喀斯特石灰土水土保持剂的筛选

发布时间：2018-05-27 06:29

本文选题：水土保持剂 + 硅酸盐黏合剂　；参考：《南方农业学报》2016年02期

【摘要】：【目的】筛选出适合喀斯特石灰土的最佳水土保持剂,为喀斯特地区的石漠化治理重建提供参考依据。【方法】基于不同植物性材料水分吸收功能的差异,制备6种配方的水土保持剂,并在人工模拟降雨条件下进行喀斯特石灰土水土保持剂筛选试验。【结果】稻草比木糠(桉树)更有利于土壤物理结构改善,添加有稻草配方水土保持剂的土壤容重比空白对照处理(CK,未施用任何水土保持剂)约降低14.0%、总孔隙度约增大13.0%、最大持水量约增加31.0%。硅酸盐黏合剂能增加地表产流量,其中以单独施用硅酸盐黏合剂的累积产流量最高(3307 m L),极显著高于其他配方(P0.01,下同),其地表产流量在降雨过程的各阶段也最高。6种配方的水土保持剂均能极显著减少土壤侵蚀,比CK分别降低了37.4%、26.1%、32.6%、47.5%、50.0%和55.9%。【结论】硅酸盐黏合剂、稻草和木糠配合使用能充分发挥出各自的土壤保持功能,且硅酸盐黏合剂、木糠(加适量甘油)、稻草(加适量甘油)按2∶1∶1比例进行配制的配方水土保持功能最强。
[Abstract]:[objective] to select the best soil and water conservation agent suitable for karst lime soil, and to provide a reference for the control and reconstruction of rocky desertification in karst area. [methods] based on the difference of water absorption function of different plant materials, Six formulations of soil and water conservation agents were prepared, and the soil and water conservation agent screening experiments of karst lime soil were carried out under artificial simulated rainfall. [results] Rice straw was better than wood bran (eucalyptus) in improving soil physical structure. The soil bulk density with straw formula soil conservation agent was decreased by 14.0, the total porosity increased about 13.0 and the maximum water holding capacity increased about 31.0% compared with the control treatment without applying any soil and water conservation agent. Silicate binders can increase surface production and discharge. Among them, the highest cumulative yield and discharge of 3307m / L of silicate binder alone was significantly higher than that of other formulations (P0.01), and the same amount of soil and water conservation agents with the highest formulation of soil and water conservation could significantly reduce soil erosion in every stage of rainfall process. 37.4% lower than CK, 37.4% lower and 32.6% lower than CK. [conclusion] silicate binder, straw and wood bran can give full play to their soil conservation function, and silicate binder. The function of soil and water conservation was the strongest when wood bran (with proper amount of glycerol) and straw (with appropriate amount of glycerol) were prepared at 2:1:1 ratio.
【作者单位】：河池市科技创新发展研究所;广西大学林学院;
【基金】：广西科学研究与技术开发计划项目(桂科攻1140002-3-4)
【分类号】：S157

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