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題 名 | 尼羅草莖苗播種量對草地建立之影響=Effects of Planting Rate on Establishment of Nilegrass Pasture |
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作 者 | 張世融; 洪國源; 許福星; | 書刊名 | 畜產研究 |
卷 期 | 39:3 民95.09 |
頁 次 | 頁203-213 |
分類號 | 434.4 |
關鍵詞 | 尼羅草; 播種量; 草地建立; Nilegrass; Acroceras macrum; Planting rate; Pasture establishment; |
語 文 | 中文(Chinese) |
中文摘要 | 尼羅草(Acroceras macrum)係以莖苗繁殖建立的多年生禾本科牧草,本試驗的目的在瞭解尼羅草莖苗播種量與草地建立之關係,期能提供適當之莖苗播種量供尼羅草種植之參考。將尼羅草台畜草一號以1,000、1,500、2,000、2,500、3,000及3,500 kg/ha等五種莖苗播種量撒播,種植後及每次青割後四週,調查雜草種類,於每隔八週收割時,取樣調查尼羅草與雜草的生長競爭情形,並計算單位面積尼羅草乾物產量。試驗結果顯示單位面積內尼羅草的草莖數與播種量成正相關的趨勢,但隨著播種量提高,雜草數目減至一定程度即不再減少。草地建立初期,尼羅草所佔樣品乾物量的百分比隨播種量提高而增加,尼羅草乾物產量亦呈現相似的結果。另一方面,隨著青割次數的增加,尼羅草所佔樣品乾物量的百分比愈高,乾物產量也愈穩定。高播種量(2,500 kg/ha以上)的處理,在第二次青割之後,尼羅草所佔樣品乾物量的百分比即已超過90%,顯示尼羅草草地已達建立的階段,因此提高尼羅草畜草一號之莖苗用量至2,500 kg/ha以上,可顯著縮短建立牧草地所需的時間。 |
英文摘要 | Nilegrass (Acroceras macrum) is a perennial forage grass propagated by stem. The objectives of the experiment were to determine the relationship between stem planting rate and the establishment of nilegress pasture and to provide the optimum planting rate for nilegrass. Nilegrass cv. Taishi No. 1 was planted at 5 planting rates, i.e., 1000, 1500, 2000, 2500, 3000 and 3500 kg/ha in autumn, 1999 and spring, 2000, respectively. Weed species in the field of nilegrass pasture were determined 4 weeks after planting and at each cutting. Percentage and dry matter yield of nilegrass were determined every 8 weeks. It showed that shoot number of nilegrass was positively related to planting rate at early stage of pasture establishment. Both percentage and plant number of weed decreased to a certain extent when the planting rates were increased. Both percentage and dry matter yield of nilegrass increased when planting rates were increased. The percentage of nilegrass significantly increased and dry matter yield of nilegrass became more stable with further cutting. Nilegrass with high planting rates (above 2500 kg/ha) were almost established with 90% or more in the pasture after 2 cuttings. It was suggested that planting nilegrass cv. Taishi No. 1 with the rate of 2500 kg/ha or more could significantly shorten the period needed for successful establishment. |
本系統中英文摘要資訊取自各篇刊載內容。