Effect of Weeds on the Survival and Growth of Scots Pine Seedlings
Weeds are one of the most serious problems in growing high-quality seeding material in the open ground in forest nurseries. About 100 weed species were found in the fields of 11 forest nurseries in Republic of Karelia (Russia). The species can be formally divided into three groups according to morphological characteristics and damaging capacity: (1) annual and biennial herbs, (2) perennial weeds with the bulk of the underground organs in the upper soil layer, and (3) perennial weeds with deeplying root system. The effects of weeds on the seedlings can be divided into direct (physical damage) and indirect through redistribution of nutrients and water, as well as through stimulation or inhibition of microorganism development in the soil.
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Author(s): A. M. Kryshen
Publication: Tree Planters' Notes - Volumes 51, Number 1 (2005)
Volume: 51
Number: 1
