Skip to Main Content
Response of ponderosa pine plantations to competing vegetation control in Northern California, USA: A meta- analysisAuthor(s): Jianwei Zhang; Robert Powers; William Oliver; Young David
Source: Forestry. 86: 3-11
Publication Series: Scientific Journal (JRNL)
Download Publication (1.5 MB)
DescriptionA meta-analysis was performed to determine response of stand basal area growth to competing vegetation control (CVC) in ponderosa pine (Pinus ponderosa) plantations grown at 29 sites across northern California. These studies were installed during the last 50 years on site indices from 11 to 35 m at 50 years and often included other treatments besides CVC. Our analyses showed, with considerable certainty, that magnitude of the CVC effect on overall basal area increase was 80% (40-105%). The 40% increase occurred 5 years and the 105% increase occurred 10 years after the treatment was applied. A 67-91% increase was found 15-30 years after CVC. Additional treatments such as fertilization and high stand density accelerated the CVC effect. The trends of the CVC effect not only varied with stand developmental stages, but also differed where CVC treatments were applied to seedlings or to older plantations. Results suggest that productivity response to vegetation control increases during the stand initiation stage and peaks when stands are in the stem exclusion stage. Thus, the magnitude of CVC effect depends on when it is applied relative to the stage of stand development. Any factors that increase stand development will accelerate this process. Therefore, to capture early growth gains, stands must be thinned soon after the onset of inter-tree competition. Timing depends on site productivity and previous silvicultural treatments.
- You may send email to email@example.com to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationZhang, Jianwei; Powers, Robert F,; Oliver, William W.; Young, David H. 2012. Response of ponderosa pine plantations to competing vegetation control in Northern California, USA: A meta- analysis. Forestry. 86: 3-11.
KeywordsVegetation management, ponderosa pine plantation, meta-analysis, long-term studies, forest stand dynamics
- Heavy thinning of ponderosa pine stands: An Arizona case study
- Stripcut-thinning of ponderosa pine stands: An Arizona case study
- Silvicultural applications: Restoring ecological structure and process in ponderosa pine forests
XML: View XML