改良剂对盐碱土土壤酸碱性和水分的影响研究

Research on the Improvement Effect of Improver on Saline-Alkali Soil

摘要: 通过研究磷石膏与有机肥配施对盐碱土土壤理化性质和肥力的影响，为盐碱地改良提供科学依据。本文设置不同用量的磷石膏和有机肥混合比例，监测施用改良剂后土壤的酸碱性、土壤水分变化规律。结果表明：不同用量的磷石膏与有机肥配比施用可有效降低土壤酸碱度，且PG2Y3、PG3Y2、PG3Y3处理的土壤pH值较CK显著降低0.32、0.3、0.28。一定量的有机肥可增加盆栽土壤含水率，而高量有机肥以及有机肥与磷石膏配施对土壤含水率的影响不显著。考虑到有机肥的肥料成本以及环境治理，建议将PG3Y2的改良剂施用量作为盐碱土的改良方案。

Abstract: By studying the effect of phosphogypsum and organic fertilizer on the physical and chemical properties and fertility of saline-alkali soil, it provides a scientific basis for the improvement of saline-alkali soil. This article sets up the mixing ratio of different amounts of phosphogypsum and organic fertilizer to monitor the changes in soil pH, soil moisture and fertility after applying the amendment. The results showed that the application of different amounts of phosphogypsum and organic fertilizers can effectively reduce the pH of the soil, and the pH of the soil treated with PG2Y3, PG3Y2, and PG3Y3 was significantly lower than that of CK by 0.32, 0.3, 0.28. A certain amount of organic fertilizer can increase the soil moisture content of potted plants, while the high amount of organic fertilizer and the combined application of organic fertilizer and phosphogypsum have no significant effect on the soil moisture content. Considering the fertilizer cost of organic fertilizer and environmental governance, it is recommended to use PG3Y2 as an improvement plan for saline-alkali soil.