Decay-resistant paper

A raising seedling pot made of a base paper for a raising seedling pot comprising a decay-resistant paper that comprises a cellulose fiber-containing paper and a carboxylic acid crosslinking agent, wherein the cellulose fiber is at least partially bonded to the carboxylic acid crosslinking agent,

• the carboxylic acid crosslinking agent is at least one compound selected from the group consisting of citric acid, iminodisuccinic acid, maleic acid, fumaric acid, oxalic acid, malonic acid, succinic acid, adipic acid, and salts of these, and
• the carboxylic acid crosslinking agent is contained in an amount of 7.5 to 20.0% by mass relative to the dry mass of the decay-resistant paper,
• wherein a crosslinking catalyst is contained in an amount of 10 to 30% by mass relative to the mass of the carboxylic acid crosslinking agent,
• an enzyme decay resistance index is calculated by [post-enzyme treatment tensile strength/wet tensile strength (standard)]×100 and the enzyme decay resistance index for the base paper for a raising seedling pot is 85 or more,
• the wet tensile strength (standard) is measured as follows:
• the humidity of a test sample of the decay-resistant paper is controlled by the method specified by JIS P8111:1998 (standard atmosphere for conditioning:
• 23° C.±1° C., (50±2)% r. h.);
• the test sample is then immersed in water (temperature:
• 20° C.±5° C.) for 24 hours;
• and the test sample is measured by the method according to JIS P8113:1998 “Paper and board—Determination of tensile properties—Part 2:
• Constant rate of elongation method”, and
• the post-enzyme treatment tensile strength is measured as follows:
• a test sample of the decay-resistant paper is continuously treated for 72 hours in an incubator (45° C.) containing an enzyme liquid prepared so as to contain cellulase at a concentration of 1% and to have a pH of 5.0;
• after completion of the treatment, the test sample is washed with water;
• and the test sample is measured by the method according to JIS P8113:1998 “Paper and board—Determination of tensile properties—Part 2:
• Constant rate of elongation method”.