Agronomic characters and feed value of corn infected by rice black-streaked dwarf virus
1988
Lee, S.S. | Lee, J.M. | Choi, S.J. (Youngnam Univ., Kyonsan (Korea R.). Coll. of Agriculture and Animal Science)
Several agronomic characters, feed value, and mineral uptake of two corn hybrids infected by different degrees of rice black-streaked dwarf virus (RBSDV) were studied at the south-eastern part of RBSDV prevalent areas in Korea. Although both hybrids were infected with RBSDV by 100%, culm length of Suwon 19 was more severely reduced than that of Jinjuok and there were positive correlations between culm length and top dry weight of individual plants. The reduced culm length was largely due to the shortened length of upper five internodes in both hybrids and also due to the reduced number of internodes in Jinjuok. As culm length reduced, percent ear-bearing plants, average ear weight, and number of kernels per ear reduced significantly in both hybrids. The kernel weight of Suwon 19 decreased with reduced culm length, but that Jinjuok was similar among the different culm lengths. However, as culm length decreased, crude protein and fiber in whole plants and N, P, K, Mg in culm-leaf sheath increased, but nitrogen free extract in whole plant decreased. And crude fat in whole plant and N, P, K, Mg concentrations in leaf blades and ear were similar among the culm lengths
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