Abstract:

Decline of soil fertility and shoaling of topsoil are dominant limiting factors for high yield of crop production in northeast plain. So it has practical significance to study the effect of different ratios of organic manure and chemical fertilizer on soil physic properties and maize yield. Micro-plot positioning method was used on long-term located brown soil. The results showed that combined application of organic manure and chemical fertilizer improved soil physic properties and increased maize yield. Compared to CK treatment without fertilizer application, applying organic fertilizers could decrease bulk density by 3.05%-9.92%, and there was a significant difference between two treatments. Organic manure plus chemical fertilizer increased yield by 1.64%-8.91% than CK treatment that applied only chemical fertilizer, and increased field-moisture capacity and capillary porosity, decreased soil bulk density, and improved soil micro-aggregate structure. Provided the carbon contents were the same, maize straw was better than pig manure, and the treatment with chemical fertilizers plus high ratio of pig manure had significant effect on improving the yield of maize.