Abstract
Soil fertilization in miniature seed orchards is important to ensure the growth and reproduction of seed trees, which are heavily damaged by seed production practices. A survey and physicochemical analysis of soil were conducted in miniature Cryptomeria japonica seed orchards at the Tohoku Regional Breeding Office, Forest Tree Breeding Center, FFPRI to determine the orchard soil properties before establishing procedures for standardized soil fertilization management. Soils were classified as typical brown forest soils and were generally rich in humus, poor in inorganic-N and available-P2O5 contents along with low degrees of base saturations compared with orchard and farmland soil values from previous reports. These results will be used to establish a concrete fertilization management plan for miniature seed orchards.
