Abstract

Changes in the soil cover and biological properties of ordinary chernozems in the natural succession on fallow lands differing in their age have been studied in Rostov oblast. With an increase in the duration of fallowing, the species diversity of the plant cover and the humus content in soil increase, while the relative restoration rate of soil biological properties decreases. During a 83-year-long period of fallowing, the soil compaction increased, the density decreased by 15%, and pH dropped from 8.1 to 7.3. The humus content in the topmost 10 cm increased by 2.4 times and the invertase activity, by 2.3 times, while of the activities of peroxidase and polyphenol oxidase became smaller. The integral index of the soil biological status on t 27- and 83-year-old fallow lands increased by 32 and 45%, respectively, in comparison with the cropland.

中文翻译：

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后农业时代黑钙土植物覆盖率和生物学特性的变化

摘要

罗斯托夫州研究了不同年龄的休耕土地上天然黑钙土的自然演替中土壤覆盖率和生物学特性的变化。随着休耕时间的延长，植物覆盖物的物种多样性和土壤腐殖质含量增加，而土壤生物学特性的相对恢复率降低。在长达83年的休耕期中，土壤压实度增加，密度降低15％，pH值从8.1降至7.3。最上层10 cm的腐殖质含量增加了2.4倍，转化酶活性增加了2.3倍，而过氧化物酶和多酚氧化酶的活性变小。与耕地相比，在27岁和83岁的休耕地上，土壤生物状况的整体指数分别增加了32％和45％。