1. Critical Ratio of Calcium and Boron in Maize Shoot for Optimum Growth.
- Author
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Kanwal, Shamsa, Rahmatullah, Aziz, Tariq, Maqsood, MuhammadAamer, and Abbas, Najam
- Subjects
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CORN , *PLANT shoots , *CALCIUM , *BORON , *PLANT growth , *SOILS - Abstract
Boron (B) deficiency is widely reported in alkaline calcareous soils of the world, including Pakistan. High calcium (Ca) content in such soils can affect the availability and utilization of B by plants. Effect of applied B at different levels of Ca addition on maize was studied in hydroponics. Four maize cultivars ('EV-5089', 'SWL-2000', 'EV-6089', and 'Sultan') were grown at three levels of Ca (0.25 mM, 1 mM, and 2 mM) and two levels of B (0 and 25 μ M). Application of both the nutrients increased shoot dry matter production. However, application of Ca antagonized the B concentration in shoot of four maize cultivars. A curvilinear relationship existed between Ca/B ratio in shoot and relative shoot dry matter of maize cultivars. Implication of using of Ca/B ratio for managing commonly occurring B deficiency in calcareous soils is suggested. [ABSTRACT FROM AUTHOR]
- Published
- 2008
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