Abstract
Abstract The influence of K nutritional level on ‘Coastal bermudagrass’ (Cynodon dactylon L. Pers.) rhizome characteristics under field conditions was recently reported. As K nutritional stress increased, the weight of rhizomes found growing beneath the sward were found to decrease drastically. Additionally spring regrowth was shown to be proportional to the amount of rhizomes present in the fall. Obviously, K nutritional stress resulted in the deterioration of the rhizomes already present and possibly on the initiation of new rhizomes and their subsequent growth or on both of these factors. A greenhouse study was conducted to investigate the effect of K nutritional status on the initiation of new rhizomes. Darco (Grossarenic Paleudult; loamy, siliceous, thermic) soil from a K deficient area was collected for the study. Potassium rates of 0, 33.6, 67.3, 101, 135 and 269 kg/ha was applied to each of four pots. Eight rhizome pieces 2.5 cm long (containing a node in the middle) were placed 2.5 cm below the s...
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