Abstract:

This study used geostatistical methods and GIS technology to divide tobacco fields into different fertility zones based on soil nutrients content. A recommended fertilization model was established using key parameters obtained from multiple field experiments. The digital tobacco field system and tobacco nutrient management system will push the results of soil testing and formulated fertilization to tobacco farmers to guide fertilization practice. The results showed that the soil alkaline hydrolyzable nitrogen content was at a moderate level, while the available phosphorus and available potassium content were moderate or higher in Fengjie County tobacco growing area. Fertilization zoning showed that the proportion of medium nitrogen, medium or high phosphorus, and medium or high potassium tobacco fields was the largest in the area. The proportion of low nitrogen, low phosphorus, high potassium and medium nitrogen, high phosphorus and medium potassium tobacco fields took the second place. The proportion of low nitrogen, high phosphorus, high potassium, and medium nitrogen, low phosphorus, low potassium tobacco fields was the smallest of them. The digital tobacco field system and tobacco field nutrient management system were developed through research. The systems could conveniently convey soil nutrient information and fertilization formula results to users in real-time for guiding precise fertilization. The research results had opened up the “last kilometer” of soil testing and formulated fertilization, providing technical support for scientific fertilization in tobacco fields.

Key words: GIS technology, geostatistics, flue-cured tobacco, digital, precision fertilization, digital tobacco field system, tobacco field nutrient management system