中国水土保持科学2026，Vol.24Issue(4)：263-272,10.DOI:10.16843/j.sswc.2025192
不同土壤改良剂对滹沱河流域沙土的改良效果
Improvement effects of different soil amendments on sandy soil in Hutuo River Basin
摘要
Abstract
[Objective]To improve the ecological environment and sustainable development status of vegetation in the Hutuo River Basin,this study investigates the poor soil structure and weak water and nutrient retention capacity of sandy soil in the Hutuo River of Shijiazhuang city.[Methods]Through simulated experiments,five different soil water-retaining agents(attapulgite-sodium polyacrylate water-retaining agent,biochar-bentonite water-retaining agent,humic acid-type water-retaining agent,polyacrylate water-retaining agent,and starch-based SAP)were selected as research subjects to explore their improvement effects on sandy soil.Furthermore,through an orthogonal experiment,different proportions of water-retaining agent,corn straw,and biochar were added to the soil to investigate the water-and nutrient-retention effects of soil under different substrate ratios.[Results]When the dosage of the water-retaining agent was 1.0%,except for the humic acid-type and polyacrylate water-retaining agents,the soil moisture content of the other water-retaining agents was>85%,and soil electrical conductivity was>1 500 μS/cm.However,soil compaction occurred when 0.1%-1.0%of the humic acid-type water-retaining agent and 0.5%-1.0%of the starch-based SAP water-retaining agent were applied.Therefore,the attapulgite-sodium polyacrylate water-retaining agent was more suitable for the sandy soil in this region and exhibited better water retention performance.The effects of the three factors—water-retaining agent,corn straw,and biochar—on substrate soil moisture were ranked in descending order as follows:water-retaining agent>corn straw>biochar.The order of influence on substrate soil electrical conductivity was as follows:water-retaining agent>biochar>corn straw.The effect of the water-retaining agent was significant.With increasing water-retaining agent dosage,soil moisture and electrical conductivity were significantly higher than those of the control group.However,with the addition of corn straw,its effects on soil moisture content and electrical conductivity gradually decreased.When the water-retaining agent was 10 g,corn straw was 0 g,and biochar was 20 g,the soil exhibited the best water retention performance.[Conclusions]The attapulgite-sodium polyacrylate water-retaining agent exhibits the best performance.The optimal formulation for substrate water retention performance is 10 g of water-retaining agent,0 g of corn straw,and 20 g of biochar per kg of substrate,which is suitable for ecological restoration and plant growth in the sandy soil of the Hutuo River Basin.关键词
保水剂/沙地土壤/土壤含水量/种植基质/滹沱河流域Key words
water-retaining agent/sandy soil/soil moisture content/planting substrate/Hutuo River Basin分类
农业科技引用本文复制引用
刘若莎,韩晓璇,薛浩正,周子涵,戴琳..不同土壤改良剂对滹沱河流域沙土的改良效果[J].中国水土保持科学,2026,24(4):263-272,10.基金项目
河北省科技厅重点研发计划项目"滹沱河流域人工林结构优化与功能提升技术研究"(22326805D) Key Research and Development Program Project of Hebei Provincial Department of Science and Technology"Research on Structural Optimization and Functional Improvement Technologies for Artificial Forests in the Hutuo River Basin"(22326805D) （22326805D）
