Abstract—

A correlation between the proportions of halophyte life forms (LFs) and slope insolation in the saline soils of Samara oblast is analyzed. Perennial grasses (hemicryptophytes) are dominant in plant communities on slightly saline and nonsaline soils. These conditions give them advantages over annual grasses (therophytes) in competing for light and heat. An increase in the degree of salinity of ecotope soils in the plant community leads to a growth in the proportion of therophytes, which successfully compete with hemicryptophytes for light under these conditions. It is shown that hemicryptophytes and therophytes change the pattern of their correlation with the radiation index even within the same study area, depending on soil salinity. Regression models using slope insolation and topographic characteristics as predictors account for over 74% of the variance in the number of LF species.

中文翻译：

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太阳辐射对植物群落中盐生植物分布的影响

摘要-

分析了盐沼生物形式比例（LFs）与萨马拉州盐渍土的坡度日照之间的相关性。多年生草（半隐生植物）在生理盐水和非盐渍土上的植物群落中占主导地位。这些条件使它们在竞争光和热方面优于一年生禾草（附生植物）。植物群落中生态位土壤盐碱度的增加会导致生植物的比例增加，而生植物在这些条件下可以与半生植物竞争光。结果表明，即使在同一研究区内，根据土壤盐度，半生植物和生植物也改变了它们与辐射指数的相关关系。