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Published online 1 January 1979
Published in Agron J 71:139-141 (1979)
© 1979 American Society of Agronomy
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Growth and Mineral Composition of Mungbean as Influenced by P and Fe Fertilization1

A Bassiri, A Kashirad and M Kheradnam2

Phosphorus is among the principal nutrient elements needed for growth by many crops m arid and semi-arid agricultural regions. The advantageous effects of P, especially for legumes, have been studied in detail. However, relatively large amounts of soil P interfere with the availability of Fe to plants. The effects of P and Fe on growth and mineral composition of mungbeans, Phaseolus areus (Roxb.) Hepper, are reported herein. Mungbeans were grown for 8 weeks in a silty clay soil, classified as Xerollic Xerochrept, treated with levels of P (0,50,100, and 200 ppm) and Fe (0,5,10, and 20 ppm). Maximum top and root dry weight and plant height occurred with 50 ppm P. Iron treatments reduced top and root dry weight and plant height. It was concluded that mungbeans required 50 ppm P and no Fe for optimum growth in this soil under the conditions of this experiment. Increased levels of P in the soil caused significantly higher P uptake, greater P and N concentration, and lower Zn concentration in the tops. The concentration of Fe, N, K, and Ca in the tops was significantly increased, while the concentration of Mg and the uptake of P, N, K, Ca, Mg, and Zn decreased with increasing Fe levels in the soil.

Key Words: Phaseolus aureus (Roxb.) • Hepper • Root and top growth • Herbage concentrations of N • P • Fe • K • Ca • Mg • Zn • P:Fe ratio

1 Contribution from the Deps. of Agronomy and Soil Science, College of Agriculture, Pahlavi Univ., Shiraz, Iran.

2 Associate professor of agronomy, professor of soil science, and assistant professor of agronomy, respectively.

Received for publication December 27, 1977.




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Copyright © 1979 by the American Society of Agronomy.