冀南地区蔬菜保护地土壤盐分积累特征

[目的]探究冀南地区蔬菜保护地土壤盐分的积累特征。[方法]以冀南地区永年县蔬菜种植区保护地和相邻露地粮田土壤为供试土壤,研究其土壤盐分积累现状和变化趋势。[结果]保护地土壤盐分含量均显著高于露地粮田土壤,且伴随种植年限呈增加的趋势;在垂直剖面上,盐分积累以0～20cm表层最为显著,随深度加深积累幅度减少;保护地与露地粮田相比,除HCO3-的含量随种植年限减少外,其他离子均有不同程度的积累,以NO3-和Ca2+的积累幅度最大。[结论]该研究为合理施肥管理和保护地土壤持续利用提供了理论依据。

Accumulation Characteristics of Salt in the Protected Vegetable Field in Southern Hebei Province

The status and change tendency of salt accumulation in the protected vegetable field in Yongnian county in Hebei Province were studied. Results showed that the content of soil salt in protected soil was significantly higher than that in opening soil and increased with the extension of cultivation time. On the spatial distribution, the accumulation degree in 0~20 cm soil layer was the highest and reduced with soil depth. While the content of HCO3- in protected soils was lower than that in neighboring crop soil, the contents of other ions were all higher than those in crop soil with different degrees, with the accumulation of NO3- and Ca2 being the highest.