西北林学院学报2025，Vol.40Issue(3)：171-178,8.DOI:10.3969/j.issn.1001-7461.2025.03.20
生态输水对青土湖白刺灌丛沙堆土壤水分及质地的影响
Effects of Ecological Water Transfer on Soil Moisture and Texture of Nitraria tangutorum Nebkhas in Qingtu Lake
摘要
Abstract
To explore the effects of ecological water conveyance on soil moisture,physical properties and function of Nitraria tangutorum nebkhas,so as to provide scientific support for correctly evaluating the ec-ological benefits and vegetation conservation of ecological water transport in Qingtu Lake.The changes of soil moisture and particle size composition of Nitraria tangutorum nebkhas at different distances from the water surface,different sites and different soil depths after ecological water conveyance in Qingtu Lake were studied and analyzed.The results showed that:1)After the ecological water conveyance of Qingtu Lake,the soil water content in different sites of Nitraria tangutorum nebkhas was different.The soil water content of the nebkhas in the upper site was the highest,with an average of 9.621％,and it was the lowest in the middle part,which was 5.692％.It was 3.929％in the upper site higher than in the middle site.The water content of different soil depths in Nitraria tangutorum nebkhas was different.The water content of 0-5 cm was the lowest,with an average of 7.206％,and that of 40-60 cm was the highest,10.147％,with a difference of 2.941％.In the soil depth of 0-60 cm,the water content increased with the depth in-creasing.In the range of 0-250 m from the edge of the water surface,the soil water content of Nitraria tangutorum nebkhas gradually decreased with the edge distance increasing.When the distance was 0 m,the water content was highest,which is 17.084％,and the lowest was 2.498％at 250 m from the edge.The difference was 14.586％,and it tended to be stable after 250 m.2)The soil particles of Nitraria tanguto-rum nebkhas in Qingtu Lake were mainly fine sand,the content was 64.215％-74.563％.The content of clay and silt was low which was 4.391％-10.699％,and the content of coarse sand was 19.856％-25.087％.The content of fine sand in the middle and upper site of Nitraria tangutorum nebkhas was high-er than that in the lower site and between nebkhas,while the content of clay powder and coarse sand in the lower site and flat ground was higher than that in the middle and upper site.3)The soil particle size of Ni-traria tangutorum nebkhas with different distances from the water surface edge was mainly fine sand,the content was between 66.025％and 77.645％,coarse sand was 12.418％-32.298％,powder particle was 1.077％-9.129％,and clay content was the lowest,which was 0.034％-2.140％.In the range of 0-300 m from the water surface edge,with the distance increasing from the water surface edge,the basic trend was that the content of fine sand and clay silt decreased gradually,and the content of coarse sand increased gradually.The soil particles in different soil layers of Nitraria tangutorum nebkhas were mainly fine sand,followed by coarse sand,and the clay content was the lowest.The basic trend was that the content of fine sand,silt and clay in surface layer was higher than that of deep layer,while the content of coarse sand was slightly higher than that of surface layer.4)The distance from the water surface edge and the position of Nitraria tangutorum nebkhas had a significant effect on the soil fractal dimension.The maximum fractal dimension of each soil layer appeared at 0-50 m from the water surface edge,which was between 2.339-2.469.With the distance increasing from the water surface edge,the fractal dimension of each soil layer changed irregularly.The soil depth of Nitraria tangutorum nebkhas had no significant effect on soil fractal dimension.关键词
白刺灌丛沙堆/土壤水分/土壤颗粒Key words
Nitraria tangutorum nebkhas/soil moisture/soil particle分类
农业科技引用本文复制引用
于永明,刘淑娟,袁宏波,安富博,刘虎俊..生态输水对青土湖白刺灌丛沙堆土壤水分及质地的影响[J].西北林学院学报,2025,40(3):171-178,8.基金项目
国家自然科学基金项目(32060371). （32060371）
