Effects of applied fertilizer and planting density of Angelica acutiloba Kitagawa as methods to hasten seedling raising
2019
Komeda, K. | Asao, H.
We investigated the effects of amounts of applied fertilizer and planting density on the number of superior seedlings (5-8 mm root-head diameter) of Angelica acutiloba Kitagawa grown with a method to shorten the seedling raising period. Applying twice the conventional amount of 10 g/square m nitrogen component fertilizer did not influence the root-head diameter or seedling number. Consequently, increasing superior seedlings merely by increasing the amount of fertilizer is regarded as difficult. However, lower planting density than the conventional 10,000 plants/square m markedly increased the seedling root head diameter and superior seedling number despite the decreased number of total seedlings. Results demonstrate that significantly more superior seedlings were obtained with 1250-2500 plants/square m. An estimated 750 superior seedlings/square m can be achieved: a 7 square m seedling bed was needed to plant a 10 a field.
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