Effect of Hydroxy-Al Treatment on Soil Loss and Evaluation of Effect of Soil Parameter

羟基铝处理对土壤流失的影响及土壤参数效果评价

• 批准号: 62560238
• 负责人: TAKUMA Katsutoshi
• 金额: $ 0.26万
• 依托单位: Tottori University (1988)Kyushu University (1987)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1987
• 资助国家: 日本
• 起止时间: 1987 至 1988
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-62560238/
• 关键词: Soil Loss; Physical Properties of Soil; Floculation; Sedimentation; 受食性; 凝集効果; 相対濁度

The loss of soil from agricultural land brings about not only the loss of surface soil rich in nutritive substances but also the runoff of the pesticide adhered to fine-grained soil and generates the possibility causing the contamination of water in the downstream regions. This study was conducted for the purpose of the improvement in the physical properties using hydroxy-Al, the prevention of soil loss from agricultural land and the establishment of a treament method for the flocculation and sedimentation of the soil flowing out of the agricultural land in a setting basin inclusive of fine-grained soil.The effects for improving the physical properties of heavy clay soil are markedly developed until the adding percentage of hydroxy-Al to CEC reaches 100% but not increased too much even if the adding percentage is increased within a range of 100% or more. The adding effects were confirmed in the formation of a soil aggregate, an increase in permeability and a lowering in water content, … More because not only the voids of soil but also the infiltration capacity thereof were increased and surface runoff was reduced. These phenomena result in the effects for reducing soil loss and preventing erosion. Next, soil parameters dominating the erodibility of masa soil occurring from granite being a parent rock and that of red-yellow soil occurring from a rock other than granite were cleared. The soil parameters dominating the erodibility of the Masa soil and that of the red-yellow soil are respectively mechanical composition and aggegate stability and the evaluation standard of erodibility was set using said soil parameters. 20 me/100g HCL and 0.003 me/100g hydroxy-Al imparted a good result to the flocculation effect on the red-yellow soil. 10 me/100g FeCl_3 imparted a good effect in flow but the cocentration of the red-yellow soil was only lowered to a level about 0.65 - 0.75 that at the time of no-addition and it is unreasonable to immediately promote flocculation and sedimentation in the setting basin only by the chemicals. From the foregoing, it is considered that soil loss can be prevented to a certain extent by performing the improvement in the soil of agricultural land in combination with the use of chemicals. Less

农田土壤的流失不仅会导致富含营养物质的表层土壤流失，而且会使附着在细粒土壤上的农药流失，并有可能造成下游地区水体的污染。本研究的目的是使用羟基-Al改善物理性能，防止农田土壤流失，并建立一种处理方法，用于在沉淀池中絮凝和沉淀从农田流出的土壤，当CEC中羟基铝的添加量达到100%时，重粘土的物理性质改善效果才显著但即使添加百分比在100%或更高的范围内增加也不会增加太多。在土壤团聚体的形成、渗透性的增加和含水量的降低方面证实了添加效果， ...更多信息 这是因为不仅土壤的空隙增加，而且其渗透能力也增加，并且地表径流减少。这些现象对减少水土流失、防止水土流失具有重要作用。其次，明确了花岗岩母岩上的湿润粉土和花岗岩以外岩石上的红黄壤可蚀性的主要土壤参数。控制粉砂土和红黄壤可蚀性的土壤参数分别为机械组成和团聚体稳定性，并以此为依据建立了粉砂土和红黄壤可蚀性评价标准。20 me/100 g HCL和0.003 me/100 g羟基铝对红黄壤有较好的絮凝效果。10 me/100gFeCl_3的助流效果较好，但仅使红黄壤的浓度降低到不加药剂时的0.65 ~ 0.75左右，不适宜在沉淀池中直接用药剂促进絮凝沉降。从上述情况可以认为，通过结合使用化学品对农业用地的土壤进行改良，可以在一定程度上防止土壤流失。少

项目成果

江頭和彦: Soil Sci.and Plant Nutrition. 33. 347-354 (1987)

Kazuhiko Egashira：土壤科学和植物营养。33. 347-354 (1987)

Egashira,Kazuhiko: "Size distribution and wet density of sediment eroded under simulated rainfall" Soil Science and Plant Nutrition. 33(3). 347-354 (1987)

Egashira，Kazuhiko：“模拟降雨下侵蚀的沉积物的尺寸分布和湿密度”土壤科学与植物营养。