种植首蓿对陕北矿区盐碱地改良作用的研究

打开文本图片集

中图分类号：S541 文献标识码：A 文章编号：0488-5368（2025）06-0052-05

Abstract：To promote the utilization of saline-alkali land resources and improve the saline-alkali soil in the mining areaof northern Shaanxi Province，a pot experiment was conducted to investigate the efects of alfalfa cultivationunder diffrent ratios of fertilizationonthesoil'sphysicochemical properties.The studyaims to provide theoretical support forimproving saline-alkalisoilsthrough alfalfa planting.Six treatments were designed：no fertilizer（CK）， 100% chemical fertilizer（Et-1）， 75% chemical fertilizer +25% bio-organic fertilizer（Et2）， 50% chemical fertilizer +50% bio -organic fertilizer （Et-3）， 25% chemical fertilizer +75% bio -organic fertilizer （Et-4） ，and 100% bio - organic fertilizer （Et -5）. The results of the pot experiment were as follows：（1）The physicochemical properties of soils with alfalfa plantingand fertilization difered significantly fromthose of the control group.Compared with theCK group，the soil bulk density in Et-1，Et-2，Et-3，

Et-4，and Et-5 decreased by 5.86% ， 4.10% ， 8.84% ， 0.57% ，and 6.21% ，respectively.Soil moisture content increased by 21. 43% ， 35.71% ， 64.29% ， 60.71% ，and 57.14% ，respectively，and soil pH decreased by 4.39% ， 3.88% ， 3.74% ， 5.70% ，and 6.68% ，respectively.（2）Planting alfalfa effectively increased soil organic mater and nutrient content.Compared with the CK group，the soil organic matter content in the treatment groups increased by 29.92% ， 46.12% ，and 64.90% in August，September，and October，respectively.

Key words： Bio -organic fertilizer;Saline land; Alfalfa;Physical and chemical properties of soil

我国的盐渍化土地的总面积大约为9910万hm2[1] ，盐碱地面积在世界上排名第三[2]，且广泛分布于东北、华北、西北和沿海地区[3]。（剩余4358字）