Abstract: Directing at the physicochemical property of saline soil in Songyuan Qianan of Jilin Province, this paper discussed the feasibility of improving saline soil by mushroom bran through taking edible mushroom bran as substrate to composite new organic-inorganic complex modifier to improve saline soil. This paper took mushroom bran as substrate, added chemical gypsum and aluminum sulfate, and studied the result of saline soil improvement by complex modifier via carrying out soil culture experiment. The results indicated that the complex modifier could better improve the physicochemical property of saline soil, significantly reduce alkali, and the soil bulk descended with the increase of mushroom bran dosage, the number of soil micro aggregates (0.25~1 mm) was significantly increased, while the soil pH, content of sodium exchange and total alkalinity decreased gradually. The content of total salt in soil showed a tendency of first reducing gradually then slightly increasing. In this experiment, the complex modifier had fewer infect on soil cation exchange quantity. The ratio of various additives with 66% mushroom bran, 26% gypsum and 8% aluminum sulfate had the best improvement effect. Through studying the effect of complex modifiers, important references was provided for the improvement of saline alkali soil in western areas of Jilin Province.

Key words: mushroom bran, complex modifier, saline soil, improvement effect

摘要： 针对吉林松原乾安盐渍土的理化性质，通过研究食用菌菌糠作为基质的新型复合改良剂对盐渍土的改良效果，探讨菌糠改良盐渍土的可行性。以菌糠为基质，添加石膏和硫酸铝，通过土培试验研究复合改良剂对盐渍土改良效果的影响。结果表明：复合改良剂能较好地改善盐渍土的理化性质，降碱作用明显；随菌糠用量的增加，土壤容重下降，土壤微团聚体（0.25～1 mm）数量明显增加，土壤pH、交换性钠含量和总碱度都逐渐下降。土壤总盐含量呈先逐渐降低、后略有升高的趋势。复合改良剂对土壤阳离子交换量的影响不是很大，各添加物的比例菌糠66%、石膏26%、硫酸铝8%的改良效果最好。通过复合改良剂组方效果研究，为吉林省西部盐渍碱土改良提供重要的参考依据。

关键词: 菌糠, 复合改良剂, 盐渍土, 改良效果