设施园艺土壤的盐化与治理对策

Soil Salinization and Countermeasures in Protected Horticulture

对山东设施园艺土壤盐分状况进行了调查分析 ,结果表明 :设施栽培土壤盐化的主要原因是连年施肥量的增加 ,使设施内比设施外土壤盐分高 ,一般为露地的 1.34～ 3.74倍 ,尤其是 3～ 5年棚龄出现积盐高峰 ,电导率平均 1.2 1m s/ cm,高者达 4.0 6 m s/ cm;同时 ,土壤盐分离子也均有不同程度增加 ,其中 K+、Ca2 +、SO2 - 4 与 NO- 3增幅较大 ,大多为对照 (露地 )的 2 .1～ 2 1.5倍。该文探讨了设施园艺土壤盐化的原因 ,为持续稳定利用提供了参考。

Soil salt contents of protected horticulture in Shandong Province were analyzed. The result indicated that the increase of fertilization applied caused the soil salinization, the salt content in inner greenhouse was 1.34 [similar to] 3.74 times that in outer side, the salt peak was formatted in protected horticulture aging 3 [similar to] 5 years whose mean electric conductivity was 1.21 ms/cm, and the largest one was 4.06 ms/cm; contents of salt ions were also increased to different degree, contents of K+ Ca2+ SO42- and NO3- could be 2.1 [similar to] 21.5 times of that outside, and could increase more than others. The soil salinizing reasons of greenhouse were analyzed in this article, and the sustainable development measures were put forward.