2017 Volume 62 Pages 47-50
The utility of horse manure compost as substitute culture soil for the raising seedling of paddy rice raising were evaluated at the point of the growth of the transplanting seedling and the characteristic as the culture soil. The commercial culture soil, the horse manure compost and the controlled horse manure compost which was adjusted to appropriate pH were used as seedling culture soil. The seedling growth of the controlled horse manure compost was slightly inferior to that of the commercial culture soil, but the seedling grew enough so as to be able to transplant. The strength of the seedling mat was in the order of the commercial culture soil = the horse manure compost > the controlled horse manure compost, but the seedling strength of the controlled horse manure compost was enough for transplanting work. Therefore, we considered that the horse manure compost is useful for the raising seedling material of rice, because the weight of seedling box of horse manure plots, which was filled with the horse manure compost or the controlled horse manure compost, were remarkably lighter than that of the commercial culture soil.