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在田间条件下,研究了3种土壤质地与5个埋深对白刺群落主要伴生植物苦豆子、黄花矶松、沙蒿、油蒿和红砂出苗的影响,为白刺群落恢复、优良植物的筛选及其种群扩展提供理论依据与技术支撑。试验研究表明,尽管白刺群落主要伴生植物在田间的出苗率均较低,但各植物的出苗能力明显不同。土壤质地仅对伴生植物苦豆子、沙蒿和黄花矶松出苗有显著影响,而埋深处理对伴生植物出苗均有显著影响。不同土壤质地与埋深处理的平均出苗率以苦豆子最高,红砂、沙蒿和黄花矶松次之,油蒿最低;不同土壤质地的最高出苗率,沙土以沙蒿最大,沙壤土以黄花矶松最大,黏土以红砂最大;出苗适宜埋深,苦豆子为1.0～2.0cm,沙蒿、黄花矶松、油蒿和红砂为0.5cm。研究结果表明,选择适宜的植物及其人工促进技术对退化白刺固沙植被的恢复至关重要。
Under the field conditions, the effects of three soil textures and five burial depths on the emergence of Sophora alopecuroides, Artemisia fuscus, Artemisia ordosica and Artemisia sphaerocephala were studied in this paper. The results are as follows: Screening and population expansion provide a theoretical basis and technical support. Experimental studies have shown that although the emergence rate of the main concomitant plants in the field is low, the emergence ability of each plant is obviously different. Soil texture only had significant effects on the emergence of Sophora alopecuroides, Artemisia lavandula and Artemisia lanceolata, and the burial depth significantly affected the emergence of the accompanying plants. The average germination rate of different soil texture and burial depth was the highest in Sophora alopecuroides, followed by red sand, Artemisia lavandulae and Artemisia lappa, and the lowest in Artemisia ordosica. The highest germination rate of different soil texture was the highest in sandy soil with Artemisia selengensis, The largest pine, the largest clay to red sand; suitable for burial depth of seedlings, Sophora flavescens 1.0 ~ 2.0cm, Artemisia, Astragalus, Artemisia annua and red sand 0.5cm. The results show that the selection of suitable plants and their artificial enhancement techniques are crucial for the restoration of degraded white-sand barbed-sand vegetation.