Research on Optimized Fertilization for Fitting Type Flue-cured Tobacco Based on Partial Least squares Regression
This study constructed a quantitative fertilization model for high-quality filling fine-cared tobacco leaves and the reduce of environmental pollution and the leaf quality decline caused by overfertilization. A mathematk model of flue-cured tobacco production and principal chemical components was established by the Partial Least-squares Regression (PLSR) fertilization function model through massive field experiment The results showed that there was significant regression relationship between NPK fertilizers and flue-cured tobacco production and chemical components. First order term modulus showed the primary and secondary relationship between NPK fertilizers affecting flue-cured tobacco; reciprocation term and quadratic term modulus indicated the occurrence of the threshold value of NPK fertilizer proration. The application of NPK fertilizers showed the synergistic effects below the threshold value, whereas NPK fertilizer application produced the antagonistic effects beyond die threshold. For obtaining the max economic returns, the optimum fertilization was N:P:K=1:1.6:2.1. For improving flue-cured tobacco aroma, Inflammability and safely fmnlrfng, the optimum fertilization was N:P:K=1:13:2.9.
flue-cured tobacco fertilizer partial least-squres regression model (PISX model)
Yin Pengda Zhu Wenxu Zhang Huihui Sun Guangyu Jiao Yusheng Zhao Guangwei Liu Deyu
College of Life Science, Northeast Forestry University Harbin. P. R. China China Tobacco Northeast Agricultural Experimental Station
国际会议
深圳
英文
149-153
2011-03-28（万方平台首次上网日期，不代表论文的发表时间）