Effects of Drainage Depths on Agronomic Characteristics, Yield and Feed Value of Silage Corn Hybrid in Paddy Field of Lowland
2015
Lee, S.M., Kyungpook National University, Sangju, Republic of Korea
This 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 0 cm, 20 cm, 30 cm and 50 cm. Tip-filling degree, ear length, and ear circle were higher in the 30 cm and 50 cm treatments compared with the other treatments (p 0.05); but the plant length, leaf length, leaf width, ear height, stem diameter, and stem hardness were not significantly different (p 0.05). The brix was higher in the order of 20 cm 0 cm 50 cm 30 cm treatment. The fresh yield, dry matter yield, and TDN yield increased as the drainage depth increased (p 0.05). The crude-protein and crude-ash content were highest in the 50 cm treatment (p 0.05), but the crude-fat, NDF, ADF, and crude-fiber levels were not significantly different (p 0.05). The total mineral content was higher in the order of 0 cm 30 cm 20 cm 50 cm treatment (p 0.05). Fructose, glucose, and sucrose were highest in the 20 cm treatment. The total amino-acid (EAA + NEAA) content was the highest in the 50 cm treatment. Based on these results, greater drainage depths increased the yield and feed value of silage corn.
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