Effects of Different Organic Fertilization Modes on Yield,Quality,Fertilizer Nitrogen Utilization of Spring Maize and Nitrogen Loss from Field

To find environment-friendly fertilization modes which can increase crop yield and quality,a field experiment with spring maize was conducted to study the effects of 7 different fertilization modes on the cob's length,yield,nitrogen accumulation,fertilizer nitrogen utilization of corn and the loss of TN,NH4+-N,NO3--N from corn field under natural rainfall condition in Dongting Lake region.The results showed that:The two kinds of fertilization modes,namely,20% of the Biogas and 30% of pig-manure compost,improved agronomic properties of spring maize,increased yield by 69% and 73%,increased protein content by 42% and 36%,increased nitrogen accumulation by 125% and 117% respectively compared with no fertilization;decreased the surface runoff of TN by 25.1% and 38.3% respectively compared with the chemical fertilization mode.Thus these two modes could promote utilization rate of the nitrogen fertilizer and reduce the risk of agricultural non-point pollution,and should be widely used in spring maize production in Dongting Lake region.