Growth Response to Soil Physical Properties and Flooding During Silage Corn Paddy Cultivation
2024
Lee, J.S. | Lee, D.W. | Seo, B.S. | Kang, I.J. | Yang, J.W. | Kim, E.Y. | Kwak, K.S. | Kim, Y.H.
The aim of this study was to investigate the response in growth and development when silage corn hybrid is grown in paddy fields compared to when it is grown in upland fields. Days to silking of silage corn hybrids cultivated in paddy fields was delayed by 8–10 days compared to those of upland fields in 2020-2021. The differences in growth and development in soil physical properties and flooding were investigated using paddy rice and horticultural bed soils to investigate the cause of the delay of flowering time in silage corn hybrids cultivated in paddy fields. When silage corn hybrid was cultivated in paddy rice bed soil with poor soil physical properties, the plant height, leaf development, and days to silking were delayed, and the underground dry weight after harvest decreased by 54%. When it cultivated in horticultural bed soil with good soil physical properties was flooded, the plant height, stem shape, and leaf development were delayed, and senescence began earlier than non-flooded corn hybrid. The growth delay and leaf senescence of silage corn hybrid by flooding increased as the flooding period increased, and the aboveground and underground dry weights of it flooded for 23 days decreased by 72.7% and 74.2%, respectively. When silage corn hybrid cultivated in paddy rice bed soil was flooded, the stem width, the number of green leaves, and aboveground dry weight significantly decreased in it flooded for more than 5 days, and the underground dry weight decreased significantly even after flooding for only 1 day. Therefore, drainage should be managed to prevent flooding, and water should be drained as quickly as possible when flooding occurs to stably cultivate silage corn hybrid in paddy fields.
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