| Autor: |
Denmead, O. T., Nulsen, R., Thurtell, G. W. |
| Zdroj: |
Soil Science Society of America Journal; September 1978, Vol. 42 Issue: 5 p840-842, 3p |
| Abstrakt: |
A micrometeorological technique was used to calculate the net transfer of NH3between a corn crop and the atmosphere. On the 10 days of measurement, there was continual interchange of NH3between crop and atmosphere with a strong indication of a diurnal cycle. Ammonia absorption by the plant‐soil system (downward transfer of NH3) predominated when the soil surface was dry, but sustained losses of NH3(upward transfer) occurred when it was moist. Net absorption rates of 6.6 g N ha−1hour−1were calculated in the former period, and net losses of as much as 27.6 g N ha−1hour−1in the latter. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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