Forest soil rehabilitation with tillage and wood waste enhances seedling establishment but not height after 8 years

Author:

Bulmer C.123,Venner K.123,Prescott C.123

Affiliation:

1. Research Branch, British Columbia Ministry of Forests and Range, 3401 Reservoir Road, Vernon, BC V1B 2C7, Canada.

2. Scopeworks Engineering Ltd., 2335 23rd Avenue SW, Calgary, AB T2T 0W3, Canada.

3. Faculty of Forestry, The University of British Columbia, Vancouver, BC V6T 1Z4, Canada.

Abstract

We evaluated soil conditions of rehabilitated log landings in the Interior Douglas-fir biogeoclimatic zone of British Columbia during the first 3 years after treatment and the growth of lodgepole pine ( Pinus contorta Dougl. ex Loud. var. latifolia Engelm.) on these log landings over 8 years. Rehabilitation treatments included combinations of tillage and the addition of either stockpiled topsoil or one of three organic amendments: hog fuel, sort-yard waste, and a wood waste – biosolids compost. The woody amendments were either applied as a surface mulch or incorporated into the soil after tillage. Tillage and addition of wood waste reduced soil bulk density and increased carbon content. Daytime soil temperatures in summer were lower under a hog fuel mulch than for the other treatments. The plots receiving hog fuel also had higher soil moisture content. One year after treatment, soil mechanical resistance for untreated soils, and those that were simply tilled, exceeded 2500 kPa for much of the growing season. Plots receiving wood waste had lower mechanical resistance. Use of wood waste in rehabilitation improved soil conditions and contributed to improved survival rates for planted lodgepole pine seedlings. Height growth after 8 years was not significantly affected by the treatments.

Publisher

Canadian Science Publishing

Subject

Ecology,Forestry,Global and Planetary Change

Reference59 articles.

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