Potential analysis and technical discussion on multiple cropping silage corn in Liaoning

The climatic resources utilization characteristic,yield and quality advantage as well as market demand of multiple cropping silage corn were analyzed.Four key planting techniques were presented.The results of field experiment showed that Zhengdan958 and Gaoyou4515 fit for multiple cropping in Liaoning,their sowing date should not be later than July 19.Under the soil condition with more than middle level organic matter,middle nitrogen content,and lack phosphorus and potassium,appropriate fertilization amount of nitrogen(N) was 250 kg/hm2,phosphorous(P2O5) was 100 kg/hm2.Bunch planting technique(two plants per hole) could improve yield effectively,and the most appropriate density was 100 000 plants per hectare.