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首页> 外文期刊>Canadian Journal of Soil Science >Long-term agricultural land use affects chemical and physical properties of soils from southwest Saskatchewan
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Long-term agricultural land use affects chemical and physical properties of soils from southwest Saskatchewan

机译：长期农业用地利用来自西南萨斯喀彻温省的土壤的化学和物理性质

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摘要

Understanding nutrient cycling under different land uses can improve agricultural management practices. In southwestern Saskatchewan, long-term land use as annual cropland, native grassland pasture, tame (planted) crested wheatgrass grasslands, or roadsides altered soil physical and chemical properties based on the intensity and frequency of disturbance, with cropland > roadsides > tame grassland > native grassland. The majority of significant differences were detected at the soil surface (0-7.5 cm); few significant differences below 15 cm suggested that the soils were not significantly different prior to changes in land use. Bulk density was increased in cropland soils compared with native grassland, probably from compaction from farm equipment, and in tame pastures due to their past use as croplands. Croplands also had decreased carbon and organic phosphorus (P) and increased Olsen P compared with grasslands, from crop removal and fertilizer inputs. Roadsides, an important but poorly studied land use in Saskatchewan, had increased clay and Olsen P concentrations compared with native grassland. Roadsides were disturbed during road building and remained disturbed because of runoff from adjacent fields and dust from roads. These results on soil chemical and physical properties, combined with soil microbiology information, will help to improve land management and nutrient use efficiency in soils of this region.
机译：了解不同土地使用下的营养循环可以改善农业管理实践。在西南部萨斯喀彻温省，长期土地用途作为年度农田，原生草地牧场，驯服（种植）冠军草原，或基于干扰的强度和频率的路线改变了土壤物理和化学性质，田间>道路>驯服草地>原生草地。在土壤表面（0-7.5厘米）检测到大部分显着差异;在15厘米以下的巨大差异表明，在土地使用变化之前，土壤没有显着差异。与天然草原相比，农田土壤中批量密度增加，可能是从农业设备的压实，以及由于他们过去的田间作为农田的驯服牧场。农作物还减少了碳和有机磷（P），并与草原相比，奥尔森P增加，来自作物去除和肥料投入。与天然草地相比，萨斯喀彻温省的一个重要但却研究的土地利用很差，含有增加的粘土和奥尔森P浓度。道路建设期间，道路赛道受到干扰，由于来自邻近的田野和道路灰尘的径流，仍然受到干扰。这些结果对土壤化学物理和物理性质，结合土壤微生物学信息，将有助于改善该地区土壤中的土地管理和营养利用效率。

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