Characterization of light climate under canopies of intensively cultured hybrid poplar plantations
Photosynthetically active radiation (PAR) was measured by quantum sensors in the open and in young hybrid poplar plantations. On clear summer days, the incoming PAR approached 2000 mu E m super(-) super(2) sec super(-) super(1) . From May to Oct., daily PAR in the open averaged 30-33 E m super(-) su...
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| Veröffentlicht in: | Agricultural meteorology 1982-01, Vol.Amsterdam 25 (4), p.245-255 |
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| 1. Verfasser: | |
| Format: | Artikel |
| Sprache: | eng |
| Online-Zugang: | Volltext |
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| Zusammenfassung: | Photosynthetically active radiation (PAR) was measured by quantum sensors in the open and in young hybrid poplar plantations. On clear summer days, the incoming PAR approached 2000 mu E m super(-) super(2) sec super(-) super(1) . From May to Oct., daily PAR in the open averaged 30-33 E m super(-) super(2) . Fully foliated canopies transmitted only a fraction of 1% of the incoming PAR, and leafless canopies transmitted |
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| ISSN: | 0002-1571 |