Publication Date
1985
Location
Kyoto Japan
Description
The laboratory experiments with aqueous extracts of 11 tropical grass stubble-residues allowed an examination of the allelopathic effects of the extracts on seed germination and early growth of Italian ryegrass (Lolium multiflorum, cv. Minamiwase, Abbr. as IRG). Germination of IRG was generally found to be reduced with an increase in concentration of the residue extracts. Extracts of African millet (Eleusine coracana), Guinea grass (Panicum maximum, strain GR-171) and setaria (Setaria anceps, cv. Nandi and Kazungula) were very inhibitory to the germination of IRG at a high concentration (4g dried stubble/lOOml) ; whereas in the lower concentrations (1, 2g/100ml) there were no differences in germination among extracts of tropical grasses. The observed response to the 11 grasses at 4g-concentration was in agreement with the results in the field experiment. Significant correlation was obtained between percent germination at 4g-concentration and dry matter yield of IRG. Root length of IRG seedling was considerably reduced but shoot length was slightly increased with increasing concentration of extracts. Extracts of African millet, Guinea grass ( GR-171), Rhodes grass ( Chloris gayana, cv. Katambora) and Kabulabula grass (Panicum coloratum var. Kabulabula, strain GR-29) suppressed markedly root growth of IRG, while there were no pronounced differences in shoot length among the extracts of 11 grasses.
Citation
Takahashi, Y; Uozumi, S; Ono, S; and Yoden, Y, "Italian Ryegrass Response to Allelopathic Effects of Stubble-Residues from Several Tropical Grasses" (1985). IGC Proceedings (1985-2023). 19.
(URL: https://uknowledge.uky.edu/igc/1985/ses3/19)
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
Italian Ryegrass Response to Allelopathic Effects of Stubble-Residues from Several Tropical Grasses
Kyoto Japan
The laboratory experiments with aqueous extracts of 11 tropical grass stubble-residues allowed an examination of the allelopathic effects of the extracts on seed germination and early growth of Italian ryegrass (Lolium multiflorum, cv. Minamiwase, Abbr. as IRG). Germination of IRG was generally found to be reduced with an increase in concentration of the residue extracts. Extracts of African millet (Eleusine coracana), Guinea grass (Panicum maximum, strain GR-171) and setaria (Setaria anceps, cv. Nandi and Kazungula) were very inhibitory to the germination of IRG at a high concentration (4g dried stubble/lOOml) ; whereas in the lower concentrations (1, 2g/100ml) there were no differences in germination among extracts of tropical grasses. The observed response to the 11 grasses at 4g-concentration was in agreement with the results in the field experiment. Significant correlation was obtained between percent germination at 4g-concentration and dry matter yield of IRG. Root length of IRG seedling was considerably reduced but shoot length was slightly increased with increasing concentration of extracts. Extracts of African millet, Guinea grass ( GR-171), Rhodes grass ( Chloris gayana, cv. Katambora) and Kabulabula grass (Panicum coloratum var. Kabulabula, strain GR-29) suppressed markedly root growth of IRG, while there were no pronounced differences in shoot length among the extracts of 11 grasses.
