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首页> 外文期刊>Journal of Environmental Management >The importance of pH and sand substrate in the revegetation of saline non-waterlogged peat fields
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The importance of pH and sand substrate in the revegetation of saline non-waterlogged peat fields

机译：pH和沙质底物在盐渍非涝泥炭地植被恢复中的重要性

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A partially peat-extracted coastal bog contaminated by seawater was barren and required revegetation as a wetland. Peat fields were rectangular in shape, cambered in cross-section profile, and separated by drainage ditches. Common to all peat fields were symmetrical patterns in micro-topography with slopes between differences in elevation. Saline non-waterlogged slopes of ～5% occurred as a symmetrical pair on each side of the crest of the cambered profile, at one end of each peat field. Three rows were laid across this slope (Top, Middle, and Bottom rows) and transplanted with naturally-growing plant species with their sand substrate, in three experiments, and grown for a year. In the Spartina pectinata experiment, bare root stem sections were also planted. Another experiment was conducted to determine changes in the characteristics of a volume of sand when incubated in saline peat fields. We found the salinity of peat increased with moisture downslope, and pH decreased with increase in salinity. S. pectinata grew best when planted with its sand substrate compared with bare root stem section, and when planted in Bottom rows. Juncus balticus had excellent growth in all rows. Unexpectedly, Festuca rubra that was inconspicuous beneath the/ balticus canopy in the natural donor site grew densely within the J. balticus sods. Agrostis stolonifera grew well but seemed to show intolerance to the surrounding acidic peat by curling up its stolons. The pH of the incubated sand volume was much higher than the surrounding peat. These studies suggest that recognition of plant niches and pH manipulation are important in the revegetation of disturbed Sphagnum peatlands that are found abundantly in the northern hemisphere. Results are also relevant to the reclamation of other disturbed lands.
机译：被海水污染的部分泥炭提取的沿海沼泽是贫瘠的，需要作为湿地重新植被。泥炭地为矩形，横截面呈弧形，并由排水沟隔开。所有泥炭田的共同点是微观地形中的对称图案，其高低差之间存在斜率。在每个泥炭田的一端，弧形剖面波峰的每一侧均以对称对的形式出现了约5％的盐渍非浸水斜坡。在这三个坡度上铺设了三排（上排，中排和下排），并在三个实验中移植了自然生长的植物及其沙质底物，并进行了一年的种植。在Spartina pectinata实验中，还种植了裸露的根茎部分。进行了另一项实验，以确定在盐水泥炭田中温育时沙子体积特征的变化。我们发现泥炭的盐度随湿度下降而增加，pH值随盐度的增加而降低。与裸露的根茎部分相比，在其沙质土壤中种植时以及在底行中种植时，S。pectinata生长最快。 bal藜在所有行中都有出色的生长。出乎意料的是，在自然供体部位的波罗的海草下方不显眼的Festuca rubra在波罗的海草皮中密集生长。 Agrostis stolonifera生长良好，但通过curl缩其茎似乎表现出对周围酸性泥炭的不耐性。孵育的沙子体积的pH值远高于周围的泥炭。这些研究表明，对植物生态位的识别和pH值调节对于北半球大量发现的泥炭藓泥炭地的植被恢复至关重要。结果也与其他受干扰土地的开垦有关。

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