Weeds of ruderal habitats of Gatchina (Leningrad Region)

E. N. Mysnik
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Abstract

Weeds can grow both on segetal and ruderal habitats, including outside the agroecosystems of farms. Therefore, it is necessary to study their distribution not only in the fields. The purpose of the study is to identify the species composition of weeds and its features in the ruderal habitats of Gatchina (Leningrad Region). Ruderal habitats were monitored, 78 species of weeds from 62 genera and 21 families were identified. Perennial species prevailed in life expectancy. The taxonomic structure of the species composition has been established. Five families prevailing in terms of the number of species and genera are identified. Calculation of occurrence and assessment of its constancy by classes were carried out. The occurrence of the V class of constancy has 7 species, IV class - 10 species, III class - 8 species, II class - 11 species, I class - 42 species. Groups of 25 dominant and 11 concomitant species were identified. The relationship between species compositions of weeds of ruderal habitats of Gatchina and fields of the Leningrad Region was revealed - 55.56 % of weeds dominating in the fields of the region with different occurrence were registered in ruderal habitats.
加特契纳(列宁格勒州)荒野栖息地的杂草
杂草既可以生长在独立的生境上,也可以生长在杂乱的生境中,包括农场农业生态系统以外的地方。因此,有必要研究它们不仅在田间的分布情况。本研究旨在确定加特契纳(列宁格勒州)原生栖息地杂草的物种组成及其特征。对荒野栖息地进行了监测,确定了 21 科 62 属 78 种杂草。多年生物种在预期寿命方面占优势。物种组成的分类结构已经确定。确定了在物种和属的数量上占优势的五个科。按等级计算了出现率并评估了其恒定性。出现率恒定的 V 级有 7 个物种,IV 级--10 个物种,III 级--8 个物种,II 级--11 个物种,I 级--42 个物种。确定了 25 个优势种群和 11 个伴生种群。揭示了加特契纳原生地和列宁格勒州田野杂草物种组成之间的关系 - 55.56 % 的列宁格勒州田野优势杂草出现在原生地。
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