Thinning dense sapling stands of mesquite (Prosopis glandulosa var. glandulosa) to optimize timber production and pasture improvement
| Autor: | Peter Felker, Eladio H. Cornejo-Oviedo, Joseph M. Meyer |
|---|---|
| Rok vydání: | 1991 |
| Předmět: |
geography
geography.geographical_feature_category Thinning biology Prosopis glandulosa ved/biology Lolium rigidum ved/biology.organism_classification_rank.species Randomized block design Forestry Management Monitoring Policy and Law biology.organism_classification Pasture Basal area Crop Dry weight Agronomy Botany Nature and Landscape Conservation Mathematics |
| Zdroj: | Forest Ecology and Management. 46:189-200 |
| ISSN: | 0378-1127 |
| DOI: | 10.1016/0378-1127(91)90231-j |
| Popis: | Our objective was to identify mechanical, chemical or a combination of treatments that would convert dense stands (over 7000 stems ha−1) of small trees into widely spaced, large trees to maximize lumber production and pasture improvement. A randomized complete block design was utilized with four replicates and six treatments. Strips of 8 m width were cleared in two perpendicular directions leaving 2 m × 2 m squares on 10 m rectangular spacings. Pruned or unpruned crop trees were permitted to grow in the 2 m × 2 m squares. To prevent reinvasion of new mesquites until the crop trees became dominant, discing, discing plus seeding with winter rye, and spot spraying with herbicides were applied to the interlying spaces. After 2.5 years, significant treatment differences were found for growth in basal diameter (P = 0.0014), height (P = 0.0261), basal area (P = 0.0063), and dry weight (P = 0.0082). The greatest crop tree growth occurred with annual discing. The greatest reduction in resprouts was obtained with annual spot spraying with herbicides. The basal diameter growth of 1.25 cm year−1 for the disced and pruned treatment is comparable with growth of other high-value hardwoods (i.e. cherry) in northeastern USA. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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