Publications

Effects of Ascophyllum nodosum extract application in the nursery on root growth of containerized white spruce seedlings

Abstract

In this preliminary study, Picea glauca seedlings were root drenched with a commercial liquid extract of Ascophyllum nodosum in finisher fertilizer (8N–20P–30K) at the following rates: 1:500, 1:250, 1:125, and 1:75. Fertilizer alone served as control. Applications were made four or eight times over a period of 17 or 43 days, respectively. Compared with control, all rates reduced total root system length in mid October by 44–54%. After freezer storage and then growing under favorable conditions in spring for 21 d, the 1:125 and 1:75 rates increased the number of white roots emerging from the intact peat plug by 42 and 63%, respectively.

Authors

Joanne E. MacDonald, Jen Hacking, Yuhui Weng, Jeff Norrie

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