Publication Date
1985
Location
Kyoto Japan
Description
Two experiments were conducted. Seasonal variation of dry matter production and growth of bahiagrass (Paspalum notatum) including vetch (Vicia sativa L.) and Italian ryegrass (Lolium multiflorum L.) were investigated in Exp. 1 (Field Exp.). The effects of clipping frequency and nitrogen application levels on the regrowth of bahiagrass in association with grazing intensity was observed in Exp. 2 (Pot Exp.). In Exp. 1, the pasture was rotationally grazed by 9 or 6 beef cattle and botanical composition, intake, daily gain and number of tillers were determined. The pasture was dominated by vetch and Italian ryegrass in April and May and bahiagrass was vigorously dominant from late June to Autumn. Density of bahiagrass was hardly influenced by grazing. In Exp. 2, nitrogen application levels were 0, 30 and 90 kg/lOa and clipping intervals were 3, 6, 12 and 24 days. Leaf weight on the 12th day after clipping for the treatment groups of 3 and 6 day intervals were maximum with 45 mg and 161 mg per plant respectively, while the maximum values of leaf weights on the 24th day for 12 and 24 day intervals were 400 mg and 1273 mg respectively. In relation to nitrogen application level, the treatment groups with maximum values for leaf weight in descending order were 30, 90 and O kg/lOa. Presence of vetch and Italian ryegrass in the bahiagrass pasture was not enough to improve the grazing capacity of grassland because of its low yield and short growth period. Frequent clipping caused tiller death and reduction in leaf and stolon weight, while nitrogen application was effective to relieve these adverse effects.
Citation
Hirakawa, M; Okubo, T; and Kayama, R, "Seasonal Dry Matter Production in Grazed Pasture of Paspalum notatum and Cumulative Effect of Defoliation" (1985). IGC Proceedings (1985-2023). 61.
(URL: https://uknowledge.uky.edu/igc/1985/ses6/61)
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
Seasonal Dry Matter Production in Grazed Pasture of Paspalum notatum and Cumulative Effect of Defoliation
Kyoto Japan
Two experiments were conducted. Seasonal variation of dry matter production and growth of bahiagrass (Paspalum notatum) including vetch (Vicia sativa L.) and Italian ryegrass (Lolium multiflorum L.) were investigated in Exp. 1 (Field Exp.). The effects of clipping frequency and nitrogen application levels on the regrowth of bahiagrass in association with grazing intensity was observed in Exp. 2 (Pot Exp.). In Exp. 1, the pasture was rotationally grazed by 9 or 6 beef cattle and botanical composition, intake, daily gain and number of tillers were determined. The pasture was dominated by vetch and Italian ryegrass in April and May and bahiagrass was vigorously dominant from late June to Autumn. Density of bahiagrass was hardly influenced by grazing. In Exp. 2, nitrogen application levels were 0, 30 and 90 kg/lOa and clipping intervals were 3, 6, 12 and 24 days. Leaf weight on the 12th day after clipping for the treatment groups of 3 and 6 day intervals were maximum with 45 mg and 161 mg per plant respectively, while the maximum values of leaf weights on the 24th day for 12 and 24 day intervals were 400 mg and 1273 mg respectively. In relation to nitrogen application level, the treatment groups with maximum values for leaf weight in descending order were 30, 90 and O kg/lOa. Presence of vetch and Italian ryegrass in the bahiagrass pasture was not enough to improve the grazing capacity of grassland because of its low yield and short growth period. Frequent clipping caused tiller death and reduction in leaf and stolon weight, while nitrogen application was effective to relieve these adverse effects.
