期刊
SCANDINAVIAN JOURNAL OF FOREST RESEARCH
卷 21, 期 6, 页码 496-504出版社
TAYLOR & FRANCIS AS
DOI: 10.1080/02827580601073263
关键词
cleaning; Norway spruce; productivity; sapling stands; tending
类别
The effect of the timing of precommercial thinning on the productivity of work was examined in young Norway spruce [ Picea abies ( L.) Karst.] stands in southern Finland. The common problem of large variation between sample plots in time studies was avoided by introducing a new approach based on a combination of stand measurements, tree-ring analysis and existing work productivity functions. The results indicated that a 2 year delay in the precommercial thinning of a stand was enough to cause an increase of 10 - 42% in the consumption of working time at a mean height of 1.5 - 3.1 m. At a later thinning, at a mean height 4.1 - 7.2 m, the increase was 8 - 24%. The development of the stand up to the first commercial thinning was not significantly influenced by a 2 year delay in the late precommercial thinning.
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