Effect of Varieties and Seeding Date on Over Winter and Dry Matter Yield of Italian Ryegrass in Paddy Field
2009
Kim, M.J., Hanwoo Experiment Station, National Institute of Animal Science, RDA, Pyeongchang, Republic of Korea | Choi, K.J., National Institute of Animal Science, RDA, Cheonan, Republic of Korea | Kim, J.G., National Institute of Animal Science, RDA, Cheonan, Republic of Korea | Seo, S., National Institute of Animal Science, RDA, Cheonan, Republic of Korea | Yoon, S.H., National Institute of Animal Science, RDA, Cheonan, Republic of Korea | Lim, Y.C., National Institute of Animal Science, RDA, Cheonan, Republic of Korea | Im, S.K., Hanwoo Experiment Station, National Institute of Animal Science, RDA, Pyeongchang, Republic of Korea | Kwon, E.G., Hanwoo Experiment Station, National Institute of Animal Science, RDA, Pyeongchang, Republic of Korea | Chang, S.S., Hanwoo Experiment Station, National Institute of Animal Science, RDA, Pyeongchang, Republic of Korea | Kim, H.C., Hanwoo Experiment Station, National Institute of Animal Science, RDA, Pyeongchang, Republic of Korea | Kim, T.I., Hanwoo Experiment Station, National Institute of Animal Science, RDA, Pyeongchang, Republic of Korea
This experiment was carried out to investigate the effect of cultivar and seeding date on the winter survival rate, quality and DM yield of Italian ryegrass on paddy field for three years in Suwon. Seeding started from 30th Sep. 2003. at intervals of five days and finished 20th Oct. New varieties of Italian ryegrass used in this experiment were "Kospeed", "Kowinmaster" and "Hwasan 101". The winter survival average rate of 5th Oct. seeding plot was 89.8% and it decreased with delayed seeding date. The heading date of "Kospeed" was 7th~13rd May, "Kowinmaster" was 16th May, but "Hwasan 101 ho" didn't show heading until 17th May. Dry matter (DM) yields of 30th Sep. seeding plot were Kospeed 7,909 ㎏/㏊, Kowinmaster 6,398 kg/ha and Hwasan 101 ho 5,204 kg/ha. DM yield was decreased with delayed seeding date. Total digestible nutrient (TDN) yield was also decreased with delayed seeding date. Crude protein (CP) content was the highest in Kospeed. seeding plot as 18.3% and in vitro dry matter digestibility (IVDMD) was not showed significant difference among seeding dates.
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