Effect of NExponentialFertilization on Growth and Nutrient Accumulation Of TaxodiumdistichumSeedlings

On April 1, 2016, 1-year Taxodiumdistichumseedlingswere potted at greenhouse in Tongxiang, Zhejiang province.They were treated by conventional fertilization (CF, 5.0 g/seeding), Nexponential fertilization of EF1 (1.0 g), EF2 (3.0g), EF3 (5.0 g) and EF4 (8.0 g)with randomized blocks design. Nitrogen application was designed 5 times with interval of 30 days. On October 20 of the current year, seedling height, ground diameter, biomass and nutrient content was determined by whole harvest method. The result demonstrated that seedlings with treatment ofEF3 had evident higher height than that of CF and that of ground diameter withEF2 was the same. Above-ground,underground and total biomass of seedling with treatment of EF2increased by 42.9% ,44.3% and 43.5 from（P<0.05）compared with that ofCF. N accumulation of underground part of seedlings treated by EF increased by 37.5%-86.6%, compared with that by CF. N and Kaccumulationof above-ground parts of seedlings treated by EF1, EF2 and EF3wasevidently higher than that by CF (P<0.05). P accumulation in seedlings treated by EF and K accumulation in underground part of thattreated by EFwashigher than that by CF (P<0.05).The experiment resulted that exponential nitrogen had significant effects on the growth of T.distichumseedlings, especially the treatment of EF2.