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Effect of Burial Depth on Emergence of Panicum repens
Md. Amzad Hossain, Yukio Ishimine, Hikaru Akamine, Seiichi Murayama, S. M. Moslem Uddin and Kiyoshi Kuniyoshi
Vol. 47, No. 6 (Nov. - Dec., 1999), pp. 651-656
Stable URL: http://www.jstor.org/stable/4046129
Page Count: 6
You can always find the topics here!Topics: Rhizomes, Soil depth, Weeds, Crop science, Agricultural soils, Sustainable agriculture, Weed science, Agricultural site preparation, Plants, Weed control
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In glasshouse experiments, Panicum repens rhizomes with more than two nodes emerged from soil depths of 1 to 20 cm. Emergence from one-node rhizomes was greatly reduced at depths more than 5 cm. In contrast, culm emergence from ginger-like rhizomes decreased when burial depth (BD) was greater than 20 to 30 cm. P. repens emerged from deeper soil levels with an increasing number of nodes per cutting. Culms emerged from 36% of total underground regenerative organs. About 75 and 95% of the emerged culms were recorded 30 and 60 d after burial, respectively, and 91% emergence was recorded from 20-cm BD. In field studies, only 9% of nodes produced culms following cross-plowing. About 61 and 67% of the emerged culms were recorded 50 and 60 d after land preparation, respectively. Results indicate that mechanical and chemical control methods could be most effective for P. repens when applied approximately 50 d after land preparation. Burying deeper than 30 cm by deep plowing and reducing rhizome length by cross-plowing might effectively reduce emergence of P. repens.
Weed Science © 1999 Weed Science Society of America