不同土壤改良剂对滹沱河流域沙土的改良效果OA
Improvement effects of different soil amendments on sandy soil in Hutuo River Basin
[目的]为了改善滹沱河流域生态环境和植被可持续发展状况,基于石家庄市滹沱河沙地土壤结构差、保水保肥能力弱的现状,通过对比不同保水剂对滹沱河流域沙地土壤的保水效果,选出最佳保水剂,并以此为基础添加不同比例的保水剂、玉米秸秆、生物炭为土壤改良材料,筛选出土壤改良的最佳基质配比.[方法]通过模拟试验,选用 5种不同土壤保水剂(凹凸棒聚丙烯酸钠保水剂、生物炭与膨润土保水剂、腐殖酸型保水剂、聚丙烯酸盐保水剂、淀粉系 SAP)作为研究对象,探索不同保水剂对沙地土壤的改良效果.并进一步通过正交试验,在土壤中添加不同比例的保水剂、玉米秸秆和生物炭,探究不同基质配比下土壤的保水保肥效果.[结果]当保水剂用量为 1.0%时,除了腐殖酸型保水剂、聚丙烯酸盐保水剂,其余保水剂土壤水分含量均>85%,土壤电导率>1 500 μs/cm.而施用 0.1%～1.0%剂量的腐殖酸型保水剂和 0.5%～1.0%剂量的淀粉系 SAP保水剂出现土壤板结.因此凹凸棒聚丙烯酸钠保水剂更适合该区域沙地土壤,保水效果较好.保水剂、玉米秸秆以及生物炭3因素对基质土壤水分的影响由大到小排列为:保水剂>玉米秸秆>生物炭.对基质土壤电导率的影响为:保水剂>生物炭>玉米秸秆.保水剂的效果显著,随着保水剂剂量的增加,土壤水分和电导率均显著高于对照组.但随着玉米秸秆的添加,其对土壤水分含量、电导率的影响逐渐降低.当保水剂 10 g,生物炭 20 g,不添加玉米秸秆,时对土壤的保水性能最好.[结论]凹凸棒聚丙烯酸钠保水剂效果最优.基质最佳保水性能配比为:每千克基质添加10 g保水剂,20 g生物炭,不添加玉米秸秆适用于滹沱河流域沙地土壤的生态修复和植物生长.
[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.
刘若莎;韩晓璇;薛浩正;周子涵;戴琳
石家庄铁道大学建筑与艺术学院,050000,石家庄石家庄铁道大学建筑与艺术学院,050000,石家庄石家庄铁道大学建筑与艺术学院,050000,石家庄石家庄铁道大学建筑与艺术学院,050000,石家庄石家庄铁道大学建筑与艺术学院,050000,石家庄
农业科技
保水剂沙地土壤土壤含水量种植基质滹沱河流域
water-retaining agentsandy soilsoil moisture contentplanting substrateHutuo River Basin
《中国水土保持科学》 2026 (4)
263-272,10
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)
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