Effects of Long-term Fertilization on Soil Nutrition and Crop Yield

Long-term fertilization trial has been executed for 18 years, effects of different fertilizers on Albic soil nutrition and Crop yield were studied and reported in this paper. The results indicated that the application of fertilizers could improve the content of organic matter,available-P and available-K in soil. Under the condition of long-term fertilization and rotation, the variety trend of content of organic matter and total-P was TSOMNPCK, and content of total-N and available-K was OMTSNPCK. The change of soil nutrition depended on different crops succession. Under the condition of crop rotation and succession, the variety trend of available-P was OMNPTSCK. The crop yield was increased in a large extent by fertilization and the effect of application of manure was the biggest. Compared to no fertilizer treatment, the crop yield of rotation and succession were increased 118.7%～175.8% and 129.7% respectively. The effects of straw and chemical fertilizer on yield were corresponsive but lower than manure. On the other hand long-term no fertilization could make the crop yield at a lower level. In total, the effect of application of organic manure was better than chemical fertilizer and crop straw.