| Autor: |
Ben du Toit, R. Anthony Job, Denis Oscroft, Athol Arbuthnot |
| Rok vydání: |
2001 |
| Předmět: |
|
| Zdroj: |
The Southern African Forestry Journal. 192:9-18 |
| ISSN: |
1029-5925 |
| DOI: |
10.1080/20702620.2001.10434129 |
| Popis: |
Synopsis Remedial fertilizer applications were applied to nutrient-poor stands of Eucalyptus grandis growing on infertile (ex-agricultural) land of the Zululand coastal plain. Two nitrogen-rich fertilizer mixtures were applied in one year-old stands at rates ranging from zero to 160 kg N ha-1. Foliar nitrogen levels increased highly significantly at the higher levels of fertilization. Ahighly significant response to height, diameter and basal area growth was observed within 6 months of treatment initiation which was sustained until clear felling (8.3 years). A comparison ofthe unfertilized control with the optimum treatment i.e. a single fertilizer dose equivalent to 80 kg N ha-1) yielded the following results: Utilizable wood volume increased from 136.7 to 264.3 m 3 ha-1, The wood density showed a weakly significant increase from 448 to 472 kg m-3. The pulpability factor (defined as the pulp yield / kappa number) decreased significantly from 2.63 to 2.32. The net effect of fertilization on pulping proper... |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
