Comparison of Agronomic Performance of Introduced Corn Hybrid for Silage Production I. Performance of hybrids in different regions

도입 사일리지용 옥수수의 생육특성 및 생산성 비교 I. 지역별 생육특성 및 생산성

The agronomic performance of four introduced corn(Zea mays L.) hybrids and a domestic hybrid Suwon 19(control) was compared for silage production in the Middle Northwestern Coast(MNWC). Middle Southwestern Coast(MSWC) and Middle Northern Inland(MN1) regions of Korea, 1988 to 19 90. In the MNWC region, DK713 and P3144W were recorded as more resistant corn hybrids to rice black streaked dwarf virus(RBSDV) than other hybrids. P3144W, P3352 and DK689 hybrids produced higher dry matter(DM) and total digestible nutrient(TDN) than the control hybrid Suwon 19 and DK 713. In the MSWC region, P3144W and DK689 tended to yield more DM and TDN than other hybrids and a severe infection of RBSDV was observed during 3 years of experiment. In the MNI region, P3144W and P3352 corn hybrids showed higher ear and dry matter percentage and gave the highest DM and TDN yield compared with other hybrids. The RBSDV infection of the hybrids in the MNI region was moderate level compared with the two regions, but rate of stay green was the lowest. In the three regions, the control hybrid Suwon 19 gave the highest RBSDV infection, followed by P 3352, DK689, and P3144W, while DK713 was the lowest. P3144W and P3352 hybrids gave higher DM and ear percentages than all other hybrids at harvest. During 3 years of experiment, it was found that there were regional and year differences in RBSDV infection, forage DM yield, DM percentage and ear ratio to total DM yield of the corn hybrids.