Nutrient uptake by field-grown broccoli and net nutrient mobilization during inflorescence development |
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| Authors: | B J Shelp L Liu |
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| Institution: | (1) Agricultural Engineering Department, The Technion, Haifa, Israel;(2) Photosynthesis Research Unit, ARS, US Department of Agriculture, University of Illinois, 61801 Urbana, IL, USA;(3) the Agronomy Department, University of Illinois, 61801 Urbana, IL, USA;(4) Agricultural Engineering Department, University of Illinois, 61801 Urbana, IL, USA |
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| Abstract: | Our objective was to determine the effect of temperature on root appearance at successive stalk nodes of a maize (Zea mays L.) plant. Plants were grown in three controlled temperature regimes (30/24, 26/20 and 19/14°C 16-/8-h day/night or 28, 24
and 17.3°C mean), as well as in the field. Three plants were dissected twice a week for morphological observation. A second-degree
polynomial, with time as the independent variable and with coefficients linearly related to temperature, was fitted to the
controlled-environment data. This equation tested well against two sets of field data. The appearance of newly rooted stalk
nodes was related to the appearance of new leaf tips and collars. Such information is urgently needed for predicting leaf,
stalk and root growth in maize and other grasses. |
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| Keywords: | adventitious roots degree days phenology Zea mays L |
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