Yield and quality of silage corn (Zea mays) as affected by type and quantity of N fertilization
To provide a scientific basis and guidelines for improving the production of silage corn (Zea mays) in the Bashang region,Hebei,a complete randomized block design was used to study the effects of nitrogen fertilizer types (available nitrogen,slow-release nitrogen) and quantities (180,150,120,90,60,30 and 0 kg/ha)on the yield and quality of silage corn at different growth stages.All fertilization treatments significantly (P＜0.05) increased fresh and hay yields of silage corn,and the highest yields was found in the treatment slow-release Ⅱ C,with hay yields reached to 2.45 × 104 kg/ha.Each of fertilization treatments had increased the stemleaf ratio of silage corn.All fertilization treatments had significantly enhanced soil and plant analyzer development (SPAD) values and increased crude protein content compared to no fertilization treatments (P＜0.05).In the jointing growing stage,crude protein content was significantly higher in Ⅲ (P＜0.05),but in maturity growing stage crude protein content was significantly higher in treatment slow-release ⅡB in than other treatments (P＜0.05).Compared to single applications,silage corn had higher stem-leaf ratio,crude protein content,fresh yields,hay yields and lower SPAD values with split fertilization,which was better under rainfed cultivation conditions in this region.Comprehensive consideration of both yield and quality of silage corn,we recommended the slow-release treatment Ⅱ C as the most suitable fertilization in our study.
国家科技期刊平台
NSTL
万方数据
维普
