Abstract
A pot experiment was conducted to study the interaction between soil salinity and two major nutrients, nitrogen and phosphorus, and the effect of this interaction on the growth and ionic composition of corn plants.
Four levels of soil salinity, 3.4, 6.7, 9.2, and 12.5 dsm-1 were prepared and four rates of nitrogen, equivalent to 0, 120, 180, and 240 kg N ha-1, and four rates of phosphorus, equivalent to 0, 60, 120, and 180 kg P2O5 ha-1, were added separately and combined. A factorial completely randomized design with three replicates was used. At the flowering stage, the plants were harvested and separated into stems, leaves and roots. Nitrogen, phosphorus, potassium, calcium, magnesium, sodium and chloride were determined in the plant parts.
The results showed that increasing soil salinity caused a decrease in dry matter, and an increase in the concentration of nitrogen, sodium, magnesium and chloride in most plant parts.
Application of nitrogen and phosphorus fertilizers under saline conditions improved the growth of corn and reduced the concentration of chloride and magnesium.
The results also indicated that adding nitrogen and phosphorus fertilizers together, produced better positive interaction with salinity than when added separately. Applications of nitrogen and phosphorus in quantities equivalent to 240 kg N ha-1 and 180 kg P2O5 ha-1 were found to be the optimum levels for corn under the salinity levels used in this experiment.
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© 1990 Kluwer Academic Publishers
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Alzubaidi, A., Aljanabi, A.S., Al-Rawi, A. (1990). Interaction between nitrogen and phosphorus fertilizers and soil salinity and its effect on growth and ionic composition of corn (Zea mays L.). In: El Bassam, N., Dambroth, M., Loughman, B.C. (eds) Genetic Aspects of Plant Mineral Nutrition. Developments in Plant and Soil Sciences, vol 42. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-2053-8_30
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DOI: https://doi.org/10.1007/978-94-009-2053-8_30
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-7421-6
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