土地整治项目对渭北台塬区土壤理化特性的影响

为探究土地整治项目对土壤理化特性的改良效果,本文以宝鸡市陇县河北镇兰家堡村荒草地整治项目为例,对工程实施前、实施后耕作层土壤结构和理化特性的变化进行了分析。结果表明,土地平整工程对耕作层土壤质量的改善具有显著促进作用。通过开展土地平整工程,土壤pH值显著降低,土壤耕作层土壤pH值较工程实施前降低了3.81%。整个土壤耕作层0~30cm土层深度范围内黏粒含量较整治前提高了36.34%,0~30cm土层深度范围内砂粒含量较整治前降低了5.87%。工程实施对土壤全氮、有效磷、速效钾以及有机质含量均产生了不同程度的影响,土壤全氮含量较工程实施前提高了51.16%,土壤有效磷和速效钾在工程实施后分别较之前提高了53.0%和22.97%,有机质含量较之前高出47.72%。

Effects of Land Remediation Projects on Soil Physical and Chemical Properties in Weibei Tableland Area

In order to explore the effect of land improvement projects on the improvement of soil physical and chemical properties,this article takes the waste grassland improvement project of Lanjiabao Village,Hebei Town,Long County,Baoji City as an example,and influences the soil structure and physicochemical properties of the soil in the tillage layer before and after the project Analyzed.The results show that the land leveling project has a significant promotion effect on the improvement of the soil quality of the tillage layer.By carrying out the land leveling project,the soil pH value was significantly reduced,and the soil pH value of the soil tillage layer was reduced by 3.81%compared with that before the implementation of the project.The clay content in the depth range of 0-30cm soil layer in the whole soil cultivation layer increased by 36.34%compared with that before the remediation,and the sand content in the depth range of 0-30cm soil layer decreased by 5.87%compared with that before the remediation.The implementation of the project affected the soil total nitrogen,available phosphorus,available potassium,and organic matter contents to varying degrees.The total nitrogen content of the soil increased by 51.16%compared with that before the implementation of the project,and the available soil phosphorus and available potassium increased after the implementation of the project.53.0%and 22.97%,the organic ma tter content was 47.72%higher than before.