Effect of Cultivation Measures on Wood Chemical Components of Eucalyptus grandis Pulpwood II.Mutual Efficiency Analysis and Optimization Choice
Feng MaoSong · Sichuan Nongye Daxue xuebao · 2005
By using the model of quadratic common rotation established between planting density, N, P, K and synthetic value of wood chemical components of Eucalyptus grandis Pulpwood, mutual-efficiency and optimization choice were done. High density and middle dosage of nitrogenous fertilizer can help the raise of wood chemical components value, and high density and middle dosage of phosphate fertilizer can get a high value of wood chemical components. High density and low dosage of potash fertilizer or low density and High dosage of potash fertilizer also can get a high value of wood chemical components. Nitrogenous fertilizer and phosphate fertilizer can exchange each other to a certain extent. Obvious interaction does not appear between nitrogenous fertilizer and potash fertilizer. Phosphate fertilizer and potash fertilizer also can exchange each other to a certain extent. When the four factors of density, N, P, K are in the confidence limit of 95%, the excellent cultivating pattern for high yield as well as high quality is the following: planting density is 152～153N/667m~2, N is 54～61g/N, P is 48～49g/N, K is 45～52g/N.