Abstract: The objective of the test is to reveal the effects of long-term manure and its combination with nitrogen fertilizer on nitrogen mineralization of non-calcareous fluvo-aquic soil,and exploring the relationship between crop yield and mineralization.Based on the long-term fertilization test in Laiyang,Shandong Province,which was started in 1978,the effect of long-term fertilization on nitrogen mineralization was studied by ISC-IERB(In-situ Soil Core and Ion Exchange Resin Bag),and the correlation analysis between the crop yield and the mineralization was carried out.Long-term application of organic manure and nitrogen fertilizer could significantly increase the non-calcareous soil total nitrogen,mineral nitrogen,net nitrogen mineralization,nitrogen uptake and yield of winter wheat or summer maize,and in the same manure(or nitrogen fertilizer) level,the increase of the amount of nitrogen fertilizer(or manure) was increased,among these,the increase of M₂N₂(combined application of high amount of manure and high amount nitrogen fertilizer) was the highest,and the yield of winter wheat and summer maize respectively were 6 803,11 935 kg/ha;long-term fertilization in summer maize season soil nitrogen net mineralization,net nitrogen mineralization rate was significantly greater than the winter wheat season,the increase of fertilization treatment were 7.1%-62.7%,16.2%-76.0%;the correlation analysis showed that the yield of winter wheat and summer maize and pre sowing soil total nitrogen,mineral nitrogen content,net mineralization of nitrogen was significantly relativity,but not significantly relativity with nitrogen leaching amount.Application of organic manure and nitrogen fertilizer is an effective means to increase the potential of soil nitrogen supply,plant and season is an important factor to affect the mineralization of soil nitrogen.

Key words: Long-term fertilization, Soil nitrogen, Nitrogen mineralization, Crop yield

CLC Number: 

• S158

• S143.1