土壤培肥过程中氯离子累积与分布规律研究

Soil Fertilization and Accumulation, Remove, and Distribution of Cl^- in Farmland

以陕西杨凌杜寨村为中心,沿南、西、北3条辐射线分别采取耕层和剖面土样,探讨土壤中Cl-的累积与垂直分布情况,揭示受人类生活影响历史较长的杜寨村农田土壤中Cl-的累积状况与迁移规律。结果表明,在半干旱偏湿润气候地区,由于受自然环境因素和人为因素的强烈影响,Cl-在村庄附近的土壤耕层呈现出累积趋势,随着离村庄距离的增加而明显减少;土壤剖面上Cl-的含量随着土壤深度的增加也逐渐减少;Cl-在土壤耕层虽然表现出一定的累积趋势,但累积量并不高,暂时不会影响作物的产量和品质。

This study regarded the villages as the center, collected topsoil and profile soil samples along three radiant line with the section, studied the accumulation and distribution of Cl^- in the soil profile, determined the accumulation and removing laws in the farmland affected by living and fertilization in a long history. The results showed that, in the northwest and dry region, affected by environmental and artificial factor, Cl^- in the top soil enriched around with villages, and reduced with the increase of leave along villages, Cl^- also reduced gradually along with the increment of the soil depth. Although Cl^-accumulated in top soil, the accumulated amount was not attained to the value to affect the yield and quality of crop.