The invention discloses an interplanting method of fast-growing
eucalyptus and
cunninghamia lanceolata. The interplanting method includes planting steps: (1), selecting a parcel with a thick soil layer without waterlogging; (2),
transplanting: from February to May, digging holes and planting fast-growing encalyptus according to planting space of (1.5-2)mx(5-8)m, and digging holes and planting a row of
cunninghamia lanceolata among
row space of fast-growing encalyptus according to
row space of 2-3m; (3), topdressing fast-growing encalyptus from February to April of each year;
pruning and trimming parts below 1m after fast-growing encalyptus grows to 2m in height; applying decomposed
fertilizer to
cunninghamia lanceolata once a year according to 20-40kg per
plant, ditching at positions of 0.5-1m distant from trunks during applying, applying the
fertilizer into ditches, and covering with soil after fertilizing; (4), continuously
felling fast-growing encalyptus according to needs after thefourth year of planting,
felling according to needs after the fifth year of planting of cunninghamia lanceolata, digging up roots poor in
germination according to
germination conditions, and plantingin seedlings. By the method, the problem of water and
soil loss caused by planting of fast-growing encalyptus can be solved effectively, and labor input for weeding and
disease and pest of cunninghamia lanceolata can be reduced.