Effects of Drainage Depths on Agronomic Characteristics, Yield and Feed Value of Silage Corn Hybrid in Paddy Field of Lowland

Sang Moo LeeDepartment of Animal Science, Kyungpook National University, Sangju-Si 742-711, KoreaABSTRACTThis study was carried out to investigate the growth characteristics, yield, and chemical compositions of corn hybrids for silage according to the drainage depths in a lowland paddy field. The experimental design was arranged in a randomized block design with four treatments and three replications. The drainage depths of the four treatments were 0cm, 20cm, 30cm and 50cm. Tip-filling degree, ear length, and ear circle were higher in the 30cm and 50cm treatments compared with the other treatments (p 0cm>50cm>30cm treatment. The fresh yield, dry matter yield, and TDN yield increased as the drainage depth increased(p 30cm>20cm>50cm treatment(p<0.05). Fructose, glucose, and sucrose were highest in the 20cm treatment. The total amino-acid(EAA+NEAA) content was the highest in the 50cm treatment. Based on these results, greater drainage depths increased the yield and feed value of silage corn.(Key words :Silage corn, Drainage depth, Yield, Nutritional components)