The effects of different treatments on Cupressus chengiana seedling growth were studied by a pot experiment with 2 N-fertilizer levels and 4 moisture gradients.Results showed that at the 15% and 25% moisture gradients

N-fertilizer restrained the height of seedlings and low N-fertilizer level had more significant influence;at the 5% moisture gradient

low N-fertilizer level slightly reduced the height and however

high N-fertilize level slightly increased the height;and at the 30% moisture gradient

the height increased with the increased quantity of N-fertilizer.At all the moisture gradients

N-fertilizer significantly increased the basal diameter of seedlings and high N-fertilizer level had more significant influence.N-fertilizer reduced the the height-diameter ratio of seedlings;at the 5% and 15% moisture gradients

high N-fertilizer level had more significant influence;and at the 25% and 30% moisture gradients

low N-fertilizer level had more significant influence.High N-fertilizer level reduced the root-shoot ratio of seedlings at all the moisture gradients;low N-fertilizer level reduced the ratio at the 5% and 30% moisture gradients

while increased the ratio at the 15% and 25% moisture gradients.At the 5% moisture gradient

N-fertilizer slightly increased the quality index of seedlings and the low N-fertilizer level had more significant influence;at the 15% moisture gradient

low N-fertilizer level slightly increased the index and high N-fertilizer level slightly reduced the index;and at the 25%

30% moisture gradients

the index increased with increased quantity of N-fertilizer.