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Response characteristics and efficiency of variable rate fertilization based on spectral reflectance

International Journal of Agricultural and Biological Engineering 2018年第6期11卷 152-158页

作者： Man Chen Zhenjie Yang Xiaochan Wang Yinyan Shi Yu Zhang College of Engineering Nanjing Agricultural UniversityNanjing 210031China Nanjing Research Institute for Agricultural Mechanization Ministry of AgricultureNanjing 210014China Jiangsu Province Engineering Laboratory for Modern Facilities Agricultural Technology and Equipment Nanjing 210031China

The key technical problem of variable rate fertilization system based on spectrum information was precise variable fertilization in certain area according to the acquired spectrum *** fertilizing is a critical problem in most of current fertilizer *** model was built and analyzed in this study to improve the *** tests were conducted on different wheat breeds and the results were *** tests showed that variable rate fertilization had obvious hysteresis phenomenon with the maximum lag distance of 3.82 m,the minimum lag distance of 1.73 m and average of 3.06 *** phenomenon of the variable rate fertilization system was obviously decreased when implanting a correction time of 2.04 s with the maximum lag distance of 0.61 *** effects varied by different wheat *** rate fertilization had an advantage of improving spatial differences of Yangmai-23,and the spatial variability of which decreased by 14.23%.In the small test area,the amount of fertilizer in Zhenmai-168 decreased by 2.84 kg,while the amount of which in Yangmai-23 increased by 3.83 *** of Zhenmai-168 in small area was lower than that in traditional pattern,but the condition of Yangmai-23 was on the *** information for increasing performance of fertilization in variable rate fertilization system was provided in this paper.

关键词： variable rate fertilization fertilization lag calibration fertilization efficiency winter wheat

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