Effects of Slow-Released Fertilization with Nitrogen Reduction on Biomass Yield,Nitrogen Utilization,and Soil Balance of Silage Maize in Hilly Areas
The effects of slow-released fertilization with nitrogen reduction on the biomass yield,nitrogen utili-zation and balance of silage maize were studied with three treatments:Conventional Fertilization(CF),Slow-Re-leased Fertilization with Nitrogen Reduction(RF)of 15％and No Nitrogen Fertilization(CK).Results showed that the biomass yield of RF treatment was 43.7％higher than that of CK treatment significantly,and 6.96％higher than that of CF treatment non-significantly.Compared with CK treatment,RF treatment significantly increased the dry matter weight per plant and the dry matter accumulation of various organs in the main growth stages,and increased the dry matter proportion of panicles and leaves,but there was no significant difference between RF treatment and CF treat-ment.Compared with CF treatment,RF treatment significantly increased nitrogen partial productivity,agronomic ef-ficiency,and nitrogen fertilizer utilization efficiency.Except that the nitrogen balance of CF treatment was in sur-plus,the nitrogen balance of other treatments were in deficit,but the nitrogen deficit of RF treatment did not exceed the threshold.Therefore,the application of controlled-release fertilization with 15％nitrogen reduction in silage maize cultivation achieved stable biomass yield,improved nitrogen fertilizer utilization efficiency.
Silage maizeSlow-released fertilization with nitrogen reductionBiomass yieldSoil nutrient bal-ance
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