Composition and structure of regrowth forests on abandoned agricultural landстатья
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Аннотация:Abstract: Overgrowing of agricultural land by forest in Russia is a large-scale process. This study aims to examine thecomposition and structure of forests that took over abandoned agricultural lands in Belorechensky district, KrasnodarKrai (Russia). The research on 4 farmland plots was carried out in 2018. At the time of observation agricultural land hasbeen abandoned for 7 to 8 years. Research methodology was developed to determine parameters such as tree and shrubdensity per ha, height and age at 50 m and up to 100 m from the forest. Two study sites were dominated by mesophytes,whilst the other two sites were invaded by xerophytes. Xerophytic landscapes were co-dominated by downy oaks anddog roses. The stand density of examined plants was 1.7 times lower at 51 to 100 m than near the forest (P ≤ 0.05). Therewere 3.3 times as many dog roses as downy oaks. The stand density of common ash stand at 51 to 100 m from the forestedge was 10 times lower than that of dog rose (P ≤ 0.01). Mesophytic landscapes were co-dominated by black poplarsand crack willows. Black poplar was 4.3 times more frequent than dog rose (P ≤ 0.002) and 130 times more commonthan elm (P ≤ 0.0001). Natural overgrowth or succession can affect vast areas of land. It was established that dog rosesand downy oaks regenerate xerophytic fields within 6 to 7 years, whereas mesophytic fields become dominated by blackpoplars and crack willows within 5 to 7 years