Improving productivity and sustainability of successive rotations ofAcacia auriculiformisplantations in South Vietnam
| Autor: | Vu Dinh Huong, EK Sadanandan Nambiar, Le Thanh Quang, Daniel S Mendham, Pham The Dung |
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| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | Southern Forests: a Journal of Forest Science. 77:51-58 |
| ISSN: | 2070-2639 2070-2620 |
| Popis: | We studied the productivity of Acacia auriculiformis plantations in South Vietnam over three successive rotations covering 15 years. The focus of our study was on the effects of inter-rotation management on stand growth and soil properties. Contrastin g slash and litter management treatments were applied at the start of the sec ond rotation, and reapplied at the start of the third rotation with an additional phosphorus fertiliser treatment. There were improvements in the genetics of planting stock, weed control and stocking with each rotation. Average growth rates (mean annual increment) increased from 10.6 m3 ha−1 y−1 in the first rotation (age 7 years) to 28.3 m3 ha−1 y−1 in the second rotation (age 6 years) and to 33.9 m3 ha−1 y−1 at age 5 years in the third rotation. Removal of slash and litter after harvesting the first rotation removed 20.2 Mg ha−1 biomass, containing 169.6, 13.9, 76.3 and 25.1 kg ha−1 of nitrogen (N), phosphorus (P), potassium and calcium, respectively, from the site. Greater amoun... |
| Databáze: | OpenAIRE |
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