粮-草轮作对吉林省西部盐渍化土壤的改良效果

Improvement Effect of Grain-Grass Rotation on Salinized Soil in the Western of Jilin Province

摘要:

采用田间小区试验,研究了苜蓿、玉米轮作对吉林省西部中度苏打盐碱土的培肥改良效果。结果表明:中度碱土进行粮-草轮作后,土壤物理、生物和化学性状都得到明显改善,土壤容重呈现逐渐下降的趋势,孔隙度则逐渐增加;土壤化学性质的变化表现为pH值、总碱度、交换性钠等指标下降较大,交换性钙含量增加;土壤脲酶和磷酸酶活性明显增强,玉米产量呈稳定增加的趋势。说明粮-草轮作对中度盐渍化土壤具有较好的综合培肥改良效果,适用于吉林西部盐碱土的培肥改良。

Abstract:

Field plot experiment was used to study the effect of alfalfa and maize rotation on improving fertilizer cultivation of moderate soda-salinic soil in the western of Jilin Province. The results indicated that the soil physical, biological and chemical properties were significantly improved after the grain-grass rotation in moderately alkaline soil, soil bulk density showed a gradual decline trend and porosity increased gradually. The changes of soil chemical properties showed that the pH value, total alkalinity and exchangeable sodium decreased significantly, the content of exchangeable calcium increased. The activities of soil urease and phosphatase were significantly increased, and the maize yield showed a steady increase trend. So grain-grass rotation had better comprehensive fertilizer improvement effect on moderately alkaline soil, which was suitable for the improvement of saline-alkali soil in the western of Jilin Province.