Pedosphere 4(3): 255--263, 1994
ISSN 1002-0160/CN 32-1315/P
©1994 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Mathematical analyses for the influence of soil conditions and nntrient interactions on cotton yields |
| ZHANG Jian-Hui1, TANG Shi-Jia1, LUO You-Fang1, HU Chang-Qing2 and YANG Xiao2 |
1 Department of Soil Science, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences and Ministcy of Water Conseruancy, Chengdu 610O41 (China)
2 Cotton Institute, Sichuan Academy of Agricultural Sciences, Jianyang 641400 (China) |
| ABSTRACT |
| The influence of soil chemical properties and soil nutrition on cotton yields was studied by means of establishing mathematical models. The nultivariate quadratic regression equations developed by a stepwise regression method not only presented the single effect of soil factors but also displayed the interaction (synergistic or antagonistic) of soil nutrients. The effect of individual factor and the way of nutrient interaction were further analysed by the path analysis method. The results showed that among major factors affecting cotton yields, there existed the interactions between macronutrients(available P × available K), and between macronutrients and microelements (N × Zn, P × Mo, P × Cu, P × Zn, K × Mo) besides the single effect of soil pH, total P, available Cu and available Zn. |
| Key Words: combined effect, cotton yield, multivariate quadratic regression, path analysis, soil nutrient |
| Citation: Zhang, J. H., Tang, S. J., Luo, Y. F., Hu, C. Q. and Yang, X. 1994. Mathematical analyses for the influence of soil conditions and nntrient interactions on cotton yields. Pedosphere. 4(3): 255-263. |
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