| タイトル | Efficiency of N use by wheat as a function of influx and efflux of NO3 |
| 本文（外部サイト） | http://hdl.handle.net/2060/19910022464 |
| 著者（英） | Huffaker, R. C.; Ward, M. R.; Aslam, M. |
| 著者所属（英） | California Univ. |
| 発行日 | 1990-03-01 |
| 言語 | eng |
| 内容記述 | Since N assimilation is one of the most costly functions of a plant, its efflux before assimilation results in a serious energy cost and loss in efficiency which could decrease yields. Efficient crop production is critical to the Closed Ecology Life Support System (CELSS). The objective is to determine the extent of efflux of the N species NO3(-), NH4(+), NO2(-), and urea after uptake, and possible means of regulation. Researchers found that NO3 efflux became serious as its substrate level increased. Efflux/Influx (E/I) of NO3(-) was greater in darkness (35 percent) than in light (14 percent), and the ratio greatly increased with substrate NO3 (-), (up to 45 percent at 10 mM). It seems advantageous to use the lowest possible nutrient concentration of NO3(-). The feasibility of using ClO3(-) was assessed and its toxicity determined. |
| NASA分類 | MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT |
| レポートNO | 91N31778 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/130964 |
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