitrogen indicator NDVIgb and a biomass indicator MSAVI in the form of a ratio, calculating a linear decision coefficient and a model between a new combination parameter and a leaf nitrogen nutrition index NNI, calculating the nitrogen fertilizer deficiency rapid detection and precise dressing method, synchronously constructing the quantitative relation between the nitrogen deficiency NDA and the NNI, serving the NNI as an association node, determining the quantitative relation between the NDA and the NDVIgb / MSAVI through adoption of a model link and index conversion method, achieving inversion from the remote sensing index NDVIgb / MSAVI to the nitrogen deficiency, and completing rapid nitrogen deficiency detection and precise dressing of wheat field management. The nitrogen nutrition status of crops can be rapidly and accurately monitored in the crop production process, accurate management of nitrogen fertilizer is achieved, the yield and quality of the crops are improved, and the risk of environmental pollution is reduced.

Description

Technical field [0001] The present invention belongs to the field of remote sensing technical monitoring, and more particularly to a nitrogen fertilizer lack of nitrogen fertilizer lack of nitrogen production in wheat fields. Background technique [0002] Nitrogen (N) is a key factor in promoting photoordination, improving production and quality. In order to obtain high yield, farmers often apply a large amount of nitrogen fertilizer, which not only affects the quality of wheat, but also leads to a large number of nitrate to leak, greenhouse gas (N 2 O) An increase in emissions, pollution underground water, which seriously threatens the health of humans. How to ensure high-yield, high quality, while reducing environmental pollution caused by improper nitrogen fertilizer, it is urgent to solve the technical problems. Therefore, in the crop production process, it is urgent to have a fast and accurate monitoring of a nitrogen nutrient status in the crop production, in order to achie...

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Problems solved by technology

However, currently there are relatively few studies on real-time monitoring of nitrogen nutrition index with the help of hyperspectral remote sensing technology, especially the regional and strong variety selection of wheat production, which makes it difficult to unify the monitoring indicators, models and methods of wheat nitrogen nutrition index. poor sex

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