Machine transplanting cultivation with infant seedling in rice plant, 1; Effects of different nursery soil and plumule length on the infant rice seedling for machine transplanting.
1989
Yun Y.D. | Oh Y.B. | Lim M.S. | Park R.K. | Park S.H.
The objective of this experiment was to determine if it were feasible to transplant infant rice seedlings for machine transplanting. Cultivars tested were Sobaegbyeo and Daecheongbyeo, Japonica type cultivars. Infant seedlings, young seedlings and semi-adult seedlings were raised with soil or rock wool in seedlings tray from 1986 to 1988. Infant rice seedlings raised more than 4 days after sowing with rock wool was uniform, and low in ratio of missing hill at machine transplanting. Tiller number per m** (2) was more in infant rice seedlings, young seedlings and semi-adult seedlings, in that order. Heading dates were not significantly differences among seedlings applied, however rice plant sown directly was later 4 or 5 days than any other seedlings. Panicle number per m** (2) was more in infant seedlings than in semi-adult seedlings, but ripened ratio was lower in infant seedlings due to lodging. Thus there was no great different in yield among seedlings tested. Therefore infant rice seedlings (more than 5cm in plumule length) raised for 7 days was most optimum, and rock wool would be used as a nursery soil instead of nursery soil for raising infant rice seedling in machine transplanting.
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