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土壤质量动态具有复杂的时空变异性,许多自然和人为的生态过程都会显著影响土壤质量的演变,同时土壤质量自身包含众多在时空上存在显著变异和交互作用的不同属性指标,但是这些属性在土壤质量中的重要程度和相互作用机理仍然没有得到充分认识,土壤质量评价方法依然需要不断完善发展。宁夏扬黄灌区土壤质量的演变存在正反两方面的角力过程,整体、长期的发展趋势依然不明。需要系统开展不同时间尺度下土壤质量演变的规律及其发生机制等方面的研究,以丰富和深化土壤质量动态时空规律性研究,为维护灌区土壤健康与粮食安全提供理论依据。
The dynamics of soil quality have complex spatial and temporal variability, and many natural and man-made ecological processes can significantly affect the evolution of soil quality. Meanwhile, the soil quality itself contains many different attribute indexes that have significant variations and interactions in time and space. However, The importance of the quality and the interaction mechanism are still not fully understood, and the method of soil quality evaluation still needs continuous improvement and development. The evolution of soil quality in the Yanghuang irrigated area of Ningxia has both positive and negative wrestling processes, and the overall and long-term development trend remains unclear. It is necessary to systematically study the law and mechanism of soil quality evolution under different time scales in order to enrich and deepen the study of the dynamic temporal and spatial regularity of soil quality and provide theoretical basis for soil health and food security in irrigated area.