| 词汇 | peat |
| 释义 | peat noun[ U ] uk /piːt/ us /piːt/ a dark brown substance like soil that was formed by plants dying and becoming buried. It is sometimes added to ordinary garden soil to improve it and is sometimes used as fuel.泥炭，泥煤 Soil alluvial boulder clay clay clayey cover crop earthiness frozen lime loam ooze peat moss sandy sedimentation silt soil solarization solarize topsoil unploughed worm cast peat | American Dictionarypeat noun[ U ] us/pit/ partly decayed plant matter, used to improve garden dirt or as fuel Examples of peatpeat The preferred soil types ranged from peat to almost pure sand. An allotment of part of the moor was planned so that peat-cutting could continue when the rest of the moor was enclosed. A peat monolith was extracted and seen to contain three tephra layers. To be formed, raised (ombrotrophic) mires require high annual precipitations (> 2500 mm) evenly distributed through the year to protect the peat from severe oxidation. In this way the archaeological finds in the peat or on the beaches could also be dated. The topography was gently rolling, with thick peat extending in the lower parts and white sandy soils dominating in the upper parts. These gradual rises in the number of plant species reflect improved peat-forming conditions resulting from local rises of the water table. The tubs were half filled with a mixture of steamsterilized sandy loam (50%), peat (30%) and grit (20%). Slug antigens were detectable in decaying slugs on both the soil and peat for remarkably long periods, with half-lives of 8.2 and 11.5 days respectively. It is repeatedly stated that agriculture is only feasible on shallow peat. Soil samples were mixed with a sterile substratum of vermiculite and peat (2:1) until a depth of 1 cm was reached. A casing layer of peat or peat substitute is then added to stimulate the production of mushroom fruit bodies. Variables such as changes in peat depth and peat structure need to be observed closely over the long term. Therefore, species in the peat-swamp stand developed less leaf dry mass, though they sustained larger total leaf areas. Distilling made use of peat as a fuel. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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