Mathematical Analyses for the influence of Soil Condi-tions and Nntrient Interactions on Cotton YieldsEnglish Full Text
ZHANG JIANHUI;TANG SHIJIA; LUO YOUFANG; HU CHANGQING; and YANGXIAO(Department of Soil Science, Institute of Mountain Hazards and Environment, Chinese Academy of Sciencesand Ministcy of Water Conseruancy, Chengdu 610O41 (China))(Cotton Institute, Si
Abstract: he influence of soil chemical properties and soil nutrition on cotton yields was studied by means ofestablishing mathematical models. The nultivariate quadratic regression equations developed by a stepwiseregression method not only presented the single effect of soil factors but also displayed the interaction （syn-ergistic or antagonistic） of soil nutrients. The effect of individual factor and the way of nutrient interactionwere further analysed by the path analysis method. The results showed that among major factors affectingcotton yields, there existed the interactions between macronutrients（available P × available K）, and betweenmacronutrients and microelements （N×Zn, P×Mo, P×Cu, P × Zn, K×Mo） besides the single effect of soilpH, total P, available Cu and available Zn.
Keywords：
combined effect; cotton yield; multivariate quadratic regression; path analysis; soil nutrient;
- Series：
(D) Agriculture
- Subject：
Fundamental Science of Agriculture; Agronomy
- Classification Code：
S158
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