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ARS Home » Midwest Area » Morris, Minnesota » Soil Management Research » Research » Publications at this Location » Publication #151678
Title: EFFECT OF VANADIUM AND NUTRIENT IONIC RATIOS ON GROWTH AND DEVELOPMENT OF CUPHEA

Author
item Olness, Alan
item Gesch, Russell
item Forcella, Frank
item Archer, David
item Rinke, Jana

Submitted to: ASA-CSSA-SSSA Annual Meeting Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 11/6/2003
Publication Date: 11/6/2003
Citation: OLNESS, A.E., GESCH, R.W., FORCELLA, F., ARCHER, D.W., RINKE, J.L. EFFECT OF VANADIUM AND NUTRIENT IONIC RATIOS ON GROWTH AND DEVELOPMENT OF CUPHEA. CD-ROM. MADISON, WI: ASA-CSSA-SSSA. 2003.

Interpretive Summary:

Technical Abstract: Little is known regarding the optimal mineral nutritional requirements of cuphea (Cuphea viscossisima x C. lanceolata 'PSR 23'). Oilseed crops such as cuphea often need additional phosphorus (P) to achieve optimal economic yield. Vanadium (V), a commonly occurring soil constituent, interferes with plant P uptake. Hydroponic culture was used to evaluate the relative effect of V on growth and development of cuphea. Relative root length, root surface area, root weight, and aerial dry weights decreased exponentially as the V concentration increased from 0 to 153 uM. In contrast to field observations of other crops, increasing the Mg:(Mg + Ca) ratio further decreased plant growth by as much 50% at V concentrations greater than 31 uM. Root length decreased by about 50% of the control when grown in 153 uM V and relative root area and dry weight decreased by > 75%. Increases in V concentration sharply reduced lateral branching in roots. Reduction in root growth was accompanied by a chlorotic appearance. Results suggest that readily available V in field situations will result in poor root growth and crop performance of cuphea. Also, interaction of V and MgSO4 will lead to further reductions in yields in the field.