The effect of weed control method on soil nutrient availability and growth of different hybrid poplar clones
Date
2007-03-01
Authors
Hangs, R.D.
Greer, K.J.
Schroeder, W.R.
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Poster Presentation
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Abstract
During the early establishment phase outplanted hybrid poplar seedlings are the most
vulnerable to lethargic growth or mortality because of interspecific competition with non-crop plant species for available soil moisture and nutrients. Consequently, there is a need to develop practical weed control practices that are not only successful at controlling non-crop plant species, but also cost-effective for producers looking to minimize their input costs. The objectives of this two-year study were to: i) evaluate the effects of different combinations of in-row (plastic mulch, herbicide, and control) and between-row (tillage, herbicide, and control) weed control practices on soil nutrients bioavailability and the early growth of four hybrid poplar clones (Walker, Assiniboine, WP-69, and Hill) and, ii) assess the relationship between growing season soil nutrient supply rates, measured using in situ burials of ion-exchange membrane (Plant Root Simulator™-probes), and growth of different hybrid poplar clones. Determining the effects of different weed control practices on growth-limiting edaphic properties and subsequent seedling growth should help to support effective management strategies, in terms of selecting an efficacious and cost-effective weed control strategy that promotes the establishment and growth of hybrid poplar seedlings, while minimizing the input costs incurred by the producer.
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Keywords
nutrient supply rate, Plant Root Simulator™-probes
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Part Of
Soils and Crops Workshop