Interactive Effects of Pot Geometry, Water Management, Salinity, and Growing Medium on Growth and Yield Components of Snapbean in the Greenhouse1
- W. F. Campbell,
- R. J. Wagenet and
- A. Jones2
Results of greenhouse experiments vary with pot size and shape, i.e., surface area/depth ratio (S/D), even when genetic, environmental, and nutritional factors are held constant. This paper demonstrates the importance of the S/D ratio on snapbeans (Phaseolus vulgaris L.) as influenced by salinity, water management, growing medium, and soil surface mulch. In the first experiment, plant dry weight, pod and seed number, and seed weight of ‘Blue Lake’ snapbean (bush-type) were significantly reduced as the S/D ratio and electrical conductivity (EC) of the irrigation water increased. Plant dry weight was also affected by changes in watering interval (WI). With the exception of the EC × WI interaction, all of the interactions significantly affected plant dry weights. The S/D × EC interaction significantly affected seed number and seed weight per plant. In the second experiment, plant dry weight and pod and seed number per ‘Earliwax’ snapbean plant were significantly affected by S/D, water quantity (WQ), substrate type (ST), and WI. Substrate type and WI significantly affected seed weight per plant. Interactions involving S/D ratios, WQ, and WI significantly affected yield components. Soil surface mulches alone did not significantly influence individual yield components, but had significant effects in combination with S/D and WQ. Both of these experiments demonstrated the importance of S/D ratio on plant yield and provide further proof that the results of greenhouse experiments are not likely to correspond to those in the field.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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