頁籤選單縮合
| 題 名 | 若干水田殺草劑之藥效比較=Testing of Some Herbicides in Paddy Field |
|---|---|
| 編 次 | 一 |
| 作 者 | 湯文通; 鄔宏潘; | 書刊名 | 中華農學會報 |
| 卷 期 | 49 民54.03 |
| 頁 次 | 頁15-24 |
| 關鍵詞 | 水田殺草劑; |
| 語 文 | 中文(Chinese) |
| 英文摘要 | The present report is based upon an experiment carried out at Taipei, Taiwan in early 1964. Four kinds of herbicides were used: Ordram, Eptam, R4518, and N4069, all provided by Stauffer Chemical Co.. Chief features of the results are as follows. 1. In general, the herbicides tested had no or very little unfavorable effects to the yield of rice. To the growth and development of paddy, however, all except Ordram were more or less harmful. For instance, R4518 resulted in yellowish leaf-spots of the plant at first two weeks after application; N4069, yellowish leaf-stripes; and Eptam chlorosis and dwarfism. In the latter two cases, the harmful effects lasted until the, final growth stage of the plant. 2. Ordram was found to be most effective to different kinds of paddy-field weeds in general; R4518, sligntly so; whereas N4069 and Eptam, not al all. This was also true for controlling the barnyard grass (Echinochlora crus-galli) in terms of its dry weight. 3. Insofar as the number of the barnyard grass is concerned, the application fo Ordram of R4518 alone was less effective than combined application of these two chemicals. 4. Only about 10% of the barnyard grass growing in the paddy field was found to have been introduced from seedbed during the process of transplanting. And after its killing by herbicides or eradicating by hand, the original niche generally would not be reoccupied by other weeds. Therefore the control of this grass, in the paddy field rather then seedbed, should be emphasized. 5. The weeding by hand had slightly but not significantly favorable effects to the yield or rice than the seed-control by herbicides. There was also no significant positive proof of the effectiveness of intertillage to the yield. |
本系統中英文摘要資訊取自各篇刊載內容。