Abstract

The results of experiments on natural distribution of seeds of the giant hogweed (Heracleum sosnowskyi Manden.) in the winter period are presented. It was found that viable seeds are preserved on the umbrellas of this alien plant in winter. Falling of single seeds during the winter period is not much different from falling of seeds in the summer–autumn period. It was shown that seeds under the influence of various factors, in particular, under the influence of strong gusts of wind, can move up to 5 m from the mother plant. It was revealed that the seeds are also able to move together with broken umbrellas over distances many times greater than the distances of the natural scattering of single seeds. Experimental observations on the movement of umbrellas at a distance of 40 ± 9 m for 15 min suggest that the range of movement of umbrellas can be hundreds of meters on a flat surface of icy roads. The high germination of seeds left on the umbrellas allowed us to conclude that measures to control Sosnowsky’s hogweed should include the destruction of dead plants with seeds until a stable snow cover is formed.

中文翻译：

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冬季巨草（Heracleum sosnowskyi Manden。）种子的分布

摘要

大猪草（Heracleum sosnowskyi）种子自然分布的实验结果。冬季）。人们发现，冬天这种外来植物的雨伞上保存着可行的种子。冬季，单粒种子的落下与夏至秋季的种子落下没有太大区别。结果表明，在各种因素的影响下，尤其是在阵风的影响下，种子可以从母本植物中移出5 m。结果表明，种子还可以与破伞一起移动，其距离比单个种子自然散射的距离大许多倍。对伞在40±9 m的距离上移动15分钟的实验观察表明，在结冰的道路平面上，伞的移动范围可以达到数百米。