There are a large number of Provincial coastal growth and yield research experiments, and these have been assessed and ranked in terms of their ability to provide quality data. The resulting Coastal GY Field Experiments program consists of only those experiments and installations that can provide high quality data and achieve their treatment response objectives. Priority remeasurements this year include:
EP703 Extensive Studies of Fertilizing and Thinning - 73 plots from 6 installation will be remeasured (described above). EP703 was initiated in 1971 to investigate the growth response of Douglas-fir and western hemlock at three levels of fertilization and three levels of thinning in a replicated, factorial design. The experiment originally encompassed 940 permanent plots located at 85 installations throughout coastal BC. Of the original 85 installations, 62 have been highly ranked for importance to the program and most of these high priority installations have had their 8th measurement. In addition to tree diameter, height and condition codes, data has been collected on pre-treatment forest conditions, tree ages, crown width, pathological indicators, site information, soil texture, nutrients and moisture regimes, foliar nitrogen, on-site weather stations, understorey vegetation, mortality and ingrowth. The data from this experiment is the single, largest source of data for coastal stands in BC and has provided the most important validation and calibration data for second-growth coastal hemlock and Douglas-fir. The data has been used by research organizations and consultants in BC, the Pacific northwest, and internationally. It has been used to model the spread and effects of root rot over time, effects of fertilizing and thinning, stand development, crown response and other projects that require long-term tree measurement data.
EP 62, 63, 64, 66, 283 Successive Thinnings in a Natural Stand of Douglas-fir (The Schenstrom Plots). This was the first experiment ever established in B.C. in 1929 at Cowichan Lake by Sig Schenstrom in a naturally regenerated 18 year-old stand of Fd. There are 5 treatment plots including a control, heavy crown and and low thinnings, and very heavy crown and low thinnings. The plots have been remeasured after 10m height growth (about every 10 years) and were last remeasured in 1999. The original objectives were: 1. To develop a yield table based on a series of successive remeasurements. 2. To compare the yield of several plots thinned by different methods.
EP429 Spacing Trials of Douglas-fir, Western Redcedar and Grand Fir in Pure and Mixed Stands. Established in 1963 (the plantation is 46 years old in 2009) as an espacement trial of three spacings 1.8, 2.7 and 3.7m, and six species combinations: pure Fd, Cw and Bg, and mixes Fd-Cw, Fd-Bg, and Cw-Bg for a total of 18 plots. Each plots is 0.04 ha, and the number of trees varies by spacing. The objective is to compare the effects of a) spacing and b) species-mix on the survival and growth and yield of plantation of Douglas-fir, western red cedar, and grand fir.
E.P. 1065 02 Pruning Western Hemlock
Located at Jordan River, South Island Forest District and Naka Creek, Port McNeill Forest District, this pruning experiment was established in 1992 within a plantation originally established as a progeny trial -experiment EP 813 (411, 418). The Jordan River study was planted with western hemlock in spring 1981, and Naka Creek in spring 1982. All plots were spaced to 4 metre before pruning in 1992. There are 15 (36 tree) plots at both Jordan River and Naka Creek and pruning treatments were none (control), 4.5, 3.5, 2.5, or 1.5 metres of crown removal. Naka Creek has an additional 12 (48 tree) plots. The objective is to determine and compare the impact of different severities of pruning on the growth, yield and value of coastal western hemlock. The installation has been remeasured every 5 years and was last remeasured in 2005. The Jordan River site i
de Montigny,, E., Louise. 2010. Natural Regeneration, Mortality and Residual Growth Response 25 Years after Partial Cutting on the Coast. Forest Investment Account (FIA) - Forest Science Program. Forest Investment Account Report
Topic: FLNRORD Research Program
Keywords: Forest, Investment, Account, (FIA), British, Columbia
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