Abstract: Based on randomized block experimental design,a field experiments was conducted to investigate the effects of different nitrogen fertilizer,high efficiency organic fertilizer and amendments on wheat yield,maize yield and soil fertility in the rotation system of wheat and maize on coastal saline areas.The aim of these experiments was to providing a certain theoretical guidance about soil fertility and crop yield in coastal saline soil.The results showed that the application of nitrogen fertilizer,high efficiency organic fertilizer and amendments could increase grain yield of wheat.And the yield increased 9.52%-29.52%,2.30%-17.82%,2.19%-11.48% respectively.The application of nitrogen fertilizer,high efficiency organic fertilizer could increase grain yield of maize,and the yield increased 29.37%-45.74%,1.69%-11.15% respectively.There was obvious yield increasing effect on corn yield after wheat amendments,and the yield increased 3.50%-8.33%.Application of nitrogen fertilizer,high efficiency organic fertilizer and amendments had a significant effect on improving soil fertility in coastal saline soil.O3(N₂O₃A₂) had the highest available nitrogen,available phosphor,available potassium content in all treatments;Application of amendments increased soil organic matter content and decreased the soluble salt contents in soil.Under the conditions of this experiment,the highest wheat and maize annual production reached 16 770.46 kg/ha,which obtained by mathematic simulation,and the optimum economic amounts of nitrogen fertilizer,organic fertilizer and amendment were 763,2 250,3 167 kg/ha,respectively.Therefore,in order to obtain high yield and get higher economic efficiency,we should pay attention to combine application among nitrogen fertilizer,high efficiency organic fertilizer and amendments in the rotation system of wheat and maize on coastal saline areas.

Key words: Coastal saline soil, Rotation system of wheat and maize, Soil fertility, Fertilization effects mode

CLC Number: 

• S158.5