Grazing exclusion (GE) is regarded as an effective practice to restore degraded grasslands. However, the patterns of vegetation recovery and related regulating factors in response to fencing have not been fully recognized. Hence, quantitative analysis of vegetation–soil relationships in response to GE was conducted in a semiarid grassland located on the Loess Plateau, North China. The results revealed that enclosure establishment significantly increased vegetation cover, height, and productivity but reduced plant diversity. Soil bulk density (0–20 cm) and pH (0–50 cm) clearly decreased after GE, whereas soil water (0–20 cm), organic matter (0–10 cm and 30–40 cm), and nutrient concentration (0–20 cm) increased significantly. Redundancy analysis of vegetation and environmental variables suggested that edaphic properties, including soil water, soil pH, total N, bulk density, and organic matter, was associated with plant community composition. Subsequent canonical correlation analysis indicated that soil bulk density, organic matter, and total N played an important role in shaping vegetation patterns in response to fencing whereas variations in soil pH and total N were the major contributors to variations in grazing rangeland. This work emphasized that fencing is a positive grassland management approach and suitable changes in grazing stock and soil variability are required to quantify vegetation recovery in response to grazing exclusion.

中文翻译：

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黄土高原半干旱草原放牧对土壤-植被关系的影响

放牧排除（GE）被认为是恢复退化草地的有效方法。但是，尚未完全认识到植被对围栏的恢复方式和相关的调节因素。因此，在华北黄土高原的半干旱草地上，对植被与土壤之间的关系进行了定量分析，以响应GE。结果表明，围栏的建立显着增加了植被覆盖度，高度和生产力，但减少了植物的多样性。GE处理后，土壤容重（0–20 cm）和pH（0–50 cm）明显下降，而土壤水（0–20 cm），有机质（0–10 cm和30–40 cm）和养分浓度（0 0–20 cm）显着增加。植被和环境变量的冗余分析表明，土壤，土壤，土壤，土壤，土壤，土壤，土壤，土壤，土壤，土壤，土壤，土壤，土壤，土壤，土壤，土壤，土壤，土壤，土壤，土壤，土壤，土壤，土壤，土壤，土壤，土壤，土壤，土壤，土壤，土壤，土壤，土壤，土壤，土壤，土壤，土壤，土壤，土壤，土壤等都具有一定的营养价值。土壤pH，总氮，堆积密度和有机质与植物群落组成有关。随后的典型相关性分析表明，土壤围栏密度，有机质和总氮在塑造围栏的植被格局中起着重要作用，而土壤pH和总氮的变化是放牧牧场变化的主要因素。这项工作强调说，围栏是一种积极的草地管理方法，需要对放牧种群和土壤多变性进行适当的改变，以量化因排斥放牧而引起的植被恢复。土壤总氮在围栏塑造植被格局方面起着重要作用，而土壤pH和总氮的变化是放牧牧场变化的主要因素。这项工作强调说，围栏是一种积极的草地管理方法，需要对放牧种群和土壤多变性进行适当的改变，以量化因排斥放牧而引起的植被恢复。土壤总氮在围栏塑造植被格局方面起着重要作用，而土壤pH和总氮的变化是放牧牧场变化的主要因素。这项工作强调说，围栏是一种积极的草地管理方法，需要对放牧种群和土壤多变性进行适当的改变，以量化因排斥放牧而引起的植被恢复。