Study on fertilizer conservation properties of bentonite and licorice residue composite material

To improve the utilization rate of fertilizers in Xinjiang,improve the soil to reduce the loss of nutrients in sandy soils,poor salt tolerance resulting in soil pollution,and other problems,prepared a new ecological friendly fertilizer to reduce the usage of high cost polymer fertilizer products in the market,described the effects of bentonite and licorice residue on fertilizer conservation and its application prospects.Natural,inexpensive and environmentally bentonite and licorice residue are used as raw materials,and using the indoor soil column simulation method to combine both bentonite and licorice residue composite materials in different proportions,discuss the ability of sandy soil in different ratio of composite materials and pure sandy soil( CK),to keep fertilizer and the best matching scheme.The results showed that the addition of licorice residue could effectively regulate the basic physicochemical properties of bentonite.In the three groups of tests,in which the weight of bentonite and licorice residue composite material accounted for 10%,15% and 20% of the pure sand,the fertilizer conservation effect increased with increase in the proportion of bentonite in the composite material,T1> T2> T3> T4>CK,when the weight of composite material accounted for 15% of the pure sand,T1 treatment had the best effect on nitrogen and potassium conservation,and the best phosphorus conservation effect was achieved by T2 treatment at 20%. The composite material prevent loss of N,P,K,compoundconservative fertilizer applied into the soil,improves water absorbtion and reduce nutrient loss,it also improve nutrient utilization,protectenvironment,make full use of waste resources,turn waste into treasure,and provide theoretical basis for improving sandy soil by using bentonite in arid and semi-arid areas.