Growth Characteristics and Yields of Native Summer Forage Crops as Affected by Seeding Rate in No-Tillage Paddy Fields
2023
Jung, J.S. | Choi, B.R. | Lee, S.Y. | Oh, M.R. | Park, H.S. | Choi, K.C.
This experiment was carried out to determine effects of seed rate of native grasses, called native summer forage crops (NSFC), on their growth characteristics and yields in no-tillage paddy fields in central provinces. NSFC cultivation was performed according to the agricultural guidelines of the Rural Development Administration (RDA) during 2020 to 2022. Echinochloa crusgalli ‘Jeju native’, Setaria viridis ‘Korean native type’, Digitaria sanguinalis ‘Korean native type’) were sown by various seed rate in the experimental field (3m × 4m plot) of Department of Animal Resources Development, Seonghwan–eup, Cheonan, Korea in late-May or early-June for 3 years and harvested in middle-September. Dry matter yields (DMY) in Echinochloa crusgalli and Setaria viridis increased as increasing seed rate. DMY in 40 kg ha-1 of Echinochloa crusgalli was the highest and DMY in 60 kg ha⁻¹ of Setaria viridis was the highest. However, All treatments of Digitaria sanguinalis showed similar DMY. Yields of NSFC were the order of Echinochloa crusgalli (9,681~11,092 kg ha⁻¹) ＞ Digitaria sanguinalis (8,311~9,023 kg ha-⁻¹) ＞ etaria viridis (3,145~4,749 kg ha⁻¹). The contents of crude protein in NSFC were the order of Digitaria sanguinalis ＞ Echinochloa crusgalli ＞ Setaria viridis. The contents of ADF and NDF in NSFC were the order of Echinochloa crusgalli ＞ Digitaria sanguinalis ＞ Setaria viridis. As shown in above results, we suggest that introduction of NSFC is one of the most important skills in order to stably increase yields of forage crops for utilization of the double cropping system in no-tillage paddy fields.
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