Abstract
Localized placement of fertilizers, whereby they are introduced into the soil as a discreet band, is used in agriculture due to its beneficial effect on plant growth and productivity. However this effect is not always reproducible. An increase in the efficiency of fertilizer usage following this method of application requires a better understanding of the physiological mechanisms possibly involved. Under natural conditions mineral placement in the soil is also patchy and this patchiness is thought to be an important characteristic of root environment (Jackson and Caldwell, 1996). Thus the study of the effect of heterogeneous distribution of mineral nutrients in soil on plant growth is not only important for improvement of the methods of application of fertilizers but also could contribute to a better understanding of the processes of plant adaptation to the natural soil environment. The studies of root morphology showed increased proliferation of roots in nutrient-rich soil patches (Drew and Saker, 1978; Robinson, 1996). This root growth response is believed to be important for increasing plant productivity, since it enables more efficient acquisition of mineral nutrients (Drew and Saker, 1978; Fransen et al., 1999). However, comparison of the effect of localized and even distribution of fertilizers on productivity of plants grown at different levels of soil moisture showed that beneficial effects of localized nutrition were more pronounced when plants experienced drought (Usov et al., 1988). Increased drought resistance induced by localized fertilizer placement enabled us to speculate that changes in root morphology in response to heterogeneous distribution of nutrients might be important not only for the uptake of ions but also of water.
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Kudoyarova, G.R., Ivanov, I.I., Trapeznikov, V.K., Veselov, S.Y. (2003). Involvement of Hormones in the Increase in Plant Productivity Induced by Localised Fertilizer Placement. In: Macháčková, I., Romanov, G.A. (eds) Phytohormones in Plant Biotechnology and Agriculture. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-2664-1_20
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DOI: https://doi.org/10.1007/978-94-017-2664-1_20
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