2020 Volume 82 Issue 5 Pages 497-504
To save seeds over the same planting area as that of conventionally sown broadcast seedlings, arrayed mat seedlings were prepared by sowing seeds in 26-furrow arrays on coco-peat mats, transplanted with the use of a conventional 8-row transplanter and grown along the broadcast (control) seedlings. The arrayed seedlings were prepared with 40 % less seeds than were the control and their foliar ages were 3 to 4 at transplanting. Neither seedling was suitable for a 7 mm-vertical feed in terms of missing hills at transplanting. The arrayed seedlings at transplanting missed 11.3 % and 6.3 % of hills in the 10 and 13 mm-vertical feed, respectively, but they were still larger than those in the control (9.0 % and 3.3 %). With the arrayed seedlings, the hill mortality during the growth period was low (＜5 %) and the grain yield was 500 g/m2, which were not different from the control.
