黄土高原不同土地利用类型土壤含水量的地带性与影响因素

发布时间：2018-05-22 12:23

本文选题：黄土高原 + 土壤水分　；参考：《生态学报》2017年06期

【摘要】：通过对黄土高原南北样带大面积(北纬34°05'—40°75'、东经107°14'—111°09')土壤含水量(0—500 cm剖面)测定和相应植被类型调查,研究了黄土高原农田、草地、灌木林地和乔木林地4种土地利用类型土壤含水量的空间变化及它们之间的差异性。结果表明:黄土高原4种土地利用类型的土壤含水量皆呈现南北向地带性变化,自南向北土壤含水量有明显递减趋势,与多年平均降雨量、潜在蒸散量、土壤质地等的分布具有一致性;同一地点不同土地利用类型下土壤水分含量具有显著差异(农地草地灌木和乔木林地),不同植被类型根系分布、蒸散耗水量的不同是造成含水量差异性的原因。植被建设应遵循土壤水分分布规律,研究结果对黄土高原植被恢复建设具有一定参考价值。
[Abstract]:Based on the measurement of soil moisture content (0-500 cm profile) in the north-south transect of the Loess Plateau (latitude 34 掳05-40 掳75 N, longitude 107 掳14 掳-111 掳09 掳E) and the investigation of the corresponding vegetation types, the farmland and grassland in the Loess Plateau were studied. Spatial variation of soil moisture content in four land use types of shrub land and Arbor woodland and their differences. The results showed that the soil water content of the four types of land use in the Loess Plateau showed a south-to-north zonal change, and the soil moisture content decreased obviously from the south to the north, and the soil moisture content decreased significantly with the annual average rainfall and potential evapotranspiration. The distribution of soil texture was consistent, and the soil moisture content was significantly different under different land use types in the same site (farmland, grassland, shrubs, trees and woodlands, root distribution of different vegetation types, and so on). The difference of evapotranspiration water consumption is the reason of water content difference. The vegetation construction should follow the law of soil moisture distribution. The results of the study have certain reference value for vegetation restoration and construction on the Loess Plateau.
【作者单位】：西北农林科技大学水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室;西北农林科技大学资源环境学院;中国科学院大学;
【基金】：国家自然科学基金重大项目(41390463)
【分类号】：S152.7

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