Site preparation, fertilization, and 10-year yields of hybrid poplar on a clearcut forest site in eastern Maine, USA

摘要: Cuttings of two similar hybrid poplar clones were planted on a drum-chopped, chip-harvested clearcut in eastern Maine. The site had never been previously cleared for agriculture. coarse loamy glacial till soils acid (pH < 5.0) and moist—moderately well—to somewhat poorly drained. Control, lime (L), L nitrogen (N), phosphorus (P), LNP, LNP potassium (K) treatments established. Competing woody vegetation was mowed once per year the first three years half area. Each treatment produced significantly greater biomass than corresponding unmowed treatment. After 10 years, mowed+LNPK attained greatest total biomass, 45 Mgha-1, while control least, 2 Mgha-1. On plots, 4 times control: 32 vs 8 Unmowed plots with N about as much (8 Mgha-1). Mowing each improved survival well growth.