Effects Of Different Amendmentson The Saline-alkaline Soil

Purpose of this study is to select the best amendments combination from the desulfurization gypsum,fly ash,fat,potassium,and zeolite grain. This study not only makes more efficient use of waste material, also can provide improved saline soil with the practice basis. Main method is: Through pot experiment,study the effect of these five kinds of amendments on saline soil physical and chemical properties. The main results as follows:(1)The desulfurization gypsum,fly ash,fat,zeolite,potassium granule can reduce the p H value of saline soil,the best effect is the combination of gypsum,fly ash and grease.As the extension of incubation time, soil p H value has a tendency to smaller and smaller.(2)Five kinds of material can promote the leaching of sodium ions effectively,Reduce the HCO3-content, at the same time increase the Ca2+、Mg2+、SO42-、K+ content.The best combination is gypsum, fly ash and grease.With the extension of incubation time, the trend of Na+、HCO3- are fewer and fewer, and the trend of several other salt ions is not obvious.The effect of five kinds of material on Cl- is not significant.(3)Fly ash and grease can increase the soil organic matter effectively, the best combination is gypsum, fly ash and grease, the influence of zeolite and potassium granule on organic matter is not obvious. Effect of total nitrogen, total phosphorus by the amendment in accordance with organic matter. As the extension of incubation time, the processing of saline soil alkaline hydrolysis N, available K, available P content show a trend of more and more.(4)The combination of the most conducive to improve the comprehensive fertility of soil is gypsum, fly ash and grease.