Poplar special fertilizer and application method thereof

[0013] This example is applicable to the black poplar series varieties. The tested black poplar varieties include: American black poplar, Italian poplar, etc.; the substances and contents (weight %) of each component are:

[0014] Monoammonium phosphate 20%, urea 20%, ammonium sulfate 10%, potassium sulfate 7%, superphosphate 8%, diphosphoric sulfate 8%, nitrogen 10%, potassium oxide 10%, trace elements 5%.

[0016] This example is applicable to poplar series varieties, and the experimental varieties include big-leaf white poplar, Chinese silver gray poplar, and Beilin triploid white poplar.

[0017] The substances and contents (% by weight) of each component are:

[0018] Monoammonium phosphate 25%, urea 25%, ammonium sulfate 11%, potassium sulfate 8%, superphosphate 9%, diphosphoric sulfate 9%, nitrogen 11%, potassium oxide 11%, trace elements 6%.

[0020] This example is applicable to the series of poplar varieties, and the experimental varieties include Populus Erbai, Populus Northeast, and Populus bitteri.

[0021] The substances and contents (% by weight) of each component are:

[0022] Monoammonium phosphate 30%, urea 30%, ammonium sulfate 12%, potassium sulfate 9%, superphosphate 10%, diphosphoric sulfate 10%, nitrogen 12%, potassium oxide 12%, trace elements 7%.