| タイトル | LEAF AREA DEVELOPMENT IN SOME CROP AND WEED SPECIES |
| 本文（外部サイト） | http://catalog.lib.kyushu-u.ac.jp/handle/2324/8141/KJ00004506745.pdf |
| 参考URL | http://hdl.handle.net/2324/8141 |
| 著者（英） | Alm, D. M.; Pike, D. R.; Hesketh, J. D.; Stoller, E. W. |
| 発行日 | 2009-04-22 |
| 発行機関など | Biotron Institute, Kyushu University |
| 刊行物名 | BIOTRONICS |
| 巻 | 17 |
| 開始ページ | 29 |
| 終了ページ | 39 |
| 刊行年月日 | 1988-12 |
| 言語 | eng |
| 内容記述 | Leaf expansion is an important factor determining the competitive ability of a crop or weed. Crop models for leaf expansion have been under study and development for some time; we report here an exploratory effort to develop a similar information base for weed models. Such models summarise what is known about plant behavior; study of crop: weed competition models may lead to better methods for weed control and better predictions of crop yield. Crop and weed plants were grown in growth cabinets to determine the effect of temperature on leaf appearance rate; such information was used to develop speciesspecific degree day models for germination, seedling emergence to the first leaf, and the appearance of successive mainstem leaves. Total leaf area was measured on seedlings with a range of mainstem leaf numbers, in both controlled environment and field conditions. Area per plant vs. accumulated degree days could then be determined from the predicted mainstem leaf number, using the degree day models and derived, allometric relationships between leaf numbers and accumulated area. A method for estimating threshold temperatures for leaf expansion was also developed. Limitations to such a simple model for predicting seedling leaf area are discussed, with an indication of improvements needed. |
| キーワード | phenology; degree-days; base temperature; crop systems modeling; Zea mays (L.); Glycine max (L.) Merr.; Gossypium hirsutum (L.); Helianthus annuus (L.); Pisum sativum (L.); Chenopodium album (L.); Amaranthus hybridis; Abutilon theophrasti Medic.; Datura stramonium (L.); Digitaria sanguinalis (L.); Solanum ptycanthum Dun; Xanthium strumarium (L.) |
| 資料種別 | Departmental Bulletin Paper |
| 著者版フラグ | publisher |
| ISSN | 0289-0011 |
| NCID | AA00110208 |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/587898 |
