用５０ｍｇ／ｋｇ，１００ｍｇ／ｋｇ、２００ｍｇ／ｋｇ和４００ｍｇ／ｋｇ稀土喷施银杏纪苗。结果表明，１００ｍｇ／ｋｇ稀土对银杏幼苗生长有明显促进作用，而４００ｍｇ／ｋｇ稀土抑制银杏苗生长。......